bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulating electron clouds in heavy-ion accelerators
Authors: Cohen R. H. , Friedman A. , Covo M. Kireeff , Lund S. M. , Molvik A. W. , Bieniosek F. M. , Seidl P. A. , Vay J.-L. , Stoltz P. , Veitzer S.
Published: April 2005

Contaminating clouds of electrons are a concern for most accelerators of positively charged particles, but there are some unique aspects of heavy-ion accelerators for fusion and high-energy density physics which make modeling such clouds especially challenging. In particular, self-consistent electron and ion simulation is required, including a particle advance scheme which can follow electrons in regions where electrons are strongly magnetized, weakly magnetized, and unmagnetized. The approach to such self-consistency is described, and in particular a scheme for interpolating between full-orbit (Boris) and drift-kinetic particle pushes that enables electron time steps long compared to the typical gyroperiod in the magnets. Tests and applications are presented: simulation of electron clouds produced by three different kinds of sources indicates the sensitivity of the cloud shape to the nature of the source; first-of-a-kind self-consistent simulation of electron-cloud experiments on the high-current experiment [L. R. Prost, P. A. Seidl, F. M. Bieniosek, C. M. Celata, A. Faltens, D. Baca, E. Henestroza, J. W. Kwan, M. Leitner, W. L. Waldron, R. Cohen, A. Friedman, D. Grote, S. M. Lund, A. W. Molvik, and E. Morse, “High current transport experiment for heavy ion inertial fusion,” Physical Review Special Topics, Accelerators and BeamsPRABFM 8, 020101 (2005)], at Lawrence Berkeley National Laboratory, in which the machine can be flooded with electrons released by impact of the ion beam on an end plate, demonstrate the ability to reproduce key features of the ion-beam phase space; and simulation of a two-stream instability of thin beams in a magnetic field demonstrates the ability of the large-time-step mover to accurately calculate the instability.
Three-dimensional magnetohydrodynamic simulations of the Helicity Injected Torus with Steady Inductive drive
Authors: Izzo V. A. , Jarboe T. R.
Published: April 2005

The Helicity Injected Torus with Steady Inductive drive (HIT-SI) [P. E. Sieck, W. T. Hamp, V. A. Izzo, T. R. Jarboe, B. A. Nelson, R. G. O’Neill, A. J. Redd, and R. J. Smith, IEEE Conference Record—Abstracts. 31st IEEE International Conference On Plasma Science (IEEE Catalog No. 04CH37537), 2004, p. 160] is a spheromak driven by steady inductive helicity injection (SIHI) and consists of the toroidally symmetric spheromak confinement region and two nonsymmetric helicity injectors. The three-dimensional (3D) magnetohydrodynamic code NIMROD [A. H. Glasser, C. R. Sovinec, R. A. Nebel, T. A. Gianakon, S. J. Plimpton, M. S. Chu, and D. D. Schnack, Plasma Phys. Controlled Fusion, 41, A747 (1999)] is used to simulate HIT-SI operation, but the code’s toroidally symmetric boundary requires a creative treatment of the injectors. Sustained HIT-SI operation is simulated with nonaxisymmetric boundary conditions. In driven simulations at low Lundquist number S no n=0 fields are generated as a result of relaxation of the predominantly n=1 injector fields until the injectors are quickly shut off. At S=500, an n=0 component arises due to relaxation during sustainment. As S is increased further, the ratio of n=0 (equilibrium) fields to n=1 (injector) fields increases. The effects of a thin insulating boundary layer on the plasma decay time are also discussed.
Microstructure of compositionally-graded (Ba1−xSrx)TiO3 thin films epitaxially grown on La0.5Sr0.5CoO3-covered (100) LaAlO3 substrates by pulsed laser deposition
Authors: Zhu Xinhua , Chan Helen Lai-Wah , Choy Chung-Loong , Wong Kin-Hung , Hesse Dietrich
Published: April 2005

Compositionally-graded (Ba1−xSrx)TiO3 (BST) epitaxial thin films (with x decreasing from 0.25 to 0.0) were deposited by pulsed laser deposition on (100)LaAlO3 (LAO) single-crystal substrates covered with a conductive La0.5Sr0.5CoO3 (LSCO) layer as a bottom electrode. X-ray and electron diffraction patterns demonstrate that the entire graded film has a single-crystal cubic structure. The epitaxial relationship between BST, LSCO, and LAO can be described as (100)BST‖(100)LSCO‖(100)LAO; [001]BST‖[001]LSCO‖[001]LAO. Cross-sectional transmission electron microscopy (TEM) images reveal that both the BST films and the LSCO bottom electrodes have sharp interfaces and overall uniform thickness across the entire specimen, and that they grow with a columnar structure. Planar TEM images show that the graded films exhibit granular and/or polyhedral morphologies with an average grain size of 50nm. High-resolution TEM images reveal aligned rectangular-shaped voids in the graded BST film, with length size of 12–17nm, and width of 5–8nm along the ⟨001⟩ direction in the (100) plane.
Fast grain boundary diffusion and rate-limiting surface exchange reactions in polycrystalline materials
Authors: Preis W. , Sitte W.
Published: April 2005

Analytical solutions to the diffusion equations for fast grain boundary diffusion in polycrystalline solids of finite thickness bounded by two parallel surface planes are presented. The grain boundary diffusion coefficient may be higher by several orders of magnitude than the bulk (volume) diffusion coefficient. The microstructure of the polycrystalline sample has been modeled by means of an isolated grain boundary as well as an array of parallel grain boundaries. The surface concentration has been assumed to vary continuously during the diffusion process, as the surface exchange reactions of the diffusing species are considered to be fairly slow and equilibrium between the surface and the constant diffusion source (gas phase) is not attained. Two different cases for surface diffusion at the interface polycrystalline sample/diffusion source are taken into account, viz. negligible and fast surface diffusion. The pertinent analytical solutions allow the calculation of two-dimensional diffusion profiles in thin films and average concentration profiles for semi-infinite diffusion systems. In addition, the time dependence of the total amount of diffusing species exchanged between the diffusion source and the solid sample has been calculated. The theoretical results are interpreted in terms of Harrison’s classification of diffusion regimes. The parallel grain boundary model enables the calculation of diffusion profiles for both type-A and type-B kinetics. In the case of type-A kinetics expressions for the effective diffusion coefficient as well as the effective surface exchange coefficient are proposed, which depend on the corresponding bulk values, the microstructure of the specimen, and the respective surface condition.
Not completely flattened radial profile of the electron temperature in the vicinity of magnetic islands in Tokamak Chauffage Alfvén Brésilien
Authors: Fonseca A. M. M. , Tsypin V. S. , Galvão R. M. O. , Kuznetsov Y. K. , Nascimento I. C. , da Silva R. P. , Saettone E. A. , Vannucci A.
Published: April 2005

Recent results obtained in TCABR (Tokamak Chauffage Alfvén Brésilien) [J. H. F. Severo, I. C. Nascimento, V. S. Tsypin, and R. M. O. Galvão, Nucl. Fusion 43, 1047 (2003)] show a nonmonotonic variation of the poloidal rotation velocity at the position of major magnetic islands. In this paper, the associated effect of the magnetic islands on the radial profile of the electron temperature is discussed. Analytical temperature profiles are used to analyze the experimental data obtained with electron cyclotron emission radiometry. It is shown that the competition between strong anomalous perpendicular diffusive transport and parallel heat convection is the dominant mechanism for the oscillations observed in the radial profile of the electron temperature in TCABR.
High mobility two-dimensional hole system in GaAs∕AlGaAs quantum wells grown on (100) GaAs substrates
Authors: Manfra M. J. , Pfeiffer L. N. , West K. W. , de Picciotto R. , Baldwin K. W.
Published: April 2005

We report on the transport properties of a high mobility two-dimensional hole system (2DHS) confined in GaAs∕AlGaAs quantum wells grown by molecular-beam epitaxy on the (100) surface of GaAs. The quantum wells are modulation doped with carbon utilizing a resistive filament source. At T=0.3K and carrier density p=1×1011cm−2, a mobility of 106cm2∕Vs is achieved. At fixed carrier density p=1011cm−2, the mobility is found to be a nonmonotonic function of the quantum well width. The mobility peaks at 106cm2∕Vs for a 15-nm well and is reduced for both smaller and larger well widths for these (100) samples. The mobility anisotropy is found to be small. Mobility along [01¯1] is approximately 20% higher than along the [011] direction. In addition, the low-temperature carrier density is found to have low sensitivity to light. The hole density increases by only ∼10% after exposure to red light at T=4.2K. In structures designed for a lower carrier density of 3.6×1010cm−2, a mobility of 800000cm2∕Vs is achieved at T=15mK.
Coherence-matched microfocusing of hard x rays
Authors: Nöhammer B. , David C. , Burghammer M. , Riekel C.
Published: April 2005

An efficient, high-resolution microfocusing device for hard x rays is presented. A combination of two linear zone plates mounted with orthogonal orientation is used to provide two-dimensional focusing. Choosing appropriate lens parameters, the device can be matched to the quasielliptical shape of most synchrotron x-ray sources to obtain a symmetric, circular-shaped focal spot. A rectangular device aperture allows the maximization of the light-collecting area and to simultaneously achieve a highly coherent illumination of the device. Such a setup was tested at the European Synchrotron Radiation Facility and test gratings with minimal line widths of 140 nm could be resolved. The gain in flux density was found to be 105 for 12.7 keV photons.
The influence of surface steps on the formation of Ag-induced reconstructions on Si(111)
Authors: Vanormelingen K. , Paredis K. , Vantomme A.
Published: April 2005

Using scanning tunneling microscopy, the influence of Si(111) surface steps on the formation of Ag-induced reconstructions was investigated. For low Ag coverage, both the 3×1 and the 3×3 structures form at the upper step edge while for increasing coverage, the 3×3 areas grow at the expense of the 3×1 and 7×7 regions. This growth critically depends on the height of the adjacent step. For a monoatomic step, the 3×3 patch grows uniformly (at the same level) over the upper and lower terrace resulting in a wandering of the step, while higher steps are splitted into two levels due to the formation of high and low Ag-covered areas. Furthermore, a quantitative description of the growth of the 3×3 patches is given, based on the shape evolution of the 3×3 regions and from the analysis of antiphase boundaries.
Optical microfiber loop resonator
Authors: Sumetsky M. , Dulashko Y. , Fini J. M. , Hale A.
Published: April 2005

We experimentally demonstrate an optical microfiber loop resonator. The resonator was formed in free space by creating a loop from the subwavelength-diameter waist of a short biconical optical fiber taper. The loop length was chosen so that the free spectrum range of the resonator was ∼100GHz at the optical communication wavelengths near 1.5μm. In order to change and optimize the spectral characteristics such as the effect of birefringence, the shape of resonances, and the free spectrum range, we manually varied the microfiber self-coupling by alignment of the input and output ends of the loop, which were attached to each other by Van der Waals and electrostatic forces. In particular, we tuned the microfiber loop resonator to exhibit resonances with a Q-factor exceeding 15 000 (finesse ≈10) and, also, to the regime of critical coupling with the extinction ratio of transmission oscillations exceeding 34dB. This paper was in press when we achieved the values of 95 000 and 630 000 for the loaded and intrinsic Q-factor, respectively (see note added in proof). We believe that the demonstrated Q-factor can be significantly enhanced with the more uniform microfiber.
Room-temperature phosphonium ionic liquids for supercapacitor application
Authors: Frackowiak Elzbieta , Lota Grzegorz , Pernak Juliusz
Published: April 2005

Ionic liquids (ILs) have been used as electrolytes for supercapacitors. Two phosphonium salts such as trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulfonyl)imide (IL1) and trihexyl(tetradecyl) phosphonium dicyanamide (IL2) have been selected for this target. To decrease the viscosity of ILs, a small amount of acetonitrile (from 5 to 25 wt %) was added. Supercapacitor based on activated carbon (AC) as electrodes and IL1 with 25 wt % of acetonitrile supplied capacitance values of 100F∕g at a high operating voltage of 3.4 V. Such a supercapacitor reached a high energy of ∼40Wh∕kg and a good cyclability.
Tellurite glasses for ultrabroadband fiber Raman amplifiers
Authors: Murugan G. Senthil , Suzuki Takenobu , Ohishi Yasutake
Published: April 2005

Tellurite glasses optimized for higher Raman gain and broad bandwidth have been realized. These glasses were found to have improved thermal stabilities, which make them suitable for fiber devices applications. While maintaining the Raman gains at higher values, the Raman bandwidths could be broadened by proper addition of alkaline earth oxides and heavy metal oxides in to the tellurite glasses. The relative Raman gain and Raman cross sections of the present glasses are better than the tellurite-based glasses reported earlier. Thus, higher Raman gain and much broader Raman amplifications could be possible by using this tellurite glass system as a gain medium compared with the conventional tellurite-based fiber Raman amplifiers.
The recently discovered primitive (non-Ditrysian) family Palaephatidae (Lepidoptera) in Australia
Authors: Nielsen ES
Published: April 2005

The recently described primitive monotrysian heteroneuran moth family Palaephatidae was first discovered from southern South America and is here reported from Australia. The Australian palaephatid fauna consists of one endemic genus, Azaleodes Turner, with one named species, micronipha Turner, and three species here described as new: fuscipes, brachyceros and megaceros. All Australian species are very similar and it has not been possible to separate the females. The males possess an impressive array of hairpencils and pockets with specialised scales on wings and abdomen. One possible additional autapomorphy for the Palaephatidae is listed. The monophyly and systematic position of Azaleodes are discussed; it is concluded that Azaleodes is not the sister-group of the remaining, South American Palaephatidae but is monophyletic with Sesommata Davis and Metaphatus Davis.
Pseudogaurax (Diptera : Chloropidae) from the Oriental and Australasian regions
Authors: Ismay JW
Published: April 2005

The Oriental and Australasian species of Pseudogaurax are revised. Six new species, pleuralis, collessi, novaeguineae, flavipes, solomonensis and trimaculatus, are described. A key to the nine known species is provided.
A revision of the Australian Hemerobiidae (Insecta : Neuroptera)
Authors: New TR
Published: April 2005

The Australian Hemerobiidae are revised, and keys and illustrations provided to facilitate identification of all known species. The 34 species are referred to 10 genera, one of which (Notherobius) is described as new. Thirteen new species are described in the genera Psychobiella (one), Psectra (two), Carobius (six), Notherobius (three) and Zachobiella (one). Several specific synonyms are established, and the genera Oxybiella and Drepanomina are synonymised with Megalornina. Kimminsiella is synonymised with Psectra.
Arpactophilus reassessed, with three bizarre new species from New Guinea (Hymenotpera : Sphecidae : Pemphredonindae)
Authors: Menke AS
Published: April 2005

Diagnostic characters of the Australian genus Arpactophilus are reviewed and augmented. Spilornena is demonstrated to be very similar morphologically, and the distinctions between the two genera are discussed. The known distribution of Arpactophilus now includes New Guinea, New Britain, New Caledonia, the Solomon Islands, and Fiji. Three new species of the genus are described from New Guinea: A. preposterus, A. rhinocerus and A. papua. The maxillary palpi of Arpactophilus, Spilomena, Xysrna and Microstigrnus are 5-segmented, not 6- as previously assumed. These four genera are removed from the subtribe Stigmina, and placed in a new subtribe, the Spilomenina.
Osmulidae (Insecta : Neuroptera) from Irian Jaya
Authors: New TR
Published: April 2005

Twenty new species of Spilosmylus Kolbe s.1. are described from Irian Jaya, and a revised key provided to enable separation of the 35 species of Osmylidae now known from the New Guinea region.
A revision of the Entomolepidisae (Copepoda : Siphonostomatoida), with descriptions of two species from Australia and comments on Entomolepis ovalis Brady
Authors: McKinnon AD
Published: April 2005

The siphonostomatoid family name Entomolepidae is emended to Entomolepididae, and a key to the family presented. The subfamily Parmulodinae Eiselt is redefined to accommodate the genus Paralepeopsyllus Ummerkutty. A single specimen of a copepodite 5-adult intermoult which is attributed to Entomolepis ovalis Brady, is described and illustrated, on the basis of which generic descriptions within the Entomolepididae are emended. Entomolepis hamondi sp. nov. from Bass Strait is added to the genus. Entornopsylhs gen. nov. is created to accommodate E. adriae (Eiselt) and E. nichollsi sp. nov. from Shark Bay, W.A.
A new marine triclad from the west Pacific (Platyhelminthes : Tricladida : Maricola)
Authors: Sluys R , Cannon LRG
Published: April 2005

The new marine triclad Jugatovaria polynesiana is described from Lifuka Island, Kingdom of Tonga. The species possibly is an ectosymbiont of lobsters.
The Geotrupinae of New Guinea (Coleoptera : Scarabaeidae)
Authors: Howden HF
Published: April 2005

Three genera of Geotrupinae occur in New Guinea: Gilletinus Boucomont, with seven species; Australobolbus Howden and Cooper, with eight species; and Blackburnium Boucomont with one species. These are keyed and illustrated, and the following new species are described: Gilletinus acutus, G. rabaulensis, G. variegatus, G. occidentalis, G. rugoslfrons, G. bipagus, Australobolbus papuanus, A. bacchusi, A. latipennis, A. tricornis, A. cruciatus, and A. parvus. Four of the New Guinea species, Gilletinus bipagus, Australobolbus I. laratinus (Arrow), A. rotundatus (Hope), and Blackburnium rhinoceros (Macleay), also occur on mainland Australia. The remainder are endemic to New Guinea and its adjacent islands.
A review of the water mite family Limnocharidae in Australia (Acarina)
Authors: Harvey MS
Published: April 2005

Neolimnochares kakadu, sp. nov., from the Northern Territory is described; Limnochares australica Lundblad from Western Australia, New South Wales, Victoria and Tasmania, and Rhyncholimnochares womersleyi (Lundblad) from New South Wales, Queensland, Victoria and Tasmania are redescribed.
Anthracalaus australis Fleutiaux, a little-known Australian Elaterid (Coleoptera : Elateridae), with a key to related genera
Authors: Calder AA
Published: April 2005

Anthracalaus australis Fleutiaux from Australia is redescribed and illustrated. On the basis of adult characters Pseudomelanactes Mathieu from North America is regarded as most closely related to Anthracalaus Fairmaire, which is thus assigned to the tribe Pseudomelanactini. Aphileus Candéze, previously placed in Pseudomelanactini, is transferred to the Hemirhipini (sensu Casari-Chen 1985). A key to the Australian agrypnine-tetralobine genera, excluding Conoderini, is provided.
New Margarodid species (Homoptera: Coccoidea : Margarodidae : Monophlebinae) from New Guinea
Authors: Bhatti S , Gullan PJ
Published: April 2005

Three new genera and 11 new species from New Guinea are described in the tribe Monophlebulini. Erropera, gen, nov., contains four new species: E. ablusa, E. papuensis, E, pilosa and E. sedlaceki; Modicicoccus, gen. nov., contains four new species: M. gagnei, M. kaindiensis, M. monticolus and M. rtewsteadi; and Peengea, gen. nov., contains one new species: P. affinis. Two new species of Mottophlehirlus Cockerell, M. enarotalicus and M. gressitti, are described. The adult females of all 11 new species and the first instar nymphs of E. sedlaceki and P. affinis are described. A marsupium associated with the genital opening of the adult female is reported for the first time in the tribe Monophlebulini.
A taxonomic revision of species in the freshwater crayfish genus Engaeus Erichson (Decapoda : Parastacidae)
Authors: Horwitz P
Published: April 2005

In a revision of the species in the genus Engaeus, the number of species is increased to thirty-four, resulting from the addition of fourteen new species, nine of them endemic to Tasmania (E. disjuncticus, E. granulatus, E. lengana, E. mairener, E. martigener, E. nulloporius, E. orramakunna, E, spinicaudatus and E. tayatea), and five endemic to Victoria (E. curvisuturus, E. karnanga, E. mallacoota, E. merosetosus and E. rostrogaleatus). Four species have been synonymised: E. jumbunna with E. hemicirratulus, E. connectus with E. tuberculatus, E. marmoratus with E. quadrimanus, and E. parvulus with E. cymus. A key to species is provided. For all species are given synonymies, a diagnosis, a discussion of morphological variation, notes on life histories and general ecology, and distribution.
Revision of the genus Schedotrioza Tuthill & Taylor (Homoptera : Psylloidea : Triozidae)
Authors: Taylor SG
Published: April 2005

A systematic revision of the gall-forming genus Schedotrioza Tuthill & Taylor (Psylloidea : Triozidae) is presented. Twelve species are recognised, seven of which are new. These are S. apicobystra, sp. nov., S. cornuta, sp. nov., S. distorta, sp. nov., S. luteogalla, sp. nov., S. occidentalis, sp. nov., S. serrata, sp. nov. and S. sinuosa, sp. nov. Two new synonyms are proposed: S. multitudinea (Maskell) as the senior synonym of S. circularis (Froggatt) and S. orbiculata (Froggatt) as the senior synonym of S. carnosa (Froggatt). Trioza tasmaniensis (Froggatt) is herein transferred to Schedotrioza. The other species recognised are S. eucalypti (Froggatt) and S. marginata Taylor. A key to the species is provided. Where available, the adult male, adult female and mature gall are described and illustrated. Notes on their biology, including host-plant data, are also presented.
Revision of the Australian ground-beetle genus Tasmanitachoides Erwin (Insecta : Coleoptera : Carabidae : Bembidiinae), with special regard to the tropical species
Authors: Baehr M
Published: April 2005

The Australian Tachyine genus Tasmanitachoides Erwin is revised, and the following new species are described: T. angulicollis, sp. nov., T. maior, sp nov., T. minor, sp. nov., T. bicolor, sp. nov. and T. rufescens, sp. nov. Lectotypes and paralectotypes are designated for T. leai (Sloane) and T. obliquiceps (Sloane), and T. wilsoni (Sloane) and T. obliquiceps (Sloane), not mentioned by earlier revisors of the genus, are included in Tasmanitachoides. From a short evaluation of the phylogenetic status of the species, it appears that the generalised groups of species are still living in south-eastern Australia, including Tasmania, whereas most species of the more derivative species group have spread over tropical northern Australia, and are still in a period of rapid evolution.
Some Thoracostomopsidae (Nematoda : Enoplida) from Australia, including descriptions of two new genera and diagnostic keys
Authors: Greenslade P , Nicholas WL
Published: April 2005

Two new genera, Fleuronema, with the species F. dorca and F. robusta, and Okranema, with the species O. militaris and O. eileenae, and a new species of Epacanthion, E. exploratoris, are described from Australian waters. Keys are given to the world species of Epacanthion, which is redefined. Two species, E. galeatum and E. rnultipapillaturn, are recorded from Australia; additions are made to their descriptions. Three species, E. crassus, E. filicaudatum and E. incurvatus, are transferred to Enoploides.
Revision of the Australian bee fly genus Aleucosia Edwards (Diptera : Bombyliidae)
Authors: Yeates D
Published: April 2005

Comptosia (Aleucosia) Edwards is diagnosed and Chelina Hull and Paramonovomyia Evenhuis are synonymised with it. The characters of the Australian Lomatiinae are specified and a key to the Australian genera of Lomatiinae is presented. Aleucosia is divided into 8 species-groups based on wing pattern and integumental colour. Cladistic relationships between the species and species-groups are delineated. Keys to these species-groups and to the species within them are presented. For most species the antenna1 flagellum, male and female genitalia and distribution are illustrated. Aleucosia contains at least 38 species; 16 are redescribed and 20 described as new. Alyosia tricellata (Macquart) and Alyosia tripunctata (Macquart) are synonymised under Aleucosia atherix (Newman). Lectotypes are designated for A. triceliata (Macquart), A. cuneata (Edwards), A. norrisi (Hull), A. plena (Walker) and A. serpentiger (Walker). The following new species are described: A. albovittata, A. hyalina, A. saltuaria, A. directa, A. sugillata, A. arguta, A. marginata, A. preclara, A. abdita, A. tridentata, A. affinis, A. aquila, A. guttata, A. multipunctata, A. colona, A. pallida, A. obtusa, A. illota, A. danielsorum and A. adusta.
A revision of the Phillippine Coroebine genus Obenbergerula Strand (Coleoptera : Buprestidae : Agrilinae)
Authors: Bellamy CL
Published: April 2005

The Philippine coroebine genus Obenbergerula Strand is revised for the first time with four species recognised: O. paradoxa (Hoscheck) (the type species), O. horni (Hoscheck), O. bakeri (Fisher) and one new species, O. confusa. The species are separated in a key, illustrated, and the known distribution is shown on a map. Brief comments on the phylogeny of a cladogram for the genus are given.
Descriptions of larval Leptus (Acarina : Erythraeidae) ectoparasitic on Australian diptera, and two earlier described Australian larvae
Authors: Southcott RV
Published: April 2005

The Australian larval Leptus (Acarina : Erythraeidae) ectoparasitic on Diptera are reviewed, with the redescription of L. bathypogonus Womersley and the description of seven new species: L. alopecurus, L. alvimordax, L. charon, L. comosus, L. fortei, L. francesi and L. swani. Redescriptions are given of L. anomalus Southcott (no host known) and L. chelonethus Womersley (off Pseudoscorpionida). A key is given to the known larvae from Australia and New Guinea. L. debeauforti (Oudemans) from an ant, West Irian, is left unkeyed.
Descriptions of larvae of Australian Omorgus Erichson, with implications for the phylogeny of the Trogidae (Insecta : Coleoptera)
Authors: Scholtz CH
Published: April 2005

Larvae of six species of Omorgus (Omorgus) Erichson are described from Australia, the first members of the family to be described from the continent. Although the species belong to the same subgenus as the New World species, they differ from the latter in the following phylogenetically important aspects: number of mandibular teeth, presence or absence of a sclerotised sensory cone on the epipharyngeal haptolachus, setation of the apical margin of the glossa, arrangement of stridulatory teeth on maxillary stipes, and the number and arrangement of tibio-tarsal setae.
Phradmon, a new genus of Paleonurini (Collembola : Neanuridae) from Australia with a key to the genera from southern regions and notes on Pronura
Authors: Greenslade P , Deharveng L
Published: April 2005

Phradmon, gen. nov. (Neauridae : Paleonurini) is created for four new species (Phradmon floccosus, sp. nov., Phradmon maralali, sp. nov., Phradmon tasmaniae, sp. nov., and Phradmon trisetosus, sp. nov.), one described species (Paranura australasiae Womersley, 1935) and one described subspecies (Achorutes hirtellus schoetti Womersley, 1935). The last-named is here elevated to a full species, Phradmon schoetii, and Neanura womersleyi Yosii, 1966 is synonymised with it. All species are from Australia. Lobella (Propeanura) australica Yosii, 1966 is transferred to Pronura and a key is given to the 11 genera of the Paleonurini from southern regions.
The genera of the Saphaeromatidae (Crustacea : Isopoda): a key and distribution list
Authors: Harrison K , Ellis JP
Published: April 2005

An illustrated key to the genera of the family Sphaeromatidae, based on adult male specimens, is provided. This is complemented by notes on the distribution of the 81 known genera. It is suggested that Nishimuraia Nunomura may be a junior synonym of Gnorimosphaeroma Menzies, but this requires confirmation. It is suggested that the current sphaeromatid subfamilies Cassidininae, Sphaeromatinae and Dynameninae, based only on the folding of pleopods 4 and 5, may not reflect a natural classification. A modern analysis of sphaeromatid systematics is long overdue.Key words: Sphaeromatidae, genera, key, distribution.
Synopsis of Australasian Microgastrinae (Hymenoptera : Braconidae), with a key to genera and description of new taxa
Authors: Austin AD , Dangerfield PC
Published: April 2005

The genera of microgastrine braconid wasps present in the Australasian region (defined as Australia, New Zealand, New Caledonia, New Guinea, Solomon Is, Fiji Is, Samoan Is, Cook Is, but not French Polynesia) are reviewed. An illustrated key to genera, comments on their taxonomy, and information on the distribution and host relationships of species are provided. Following examination of holotypes, the generic placement of all species recorded from the region is reassessed since a recent generic reclassification of the subfamily left most of the Australasian species incorrectly placed. Parapanteles Ashmead (N.T.), Fornicia Brullé (Qld) and Deuterixys Mason (Qld) are recorded from Australasia for the first time, while Buluka De Seager, Parenion Nixon, Snellenius Westwood and Wilkinsonellus Mason, previously known from Australasia, are recorded from mainland Australia for the first time. The genus Austrocotesia is described as new [with A. exigua, sp. nov. (Papua New Guinea) as the type species], along with the following 14 species: Austrocotesia delicata, sp. nov. (Papua New Guinea, Qld), A. paradoxa, sp. nov. (Papua New Guinea), Buluka collessi, sp. nov. (Qld), Deuterixys anica, sp. nov. (Vic., N.S. W., Qld), Fornicia commoni, sp. nov. (Qld), Glyptapanteles deliasa, sp. nov. (S.A.), Microgaster nixoni, sp. nov. (Tas., N.S.W.), Parapanteles masoni, sp. nov. (N.T.), Parenion beelaronga, sp. nov. (Qld), P. bootha, sp. nov. (Qld), Sathon albicoxa, sp. nov. (Tas., Vic., N.S.W.), S. naryciae, sp. nov. (Vic.), Wilkinsonellus amplus, sp. nov. (Qld, N.T.) and W. tomi, sp. nov. (Papua New Guinea, New Britain, Qld). Glyptapanteles guyanensis (Cameron), comb. nov. is excluded from the Australasian fauna; the name Glyptapanteles fullawayi, nom. nov. (Samoa) is proposed for Apanteles opercuiinae var. polita Fullaway; lectotypes are designated for Cotesia deliadis (Bingham), comb. nov. (Qld), C. philoeampa (Cameron), comb. nov. (N.S.W) and C. rufiventris (Bingham), comb. nov. (Qld); Glyptapanteles operculinae (Fullaway), comb. nov. (Samoa), Microgaster kuchingensis Wilkinson (Papua New Guinea) and Sathon moratus (Wilkinson), comb. nov. (Vic., S.A., W.A.) are redescribed; and 41 additional new combinations are proposed.
Blepharocosta, a new genus of Australian Spondyliaspidinae (Hemiptera : Psylloidea)
Authors: Taylor KL
Published: April 2005

A new genus, Blepharocosta, is erected for the species Rhinocola marmorata Froggatt, formerly placed in Australopsylla, and six new species, B. subsolana, B. cloezianae, B, phaeotrichae, B. baxtericola, B. marginaticola and B. minima. The host plants of all seven species, except one (Eucalyptus cloeziana), are species of Eucalyptus that belong to the subgenus Monocalyptus.
Revision of the genus Neuroscelio Dodd, primitive Scelionids (Hymenoptera : Scelionidae) from Australia, with a discussion of the Ovipositor system of the tribe Gryonini
Authors: Galloway ID , Austin AD , Masner L
Published: April 2005

The endemic Australian genus Neuroscelio Dodd, previously known only from the holotype of N. nervalis Dodd and treated as a genus incertae sedis by previous authors, is revised, with the inclusion of four new species: N. doddi, sp. nov. and N. storeyi, sp. nov. from Queensland, and N. noyesi, sp, nov. and N. stirlingensis, sp. nov. from south-western Western Australia. An illustrated key to species is provided along with information on their distribution and habitat. The genus is redescribed and its relationships with other genera in the Scelioninae and tribe Gryonini are discussed. Neuroscelio retains a number of character states primitive within the subfamily. The morphology of the ovipositor system is described for the Gryonini for the first time, with Neuroscelio having an ovipositor and associated structures typical of the group.
Pycnisia raptor, a new genus and species of predatory troglobic shrimp (Crustacea : Decapoda : Atyidae) from northern Australia
Authors: Bruce AJ
Published: April 2005

Pycnisia raptor, gen. et sp. nov., a new predatory troglobic atyid shrimp from a limestone cave near Katherine, Northern Territory, Australia, is described and illustrated. The shrimp is immediately distinguishable from all other atyids by the presence of robust, raptorial ambulatory pereiopods. The troglobic atyid fauna of Australia is reviewed and a key provided for the identification of the six species of four genera presently known.
A revision of the Australian beetle genera Eucanthus Westwood, Bolbobaineus Howden & Cooper, Australobolbus Howden & Cooper and Gilletinus Boucomont (Scarabaeidae : Geotrupinae)
Authors: Howden HF
Published: April 2005

The species in four genera of Australian Geotrupinae, all belonging to the tribe Bolboceratini, are described, keyed (males only) and illustrated. In Eucanthus Westwood one species, E. felschei Boucomont, is recognised as valid. Also in Bolbobaineus Howden & Cooper one species, B. planiceps Macleay, is recognised. In Australobolbus Howden & Cooper, 46 species are recognised with 29 new species: A. adamsi, A. allsoppi, A. aridulus, A. austrinus, A. bihamus, A. binasutus, A. canalis, A. carnabyorum, A. centrus, A. convergifrons, A. distropis, A. intermedius, A. labratus, A, lineocollis, A. lobatus, A. lobocapsus, A. masneri, A. monteithi, A, mouldsi, A. obtusus, A. occidentalis, A. pseudobscurius, A. pseudolaevipes, A. pygmaeus, A. rossi, A. sedlaceki, A. tibialis, A. walfordi, and A. weiri. In Gilletinus Boucomont, five species are recognised, with two new species: G. porosus and G. williamsi. A short taxonomic supplement is included in an addendum; in it the female of Blackburnium quinquecorne (Lea) is described. Three new species from Western Australia (S. enigmaticus, S. lividus and S. spatuliferus) are added to the genus Stenaspidius Westwood.
First record of Thermosbaenacea (Crustacea) from the Southern Hemisphere: a new species from a cave in tropical Western Australia
Authors: Poore GCB , Humphreys WF
Published: April 2005

The crustacean order Thermosbaenacea is reported for the first time from the Southern Hemisphere, from almost fresh water in a cave habitat in tropical Western Australia. Halosbaena tulki, sp. nov. belongs to a genus previously known only from saline waters in the West Indies, Columbia and Canary Is. The discovery is consistent with a very ancient origin of the order and distribution of the genus by plate movements following the breakup of Pangaea.
The Australian Sympycninae (Diptera : Dolichopodidae): Introduction and description of a new genus, Yumbera
Authors: Bickel DJ
Published: April 2005

The dolichopodid subfamily Sympycninae in Australia is briefly reviewed. The genus Yumbera is newly described and comprises Y. callida (Parent) and four new species, Y. signata, Y. nudicornis, Y, athertonia and Y. conica. It is confined to moist eastern Australian forests from the Cairns district, northern Queensland, to Victoria. Phylogenetic and zoogeographic analyses are presented; these suggest that current species distributions reflect past differentiation and fragmentation of Australian mesic forests.
Idoteidae of Australia and New Zealand (Crustacea : Isopoda : Valvifera)
Authors: Poore GCB , Lew Ton HM
Published: April 2005

The isopod family Idoteidae is diagnosed to distinguish it from other valviferan families. It is represented in Australia by 23 species and in New Zealand by four species. Except for the pelagic cosmopolitan species, Idotea metallica, all species occur only in shallow macroalgae and sea-grass habitats and are mostly confined to temperate waters. In Australia, the species have more or less limited ranges along the southern coast between Sydney (33°S.) and just north of Perth (29°S.) with the exception of three species which occur in subtropical Western Australia. In New Zealand, no species is found north of Wellington (41°S.). The valviferan family-groups are briefly reviewed and the Idoteidae rediagnosed. The Australian species Lyidotea nodata Hale, 1929 is removed to the arcturid complex, but its family placement is uncertain. Some species from New Zealand, 'Austridotea (Austridotea)' annectans Nicholls, 1937, 'A. (A.)' benhami Nicholls, 1937, 'Notidotea' lacustris (Thomson, 1879), and Idotea festiva Chilton, 1885, are regarded as chaetiliids and are also excluded. A new genus, Batedotea, is erected for Crabyzos elongata Miers. A neotype is selected for Zdotea stricta Dana and the species' position in Euidotea is confirmed. All genera and species are diagnosed and illustrated and complete synonymies are given. A key for their identification is presented. The Australian species are: Batedotea elongata (Miers), Crabyzos longicaudatus Bate, Engidotea cristata, sp. nov., Euidotea bakeri (Collinge), E. caeruleotincta Hale, E. danai, sp. nov., Euidotea halei, sp. nov., E. peronii (Milne Edwards), E. stricta (Dana), I. brevicorna Milne Edwards, I. metallica Bosc, Paridotea aquarii, sp. nov., P. collingei, sp. nov., P. miersi, sp, nov., P. munda Hale, P. simplex, sp. nov., P. ungulata (Pallas), Pentidotea australis Hale, Synidotea grisea, sp. nov., S. keablei, sp. nov., S. watsonae, sp. nov., Synidotea sp. and Synischia levidensis Hale. The New Zealand species are: Batedotea elongata (Miers), Euidotea durvillei, sp. nov., I. metallica Bosc and Paridotea ungulata (Pallas). A more restrictive definition of the Idotea implies that many of its Northern Hemisphere species may need to be included in other genera. Idotea hectica (Pallas) is placed in Synischia Hale.
Revision of Tricimba Lioy and Aprometopis Becker (Diptera : Chloropidae) from Australia and the Papuan region
Authors: Ismay JW
Published: April 2005

The genus Tricimba. in its broadest sense. is revised from Australia. New Guinea. and Bismarck and Solomon Islands and Vanuatu . In all, 66 species are recorded from Australia. 39 from New Guinea and the Bismarck Archipelago. five from the Solomon Islands and two from Vanuatu . A total of 96 species is included in the keys: seven described species. 87 new species of Tricimba (T . aberrans. T . acuta, T. acuticercalis, T. aliciae, T. angustigena, T. antennata, T. approximata, T. aurata, T. aureopilosa, T. auriculata, T. biannulata, T. biloba, T. biseta, T. breviradialis, T. cana, T. calcarula, T. cardamomi, T. concava, T. difficilis, T. digitata, T. distigma, T. diversa, T. edentata, T. elongata, T. excavata, T, exsinuata, T. exvittata, T. facialis, T. flaw, T. flavigena, T. flavitibia, T. flavoscutellata, T. fusciseta, T. grevei, T. hardyi, T. katepisternalis, T. lactipennata, T. laevigata, T. languida, T. lata, T. latigena, T. liepae, T. longicercalis, T. longigena, T. longiseta, T. lutea, T. maculata, T. major, T. melanochaeta, T. minuta, T. monochaeta, T. monosticha, T. muitiseta, T. nigriseta, T. nitens, T. nitidifrons, T. nitidissima, T. obscura, T. occidentalis, T. oligochaeta, T. pandanicola, T. papuensis, T. parksorum, T. pendula, T, pilioculata, T. pilosa, T. pinguiseta, T. planiscutellata, T. pleichaeta, T. priori, T. propinqua, T. pubiantennata, T. quadriseta, T. rectiantennata, T. scrobiculata, T, simplex, T. solomonensis, T. tasrnanensis, T. tenuis, T. thistletoni, T. tibialis, T. tomentosa, T. tuberoscula, T. uniseta, T. vanuatensis, T. vulgaris, T. wauensis), one new species of Aprometopis (A. australis) and one new genus and species (Pseudotricimba anomala). Tricimba steatodae Hickman, 1971 is newly synonymised with T. convexa Malloch, 1927. The species considered are grouped into three genera and 17 species-groups within Tricimba. The relationships of the species-groups with each other and with extra-limital species-groups, and the relationships of the genera are tabulated and discussed. The genera Nartshukiella, Euhippelates, Eutricimba and Crassivenula are considered to correspond to the level of species-groups of Tricimba in this revision and are synonymised with Tricimba. The relationships of the tribes Tricimbini and Incertellini are discussed.
A higher classification of the Australian Acridoidea (Orthoptera). III. Subfamily Acridinae
Authors: Key KH L
Published: April 2005

The classification of the genera of Australian Acridoidea commonly referred to the subfamilies Acridinae and Oedipodinae was examined. The two groups are reduced to tribal rank within the Acridinae, where they intergrade. The wings of a male of each of the named genera are figured.
Wundacaenis, a new genus of Caenidae (Insecta : Ephemeroptera) from Australia
Authors: Suter PJ
Published: April 2005

A new genus, Wundacaenis, is erected for three new species of Australian caenid mayflies. The genus is diagnosed by possession of distinctive lobes on the anterolateral margins of the mesonotum. The distribution of Wundacaenis extends from the Kimberleys in Western Australia, through the Alligator Rivers Region in the Northern Territory, and down the eastern coast to the Shoalhaven River in New South Wales.
Haptolana pholeta, sp. nov., The first subterranean flabelliferan isopod crustacean (Cirolanidae) from Australia
Authors: Bruce NL , Humphreys WF
Published: April 2005

The genus Haptolana Bowman, 1966 is rediagnosed, and is characterised by the unique synapomorphy of pereopods 2–7 having an expanded propodus, the palm of which contains a V-shaped series of spines and a haptorial dactylus which folds in between these spines. Haptolana pholeta, from anchialine waters on Barrow Island, Western Australia, is described, and is distinguished from the two other species of Haptolana in possessing a frontal lamina that is anteriorly rounded, that separates the antennule bases and is visible in dorsal view.
Axinellida (Porifera : Demospongiae) from the New Caledonia lagoon
Authors: Hooper JNA , Levi C
Published: April 2005

Sixteen species of axinellid demosponges, including seven new species and seven new locality records, are described from the shallow-water New Caledonian lagoon and reefs [families Axinellidae (12 species, Cyrnbastela, Reniochalina, Axinella, Phakellia, Stylissa, Ptilocaulis, Pseudaxinella, Rhaphoxya) and Desmoxyidae (4 species, Myrrnekioderrna, Higginsia)], bringing the total number of described axinellid species in this region to 25. Brief revisions are provided for several of these genera, based primarily on the Indo-west Pacific fauna, in order to place these New Caledonian species. Non-endemic New Caledonian axinellids belong predominantly to the north-eastern Australian (Solanderian province) and Indo-Malay fauna, usually representing the easternmost extent of these species' distributions in the Indo-west Pacific. Two species, Axinella carteri (Dendy) and Astrosclera willeyana Lister, were found to be truly widely distributed throughout the Indo-Pacific, typically associated with coral reefs; other previously suspected widely distributed species were generally found to be allopatric, cryptic sibling species related to the tropical Australasian fauna.
Family revision and cladistic analysis of the Nereidoidea (Polychaeta : Phyllodocida)
Authors: Glasby CJ
Published: April 2005

A family revision and cladistic analysis of the superfamily Nereidoidea sensu George and Hartmann - Schroder, 1985 (Polychaeta : Phyllodocida) based on internal and external morphological characters is presented. The superfamily, presently lacking synapomorphies, contains the Antonbruunidae, Calamyzidae, Hesionidae, Levidoridae, Nautiliniellidae, Nereididae, Pilargidae and Syllidae. Three synapomorphies are proposed: anterior or, rarely, anteroventral palps; paired pharyngeal retractor muscles; and the presence of metanephromixia. On the basis of this definition, the Chrysopetalidae are moved to the Nereidoidea. The requirement for ingroup monophyly necessitated synonymising the Antonbruunidae with the Pilargidae, and the Calamyzidae and Levidoridae with the Syllidae. The Nautiliniellidae are redefined. The cladistic analysis using 15 characters (21 apomorphic character states) and 3 outgroups (Aphroditidae, Polynoidae, and Sigalionidae) produced 3 minimum-length cladograms each with 29 steps and consistency index of 0.72. The cladograms showed the Nereidoidea to consist of 2 monophyletic groups: the Nereididae - (Chrysopetalidae - Hesionidae) and the Pilargidae - Nautiliniellidae - Syllidae. The topology of the latter group was variable; one cladogram had the Pilargidae as the sister-group of the Nautiliniellidae and Syllidae, and another had the Syllidae as the sister-group of the Nautiliniellidae and the Pilargidae. Evolutionary scenarios for multistate characters are given, and the phylogenetic relationships of taxa are discussed.
Remarks in the tribe Phlugidini Eichler and recognition of the new taxa from the Indo-Malayan region and east Africa (Grylloptera : Tettigonioidea : Meconematidae)*
Authors: Kevan DKM , Jin XB
Published: April 2005

The tribal status of Phlugidini Eichler, 1938, is confirmed. A new definition of the tribe is suggested and the taxonomic relationships among genera related to the tribe are discussed. Two new genera, nine new species and one new combination are described from East Africa, New Guinea, Northern Australia, Sulawesi and Borneo. These new taxa are Phlugidia africana Kevan, Tenuiphlugis Kevan, Tenuiphlugis gressitti (Chopard, 19691, comb. nov., T. maai Jin, T. brittoni Jin, T. malkini Jin, Phlugis sulawesi Jin, P. borneoensis Jin, P. burgersi Jin, P. novaeguineaensis Jin, P. rapax Jin and P. philippina Jin.*There is more than one system dealing with the higher classification of orthopteroid insects (for detail, see Jago 1977; Kevan 1977; Ragge 1977; Rentz 1977; Vickery 1977). Among them, Rentz (1979), Kevan (1982) and Vickery and Kevan (1986) are the major recent representatives of different opinions. The designation of the Phlugidini in this paper follows the system of Vickery and Kevan (1986).
New species of Xyalidae (Nematoda : Monhysterida) from Australian ocean beaches
Authors: Stewart AC , Nicholas WL
Published: April 2005

Eight new species of Xyalidae are described from Australian ocean beaches. Gonionchus australis, sp. nov., has non-capitate spicules with recurved tips and lacks longitudinal crests on the cuticle. G. alastairi, sp. nov., has cuticular crests and a strong dorso-caudal gubernacular apophysis. Xyala brevibucca, sp. nov., has a very shallow buccal cavity and small amphids. X. hanleyi, sp. nov., is similar but has fewer longitudinal crests, a longer thinner tail and weakly curved spicules. X. macramphis, sp. nov., has sexually dimorphic amphids, larger in males, and many somatic setae. Omicronema australis, sp. nov., has a very deep buccal cavity and males have two rows of ventral post-anal setae. O. australis from southern Australia are larger than those from the north. O. coronalata, sp. nov., has distinctive cephalic annulation, and O. nana, sp. nov., is very small, weakly annulated and with large amphids. Separation of the genus Omicronema from Xyala is supported.