Asiobaccha albipeza Mengual, sp. nov.
Creators: name: Mengual, Ximo
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Asiobaccha
Asiobaccha albipeza

description: <i>Asiobaccha albipeza</i> Mengual sp. nov. (Figure 3c, d, f) <i>Description</i> <i>Male: Head.</i> Face flat with distinct facial tubercle, tawny (yellow-brown), white pilose, white pollinose laterally and shiny (bare) medially on tubercle; gena yellow-brown (Figure 3f); lunule dark; frons slightly protruded forward, black, black pilose, pale pollinose laterally and dorsally, shiny basomedially; vertical triangle narrow, isosceles, black; antenna yellow-brown, black pilose; arista brown, bare; eye bare; occiput black, white-silver pollinose, yellow pilose on ventral 3/4 and dark pilose on dorsal 1/4. <i>Thorax.</i> Scutum black with bluish iridescence, medially brown pollinose, with short and scarce black pile; mesonotal fringe well-defined on anterior part of scutum, with white pile; postpronotum black, bare, white pollinose; notopleuron black, white pollinose; scutellum black, black pilose, subscutellar fringe absent (Figure 3c, d). Pleuron black, pale pilose, anterior anepisternum with pale pile on anterodorsal quarter; densely pale pollinose on posterior anepisternum, dorsal katepisternum and katatergum; metaepisternum pilose ventrad to spiracle; metasternum bare; calypter small, reduced, yellow; plumula almost absent, pale; halter brown; posterior spiracular fringes yellow. <i>Wing</i>: alula narrow, slightly broader than costal cell apically, triangular, bare with some microtrichia anteroapically. Wing membrane hyaline, stigma brown and costal cell brownish; extensively microtrichose, except cell R bare posterobasally before RS furcation, cell BM bare on basal 3/4, and cell CuP and anal lobe bare on basal 1/3. <i>Legs</i>: entirely brown except tarsi; pro- and mesotarsi white-yellow except basotarsomere brown on basal 1/2, metatarsus white-yellow except basotarsomere dark on basal 1/5 or less. <i>Abdomen.</i> Petiolate, unmargined, black with bluish iridescence, mainly black pilose except tergum 1 pale pilose, with a black pollinose pattern as follows: terga 2 <i>–</i> 4 with a black pollinose fascia on posterior margin, tergum 2 also with a narrow basal fascia and a medial, small macula of black pollinosity (Figure 3c, d); sterna 2 <i>–</i> 4 black with bluish iridescence with a black pollinose fascia on posterior margin; male genitalia black. <i>Female.</i> Similar to male except for normal sexual dimorphism and as follows: frons black, shiny, with white pollinosity on eye margin until half-way between antennal insertion and anterior ocellus; ocellar triangle black, shiny. <i>Variation.</i> Some paler specimens have pro- and mesofemora yellowish on apical 1/2 and pro- and mesotibiae yellowish on basal 1/2. Other specimens may have a darker face. <i>Length (N = 4).</i> Body, 12.5 <i>–</i> 15.2 (14.2) mm; wing, 11.0 <i>–</i> 13.0 (12.5) mm. <i>Geographical distribution</i> Species known from Solomon Islands archipelago, including Bougainville Island. <i>Etymology</i> The specific epithet is derived from the Latin <i>albus</i> meaning white (Brown 1956, p. 77) and the Greek <i>peza</i> meaning foot (Brown 1956, p. 343), and it refers to the white metatarsi. Species epithet is to be treated as adjective. <i>Differential diagnosis</i> Species with the alula narrower than cell BM, and with the abdomen and the scutellum dark, without pale markings. It can be distinguished from <i>A. praefica</i> and <i>A. samoaensis</i> by the narrow alula and the white metatarsus. <i>Type locality</i> Solomon Islands: Guadalcanal Province, Gold Ridge-Suta, Mount Chaunapaho (= Jonapau), 1100 m, 9°38 <i>’</i> S, 160°06 <i>ʹ</i> E. <i>Material examined</i> <i>Type material.</i> <i>Holotype</i>, male, deposited in the Bernice P. Bishop Museum (Honolulu, Hawaii, USA) and labelled: <i>‘</i> SOLOMON IS. // Guadalcanal: Gold // Ridge-Suta // (Jonapau) 1100 m. // VI-26-1956 <i>’</i>, <i>‘</i> J. L. Gressitt // Collector <i>’</i>, <i>‘</i> HOLOTYPE // <i>Asiobaccha</i> // <i>albipeza</i> // <i>des. X. Mengual 2014’</i> [red] (specimen photographed). <i>Paratypes</i>: PAPUA NEW GUINEA: Bougaineville Prov., Kokure, 690 m, 8 June 1956, E.J. Ford, Jr. [1&amp;female;, BPBM];..., Togerao, 600 m, 15 <i>–</i> 21 April 1968, Malaise trap, R. Straatman [1&amp;female;, ZFMK, ZFMKDIP 00011907]. SOLOMON ISLANDS: Isabel Prov., Molao, 30 June 1960, C.W. O <i>’</i> Brien [1&amp;male;, BPBM]; Makira-Ulawa Prov., Makira (= San Cristóbal), Napagiwae, 19 August 1960, C.W. O <i>’</i> Brien [1&amp;female;, BPBM]; Guadalcanal Prov., Suta, 500 <i>–</i> 1200 m, 27 June 1956, J. L. Gressitt [1&amp;male;, ZFMK, ZFMKDIP 00011904].
description: Published as part of <i>Mengual, Ximo, 2016, A taxonomic revision of the genus Asiobaccha Violovitsh (Diptera: Syrphidae), pp. 2585-2645 in Journal of Natural History 50</i> on pages 2592-2594, DOI: 10.1080/00222933.2016.1206634, http://zenodo.org/record/3994636
description: {"references": ["Brown RW 1956. Composition of scientific words a manual of methods and a lexicon of materials for the practice of logotechnics. Baltimore: Published by the author."]}