Thyestetha splendens Eberle & Riedel, sp. n.
Creators: name: Eberle, Jonas
name: Tänzler, Rene
name: Riedel, Alexander
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Curculionidae
Thyestetha
Thyestetha splendens

description: Thyestetha splendens Eberle & Riedel sp. n.
(Figs. 9, 18, 36, 53–54, 72)
Diagnosis. Prothorax with bluish purple lustre, elytra with coppery purple lustre (Figs. 9, 18). Pronotum and elytra largely glabrous. Rostral canal glabrous. Aedeagus (Figs. 53–54) with apex rounded; transfer apparatus in dorsal view Y-shaped.
Description. Holotype, male. Length. Pronotum + elytra: 2.8 mm. Color. Antenna and tarsi ferruginous; remainder black; prothorax with bluish purple lustre, elytra with coppery purple lustre. Habitus subglobose, in dorsal view constricted between pronotum and elytra (Fig. 9); profile dorsally constricted between pronotum and elytron (Fig. 18).
Rostrum 5.3 X as long as wide at base. Head. Vertex slightly punctate, with distinct pit between eyes.
Prothorax 1.4 X wider than long; disc in anterior 1/4 densely punctate with very small punctures, remainder subglabrous with minute punctures (except for row of coarse punctures along base); sides smooth except few indistinct punctures ventrally; postocular lobe weakly developed; inner surface of rostral canal with scattered long setae; marginal carina externally along edge with sparse slender scales.
Elytra 0.8 X longer than wide; sides rounded; apex slightly extended, jointly rounded; striae mostly effaced, striae 7, 8 and 9 apically weakly impressed; elytral apex obscurely punctate. Metanepisternum 2.7 X wider than high.
Thoracic venter. Meso- and metaventrite subglabrous; ventral rim of mesothoracic receptacle with sparse thin scales; Metaventrite submedially flat. Procoxa densely punctate, with long slender scales; mesocoxa sparsely squamose; metacoxa glabrous; trochanter with sparse, coarse punctures containing slender scales. Distance between mesocoxae about 1.5 X width of mesocoxa.
Legs. Femora sparsely punctate, apically slightly denser, scales slender; meso- and metafemur dorsally with slightly broader scales, dorsal squamose line of metafemur moderately dense; anteroventral ridges relatively weak. Metafemur in apical third with slightly protruding posteroventral ridge.
Abdomen. Ventrites glabrous except ventrite 1 laterally with few thin scales.
Terminalia. Aedeagus (Figs. 53, 54). Apex rounded, moderately curved ventrad; lateral orificial sclerites medium-sized, outer portion ca. as long as inner portion; anterior median orificial sclerite simple between 2nd and 3rd fold (Fig. 36). Anterior end of transfer apparatus curved dorsad; in dorsal view Y-shaped. Sclerotized part of ventral membrane extending proximad 1.56 X length of aedeagal body from insertion of apodemes.
Allotype, female. Same as holotype except: Rostrum 6.29 X longer than wide. Prothorax 1.21 X longer than wide. Elytra 0.92 X longer than wide. Terminalia. Hemisternites of ovipositor 6.36 X longer than wide. Tergite VII 1.88 X longer than wide. Tergite VIII 2.22 X longer than wide. Bursal sclerite at insertion of spermathecal duct distinctly sclerotized.
Intraspecific variation. Length, males 2.8–3.7 mm (n=2, x = 3.3 mm), females 3.1–4.3 mm (n=2, x = 3.7 mm). Lustre of prontum and elytra weak in some specimens. Scales at rostral base smaller or larger, punctures on apical margin of prothorax more distinct in holotype than in other specimens.
Etymology. The epithet is based on the participle of the Latin verb splendere (shine) and refers to the bright coloration.
Material examined (2 males, 2 females). Male, holotype: PAPUA NEW GUINEA, Morobe Prov., ca. 10 km S Garaina, Saureri, 1400–1700m, 22.III.1998 (SMNK). Paratypes: PAPUA NEW GUINEA, Morobe Prov., ca. 10 km S Garaina, Saurei: 1 male: 1600–1800m, 24.III.1998 (ARC); 1 female (allotype), 1600–1800m, 24–25.III.1998 (SMNK); 1 male: 1550–1700m, 27.III.1998 (ARC).
Distribution (Fig. 72). Morobe Prov. (Garaina). Elevation: ca. 1600 m.
description: Published as part of Eberle, Jonas, Tänzler, Rene & Riedel, Alexander, 2012, Revision and phylogenetic analysis of the Papuan weevil genus Thyestetha Pascoe (Coleoptera, Curculionidae, Cryptorhynchinae), pp. 1-28 in Zootaxa 3355 (1) on pages 23-24, DOI: 10.11646/zootaxa.3355.1.1, http://zenodo.org/record/214456