Orsunius granulosissimus, Assing, 2015
publication ID |
https://doi.org/ 10.5281/zenodo.13146652 |
persistent identifier |
https://treatment.plazi.org/id/986D8C66-E45B-FF98-CC8F-B1F9FDD8FB5A |
treatment provided by |
Felipe |
scientific name |
Orsunius granulosissimus |
status |
sp. nov. |
Orsunius granulosissimus View in CoL nov.sp. ( Figs 12-21 View Figs 12-20 View Figs 21-29 )
T y p e m a t e r i a l: Holotype 3: " CHINA [16] - Yunnan, valley S Gejiu, field margin, 23°08'53''N, 103°10'58''E, 1250 m, 21. VIII.2014, V. Assing / Holotypus 3 Orsunius granulosissimus sp.n. det. V. Assing 2015" (cAss) GoogleMaps . Paratypes: 13, 4♀♀ [partly slightly teneral]: same data as holotype (cAss) GoogleMaps ; 2♀♀: same data, but leg. Schülke (cSch) GoogleMaps ; 1♀: " CHINA [15] - Yunnan, valley S Gejiu, road margin, 23°08'38''N, 103°11'42''E, 1010 m, 21. VIII.2014, V. Assing " (cAss) GoogleMaps .
E t y m o l o g y: The specific epithet is the superlative of the Latin adjective granulosus and alludes to the strongly granulose punctation of the head and pronotum.
D e s c r i p t i o n: Body length 4.6-5.4 mm; length of forebody 2.5-2.7 mm. Coloration: body dark-brown to blackish-brown; legs brown; antennae brown with the apical antennomeres gradually paler.
Head ( Figs 12-13 View Figs 12-20 ) more or less distinctly wedge-shaped (dilated posteriad) and strongly transverse, approximately 1.35 times as broad as long; posterior angles rather marked; posterior margin weakly concave, nearly straight; punctation strongly granulose. Ventral aspect with coarse non-granulose punctation and without gular sutures ( Fig. 14 View Figs 12-20 ). Eyes moderately large and moderately bulging, slightly shorter than postocular portion in dorsal view. Antennae 1.3-1.4 mm long; preapical antennomeres moderately transverse. Anterior margin of labrum ( Fig. 14 View Figs 12-20 ) with small concave excision of somewhat variable depth in the middle. Right mandible ( Fig. 14 View Figs 12-20 ) with three large molar teeth, and with or without an additional minute tooth; maxilla and labium as in Figs 15 View Figs 12-20 and 21 View Figs 21-29 .
Pronotum ( Figs 13, 16 View Figs 12-20 ) distinctly transverse, 1.20-1.25 times as wide as long and approximately 1.1 times as broad as head; posterior angles rounded, weakly marked; punctation strongly granulose and not confluent, similar to that of head; midline with or without rudiment of a narrow impunctate band posteriorly; interstices without microsculpture. Prosternum obtusely keeled.
Elytra ( Fig. 12 View Figs 12-20 ) approximately as long as pronotum, with conspicuously long and rather erect dark pubescence; punctation moderately fine and very dense; interstices without microsculpture. Hind wings present. Protarsomeres I-IV not dilated in females, very weakly dilated in males. Metatarsomere I slender and elongated, approximately as long as the combined length of II and III.
Abdomen narrower than elytra; punctation fine and dense, slightly less dense on tergites VII and VIII; interstices without distinct microreticulation; posterior margin of tergite VII with palisade fringe.
3: sternite VII ( Fig. 17 View Figs 12-20 ) with very weakly concave posterior margin, otherwise unmodified; sternite VIII ( Fig. 18 View Figs 12-20 ) distinctly oblong, posterior excision small, but distinct; aedeagus ( Figs 19-20 View Figs 12-20 ) 0.58 mm long, ventral process of distinctive shape, apically hook-shaped in lateral view; dorsal plate weakly sclerotized and small; internal sac with a pair of straight and moderately sclerotized internal structures.
C o m p a r a t i v e n o t e s: Orsunius granulossimus is readily distinguished from all previously described Orsunius species by the strongly granulose punctation of the head and pronotum, larger body size, the erect and long pubescence of the elytra, the absence of gular sutures on the ventral aspect of the head, and the distinctive shape of the aedeagus. For characters separating it from the highly similar and evidently closely related syntopic O. confluens see the comparative notes in the following section.
In view of the pronounced differences between this and other previously described Orsunius species, it is with some hesitation that this species is attributed to Orsunius . The possibility that O. granulosissimus and O. confluens may eventually have to be moved to a separate genus cannot be ruled out. On the other hand, in view of the fact that most of the medonine genera and species of the Oriental region have not yet been subject to modern taxonomic studies, it seems appropriate to adopt a conservative approach and attribute these species to Orsunius , based on the similarities in the general morphology of the male primary and secondary sexual characters, the mouthparts, the habitus, and other external characters.
D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: Thespecimenswerecollected in two adjacent localities in the southeast of Yunnan province, Southwest China, by sifting litter and other debris at a field margin and at a road margin at altitudes of 1250
and 1010 m, respectively. In the type locality the species was found together with O. confluens . The paratypes are partly teneral.
T |
Tavera, Department of Geology and Geophysics |
V |
Royal British Columbia Museum - Herbarium |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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