Carpophilus (Myothorax) nepos Murray, 1864

Chen, Xiaoxiao, Hui, Ziyan & Huang, Min, 2020, One new species and one newly recorded species in the subgenus Myothorax Murray 1864 from China (Coleoptera: Nitidulidae: Carpophilinae: Carpophilus), Zootaxa 4822 (3), pp. 434-438 : 436-438

Carpophilus (Myothorax) nepos Murray, 1864

(Figs. 12–21)

Carpophilus (Myothorax) nepos Murray 1864: 381 .

Carpophilus (Myothorax) freemani Dobson 1956: 41 .

Specimens examined. 1♂, Guangxi Zhuang Autonomous Region, Chongzuo City, Pingxiang City , Daqing Mountain, 17-VI-2018, Ziyan Hui ( NWAFU) .

Redescription (Male). Length 2.5 mm, width 1.1 mm, height 0.6 mm. Body oblong, slightly convex dorsally and ventrally. Dorsal surface brown with head darker, lateral margins of pronotum brighter, elytra yellowish brown with small black spots posterior to scutellar shield and posterior margin dark brown, ventral surface yellowishbrown with metaventrite dark brown. Dorsal and ventral surface shining. with recumbent and conspicuous grayish yellow setae (Figs. 12–13).

Head with fine punctures, subequal in diameter to eye facet; interspaces smooth, 1.0–1.5 diameters apart. Pronotum with sparse punctures similar to punctures on head, 2.0–4.0 diameters apart. Disc and basal part of scutellar shield with sparse punctures smaller than those on pronotum. Elytra with sparse punctures similar to punctures on pronotum and larger punctures laterally. Prosternum with large and irregular punctures adjacent to one another, causing the surface to appear pleated. Mesoventrite with fine punctures, subequal to eye facet, interspaces smooth, separated by 2 diameters. Abdominal ventrite 1, posterior margin of ventrites 2–3, posterior two-thirds of ventrite 4 and hypopygidium with sparse and fine punctures.

Head obviously wider than long. Lobes of labrum clearly exposed, with deep excision ( Fig. 14 ). Mandible with one raised apical tooth and one obviously raised subapical tooth ( Fig. 16 ). Antennae about 0.8× as long as head width, antennomere 2 subequal to 3, clavate; antennomere 8 disc-like; antennal club compact, obviously shorter than one-half length of antennomeres 1–8 combined ( Fig. 21 ). Pronotal disc convex with width 1.4× length, anterior margin truncate, posterior margin subtruncate, lateral sides arched, slightly narrowed from middle to anterior margin; anterior and posterior angles blunt. Scutellar shield heart-shaped. Elytra shorter than combined width, posterior margin slightly oblique, truncate. Pygidium subtruncate apically.

Terminal maxillary palpomere elongate and conical ( Fig. 15 ). Terminal labial palpomere widening toward truncate apex. Mentum pentagonal. Antennal grooves strongly convergent posterior to mentum. Prosternum not carinate, its process slightly carinate between procoxae, slightly widening posterior to procoxae, straight, narrow apically ( Fig. 17 ). Mesoventrite without median ridge. Submesocoxal line deviating from posterior edge of coxal cavity two-thirds of the way to lateral edge and arcuately approaching anterior two-fifths of metanepisternum. Metaventrite weakly concave along midline. Distance between mesocoxae subequal to that between procoxae, slightly shorter than distance between metacoxae. All tibiae subtriangular, with prominent outer subapical angles, slightly wider than antennal club width. Tarsi distinctly narrower than tibiae, claws simple.

Tegmen well sclerotized, truncated apically, outer margin membranous and transparent in apical half; inner margins straight and outer margins slightly convergent in apical half ( Figs. 18–19 ). Sternite VIII transverse, medial process slightly emarginate apically, lateral process pointed and not exceeding the horizontal position of the medial process ( Fig. 20 ).

Bionomics. Specimens examined by the authors were collected from rotten jackfruit.

Distribution. China (Guangxi); widespread in other parts of Asia, Europe, and Africa.

Figures

FIGURES 13–23. Carpophilus (Myothorax) nepos Murray, 1864: (12) male habitus, dorsal, (13) male habitus, ventral, (14) labrum, (15) right maxillary palp, dorsal, (16) left mandible, dorsal, (17) prosternal process, (18) tegmen, dorsal, (19) tegmen, lateral, (20) sternite VIII, (21) left antenna, dorsal. Scale bars: 1 mm (Figs. 12–13), 0.1 mm (Figs. 18–20).