Platyscelis (Platyscelis) acutipenis,

Bai, Xing-Long & Ren, Guo-Dong, 2019, Revision of the genus Platyscelis Latreille, 1818 from China (Coleoptera: Tenebrionidae: Platyscelidini), Zootaxa 4609 (1), pp. 101-126: 103-106

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Platyscelis (Platyscelis) acutipenis

sp. nov.

Platyscelis (Platyscelis) acutipenis  sp. nov.

( Figs. 1View FIGURES 1–2, 5–6View FIGURES 5–20, 37View FIGURES 37–38, 39–40View FIGURES 39–44)

Diagnosis. This new species is similar to Platyscelis (Platyscelis) freyi Kaszab, 1940  , but can be distinguished from the latter by the following characters: (1) elytral surface with short thick setae (long in P. freyi  ); (2) metatibiae curved, wide and flat (straight and narrow in P. freyi  ); (3) parameres narrowing towards apex straightly, outer margins with long and sharp hooks at apex, apex curved to dorsal side in lateral view (arcuately, extremely weak, not curved in P. freyi  ).

Description. Body black, weakly shining.

Male ( Figs. 1View FIGURES 1–2, 5–6View FIGURES 5–20, 37View FIGURES 37–38, 39View FIGURES 39–44). Anterior margin of frontoclypeus straight, surface with dense and moderately coarse punctures. Frons and genae weakly convex, with punctures dense and coarse. Eyes transverse, anterior margin shallowly emarginate. Antennae ( Fig. 1View FIGURES 1–2: B) nearly reaching base of pronotum, 2nd to 8th antennomeres cylindrical and thicker at apex, 9th to 10th almost spherical, and 11th sharped-oval. Length (width) ratio of 2nd to 11th antennal segments 25 (19): 67 (21): 37 (22): 36 (20): 38 (20): 35 (21): 36 (26): 31 (27): 31 (27): 39 (27).

Pronotum ( Fig. 1View FIGURES 1–2: A) transverse and convex, widest at base, 1.6 times as wide as long, 2.2 times as wide as head. Lateral margins arcuately narrowing toward apex. Ratio of width at anterior margin to basal 26: 50. Anterior margin nearly straight and posterior one sinuate. Anterior angles obtuse and posterior ones rectangular. Lateral margins edged in anterior margin and posterior one not edged, entire lateral margins edged, widely depressed from base to middle. Punctures fine and dense on disc but extremely dense and coarse, and merged partially at sides. Prothoracic hypomera with dense wrinkles, granule and sparse yellow setae. Prosternum before procoxae with yellow setae, prosternal process projecting beyond level of procoxae, sharp at apex in lateral view. Mesoventrite with punctures and yellow setae.

Elytra oval and weak convex, base moderately wider than pronotum and widest at middle, 1.1 times as long as wide and 1.2 times as wide as pronotum. Surface with short thick setae, traces of longitudinal carinae and sparse yellow soft setae, without punctures. Lateral carina nearly visible completely in dorsal view and almost reaching sutural angle.

Abdomen with short sparse yellow setae, not depressed at middle of 1st and 2nd ventrites.

Profemora with sparse punctures and yellow setae. Protibiae ( Fig. 1View FIGURES 1–2: D) gradually widened towards apex and curved at inner side, underside concave at apex and apical margin foliate extended, inner side with dense yellow hairbrush at apex. Protarsi ( Fig. 1View FIGURES 1–2: C) moderately widened but narrower than apex of protibiae. Meso- and metafemora longer than profemora. Mesotibiae ( Fig. 1View FIGURES 1–2: E) gradually widened toward apex, with rufous strong setae. Mesotarsi ( Fig. 1View FIGURES 1–2: F) weakly widened and narrower than apex of mesotibiae. Metatibiae ( Fig. 1View FIGURES 1–2: G) curved, wide and flat, with rufous strong setae. Length (width) ratio of pro-, meso- and metafemora 26 (9): 28 (8): 34 (10), that of corresponding tibiae 25 (8): 26 (6): 37 (6), and protarsi 26 (27): 32 (49): 26 (42): 20 (24): 70 (24), mesotarsi 51 (30): 41 (38): 31 (30): 27 (24): 74 (22), metatarsi ( Fig. 1View FIGURES 1–2: H) 115 (30): 54 (29): 42 (26): 86 (27).

Aedeagus ( Figs. 1View FIGURES 1–2: I–K, 5–6) 3.4 mm long and 1.0 mm wide. Parameres 0.9 mm long and 0.6 mm wide, widest at base and narrowing toward apex straightly, outer margins with long and sharp hooks at apex, apex curved to dorsal side in lateral view.

Female ( Fig. 40View FIGURES 39–44). Body wider, antennae not reaching base of pronotum, pro- and mesotarsi not widened, other characters similar to male.

Measurements. Body length: ♂ 11.1–11.5 mm, ♀ 11.3–11.8 mm and width: ♂ 6.0– 6.3 mm, ♀ 6.7–6.8 mm.

Type material. Holotype: ♂ ( MHBU), CHINA: Ningxia: Fengtai Forest Farm, Longde , 13–14.VII.2009, Xin-Pu Wang & Xiao-Lin Zhao leg  . Paratypes: 1♂, 1♀ ( MHBU), same data as holotype; 1♂, 1♀ ( MHBU), Fengtai Forest Farm, Longde , 30.VI.2008, Xin-Pu Wang & Xiao-Li Liu leg.  ; Gansu: 1♂ ( MHBU), Dingxi , VIII.1983, coll. NWAFU 


Distribution. China: Gansu, Ningxia.

Etymology. This species is named derived from sharp hooks present at apex of parameres.