Sinocatops ruzickai, Wang & Zhou, 2016

Wang, Cheng-Bin & Zhou, Hong-Zhang, 2016, Sinocatops gen. nov., an apterous genus of Cholevini (Coleoptera: Leiodidae: Cholevinae) from China, with emphasis on differences with allied Rybinskiella Reitter, 1906, Zootaxa 4085 (3), pp. 393-415 : 395-407

Sinocatops ruzickai sp. nov.

( Figs. 1A, B ; 2A, B; 3A–F; 4A; 5A; 6A–C; 7A; 8A; 9A; 10A–K; 11A–I)

Type material. Holotype: CHINA, Sichuan: ♂, Wolong, Wuyipeng, Erdaoping, 2945–3055 m, virgin fir forest, pitfall trap, 30.VII–15.VIII.2004, Xiao-Dong Yu leg. (IZ-CAS) . Paratypes: 5♂♂, 8♀♀, same data as holotype (IZ-CAS) ; 1♀, same data as holotype except: secondary birch forest, 29.IV–2.V.2004 (IZ-CAS) ; 1♂, same data as holotype except: secondary birch forest, 30.V–2.VI.2004 (IZ-CAS) ; 2♂♂, 10♀♀, same data as holotype except: secondary birch forest, 15–30.VI.2004 (IZ-CAS) ; 1♂, 1♀, same data as previous except: forest edge of virgin fir (IZ-CAS) ; 2♀♀, same data as holotype except: 2535 m, mixed forest, 29.VI–14.VII.2004 (IZ-CAS) ; 3♂♂, 14♀♀, same data as holotype except: 2580–3055 m, secondary birch forest, 29.VI–15.VII.2004 (IZ-CAS) ; 4♀♀, same data as previous except: virgin fir forest (IZ-CAS) ; 1♀, same data as holotype except: forest edge of virgin fir, 15– 30.VII.2004 (IZ-CAS) ; 1♀, same data as previous except: secondary birch forest (IZ-CAS) ; 1♂, same data as holotype except: 2600–2650 m, Rhododendron forest, 14–29.VIII.2004 (IZ-CAS) ; 1♀, same data as previous except: mixed forest (IZ-CAS) ; 2♀♀, same data as holotype except: 2710–3045 m, 14–30.VIII.2004 (IZ-CAS) ; 2♀♀, same data as holotype except: 30.VIII–15.IX.2004 (IZ-CAS).

Description. Male. EBL: 3.20 mm. Length of different body parts: HL: AL: PL: ELL = 0.54: 1.52: 0.82: 1.75 mm; width: HW: EW: PW: ELW = 0.71: 0.07: 1.15: 1.21 mm. Proportion of antennomeres from base to tip in µm (length × width): 166 × 72, 145 × 61, 134 × 64, 123 × 63, 112 × 69, 104 × 75, 127 × 90, 84 × 80, 112 × 105, 106 × 107, 186 × 98. (Measurements are mean values based on 5 specimens).

Sinocatops Rybinskiella

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/ "’ (= +# /2# (0 2 $# Habitus ( Fig. 1A ; 2A) elongate and rather narrow, regularly convex and sublustrous; well pigmented: mostly dark brown; mouthparts, basal five antennomeres, protarsi, apical parts of meso- and metatarsi, and elytral apex somewhat paler. Dorsum continually clothed with fine, recumbent and sallow pubescence.

Head wider than long, HW/HL = 1.31. Surface covered with large, coarse and sparse punctures, separated about 2.0–4.0 times of their diameter, interspaces smooth. Clypeofrontal suture absent. Clypeus with straight anterior margin. Compound eye built from ca. 62–66 ommatidia, EW/HW = 0.10. Antennae ( Fig. 10A ) long and slender, AL/HW = 2.13; all antennomeres longer than wide at different levels, except 8th and 10th almost as long as wide; 3rd slightly shorter than 2nd; 11th longest, elongated pear-shape. Cervical sclerite with length/width = 1.79 in medial view ( Fig. 4A ).

Pronotum ( Fig. 10B ) subcampanulate and transverse, widest around middle, PW/PL = 1.39. Sides regularly narrowed forward from widest and weakly constricted before hind corners. Hind corners rounded, protruding backward. Posterior margin bisinuate, emarginate behind hind corners. Surface covered with fine punctures, interspaces smooth, without depression in each latero-basal area.

Elytra oval, tightly fused with each other (can be separated with some strength), widest at about basal 2/7, ELL/EW = 1.44. Sides regularly curved, evenly narrowing from widest to apices; apices narrowly rounded ( Fig. 10G ). Sutural striae absent. Surface covered with fine punctures, interspaces smooth. Metathoracic wings absent.

Prolegs slender, with basal three protarsomeres ( Fig. 10C ) strongly expanded: TW/BTW = 1.12. Protibiae ( Fig. 10E ) simply and gradually expanded towards apex. Profemora without tubercle on inner side. Mesotibiae with inner margin gently sinuate, 1 st mesotarsomere ( Fig. 7A ) moderately expanded. Metatibiae straight.

Abdominal ventrite VIII ( Fig. 10I ) with middle indentation at anterior edge, while elongated posteriorly and distinctly notched at posterior edge. Genital segment ( Fig. 10J ) with short spiculum gastrale, not expanded dorsoventrally ( Fig. 10K ); tergite IX rounded ventro-apically.

Aedeagus ( Fig. 11A, B ) with median lobe long and moderately wide (length/width = 5.74), almost parallel below preapical part which inconspicuously expanded, then narrowed apically and terminated to a shortly round knob in dorsal view; parameres filiform, reached about apical 2/5 of median lobe, each with two apical setae; basal lama short; ventral operculum with two lobes rounded at apical edge. In lateral view, median lobe thick, substraight above curved base and abruptly flatted at apex ( Fig. 11C ). Internal sac ( Fig. 11A–C ) with a cluster of spines at median of apex, following two spine rows convergent apically and two rows of phanerae, and a pair of curved large teeth in basal region.

Female. Wider and chubbier than male in general appearance ( Fig. 1B ; 2B), and also can be distinguished from following characteristics: pro- & mesotarsi simply linear ( Fig. 10D ); protibiae ( Fig. 10F ) narrower; elytral apices ( Fig. 10H ) acuminated; ventrite VII ( Fig. 11D ) with a small subtriangular tooth at middle of posterior edge; tergite VIII ( Fig. 11E ) subtrapezoidal, sides gently curved, without well-defined desclerotized area; ventrite VIII ( Fig. 11F ) shallowly emarginate at posterior edge, and spiculum ventrale relatively narrow; tergite IX ( Fig. 11G ) rounded at posterior edge, with four strong setae and numerous other finer setae posteriorly; ventral sclerite ( Fig. 11I ) slender and ligulate, without sensillae; valvifer ( Fig. 11G, H ) with 1 lateral seta; coxite ( Fig. 11G, H ) with 3 subapical, 1 lateral and 1 basolateral setae; stylus ( Fig. 11G, H ) minute, cylindrical, with 1 long seta.

Etymology. The specific epithet is dedicated to Dr. Jan Růžička (Czech University of Life Sciences, Prague, Czech Republic), a famous specialist on Agyrtidae , Silphidae and Leiodidae , for his kind help to our study. Distribution. China (Sichuan).

Figures

FIGURE 1. Sinocatops ruzickai sp. nov.: habitus (dorsal view): A, ♂; B, ♀. Scales: 1 mm.

FIGURE 4. Cervical sclerites ♂ (medial view). A, Sinocatops ruzickai sp. nov.; B, Rybinskiella (Sintania) bodoana Reitter, 1913; C, Rybinskiella (s. str.) magnifica (Rybiński, 1902). Scales: 0.1 mm.

FIGURE 7. Mesotarsi ♂ (dorsal view). A, Sinocatops ruzickai sp. nov.; B, Rybinskiella (Sintania) bodoana Reitter, 1913; C, Rybinskiella (s. str.) magnifica (Rybiński, 1902). Scales: 0.1 mm.

FIGURE 10. Sinocatops ruzickai sp. nov.: A, antenna ♂ (dorsal view); B, pronotum ♂ (dorsal view); C, protarsus ♂ (dorsal view); D, protarsus ♀ (dorsal view); E, protibia and profemur ♂ (dorsal view); F, protibia and profemur ♀ (dorsal view); G, elytral apex ♂ (dorsoapical view); H, elytral apex ♀ (dorsoapical view); I, ventrite VIII ♂ (ventral view); J, genital segment ♂ (ventral view); K, genital segment ♂ (lateral view). Scales: 0.1 mm.

FIGURE 11. Sinocatops ruzickai sp. nov.: A, aedeagus (dorsal view); B, aedeagus (ventral view); C, aedeagus (lateral view); D, ventrite VII ♀ (ventral view); E, tergite VIII ♀ (dorsal view); F, ventrite VIII ♀ (ventral view); G, genital segment and ovipositor (dorsal view); H, genital segment and ovipositor (ventral view); I, ventral sclerite (ventral view). Scales: 0.1 mm.