Cyllodes quinquemaculatus, Liu & Yang & Huang, 2016

Liu, Meike, Yang, Xingke & Huang, Min, 2016, One new species and one newly recorded species of Cyllodes Erichson from China (Coleoptera: Nitidulidae: Nitidulinae), Zootaxa 4079 (3), pp. 345-356 : 353-355

Cyllodes quinquemaculatus sp. n.

( Figs. 17–24 )

Description. Length 3.7 mm, width 2.9 mm. Pronotum reddish-brown with three black spots; elytra black with two reddish-brown spots. Dorsum glossy and shining, surface sculpture consisting of minute punctures with microreticulate interspaces ( Figs. 17, 18 ).

Head with anterior half black and posterior half reddish-brown. Surface punctures irregular, circular or crescent shaped, about 1.0–1.5× eye facet width in diameter, 1.5 puncture diameters apart. Eyes prominent, finely faceted, interfacetal setae absent. Antennal grooves distinctly margined and slightly deepened, slightly convergent posteriorly, the shortest distance between them about 2× width of mentum. Antenna with funicle reddish-brown and 3-segmented club black. Club about 0.8× length of remaining antennomeres combined. Scape 4.0× longer than pedicel. Pedicel small, 0.7× as long as segment 3 ( Fig. 19 ). Apical edge of mandibles with four teeth; molar region with large transverse ridges; prostheca with dense setal brush ( Fig. 20 ). Terminal segment of maxillary palpi elongate, nearly 2× longer than remaining palpomeres combined; lacinia with short dense brown setal brush apically and along anterior 1/3 laterally ( Fig. 21 ). Terminal segment of labial palpi longer than wide, slightly narrowed apically. Mentum subpentagonal and angulate at medial anterior margin, with only a few faint minute punctures along posteriorly, interspaces smooth.

Pronotum somewhat transverse (L:W = 1.0:2.4), widest near posterior angles; punctures slightly smaller than those on vertex, surface sculpture smooth and slightly granular laterally and posteriorly. Scutellar shield semicircular. Prosternum with space between coxae and anterior margin about 1.5× width of procoxal process between coxae. Prosternal process slightly expanded posterior to procoxae, with a longitudinal carina. Mesoventrite with punctation similar to that of pronotum, surface sculpturing granular with some faint microreticulation. Mesoventrite distinctly carinate and on more dorsal plane than metaventrite and prosternum; often obscured by prosternal process. Meso-metaventral junction distinctly procurved. Metaventrite overall transverse (W:L = 1.0:3.0); metaventral disc sculpturing granular with small punctures 2.5× their diameter apart. Elytra steeply sloping, covering pygidium completely; some serially punctate striae visible but other punctures distributed randomly; sculpturing granular to smooth, glabrous; punctures similar to those of pronotum while interspaces between them slightly wider than on pronotum.

Distance between mesocoxae widest, 0.4× length of antennal club, slightly wider than distance between metacoxae, 3.0× wider than distance between procoxae. Each femora canaliculate for reception of tibiae; widest near middle. Profemur 2.5×, mesofemur 1.5×, and metafemur about 2× width of corresponding tibia. Tibia wide and flat (W:L = 1.0:2.0). Protibia with distinct stout spines along outer edge and two unequal apical spurs, as wide as antennal club. Mesotibia with row of short blunt spines along apical margin and two obvious apical spurs; thick stiff seta-like spines along lateral, apical and distal 2/3 of inner margin. Metatibial armature similar to that of mesotibia, slightly wider than protibia. Protarsus 0.8× width of protibia; mesotarsus as wide as mesotibia; metatarsus slightly narrower than metatibia. Claws simple.

Tegmen of male genitalia short and broad (L:W = 1.5:1.0) with apex rounded, setae dense and long around apical margin, with two distinct apico-lateral tufts present ( Fig. 22 ). Median lobe with apex slightly protuberant and with paired elongate fingerlike projections near middle part ( Fig. 23 ). Female genitalia weakly sclerotized, as observed in other Cyllodes species, with gonocoxites fused along midline, broadly widened at base (L:W = 1.2:1.0) ( Fig. 24 ).

Diagnosis. The new species is similar to Cyllodes bifascies , but can be distinguished the latter by the following characters: 1) three spots on pronotum and two spots on elytra; 2) apical edge of mandibles present four dentate cuttings; 3) mesoventrite deeply concave for reception of the prosternal process; 4) the ratio of the length of scape and pedicel is 4.0:1.0, larger than other species of Cyllodes ; 5) male genitalia with tegmen rounded apically and median lobe present two obvious elongate lateral fingerlike projections touched to each other near middle part.

Material examined. Holotype. ♂, China: Yunnan, Xishuangbanna, Jinghong , Xiaomengyang , 850m a.s.l., 03- V-1983, Панфилов ( IZAS) . Paratypes. (1♂, 1♀). 1♂, China: Yunnan, Xishuangbanna, Menga , 1050–1080m a.s.l., 20-VIII-1958, Shuyong WANG ( IZAS) ; 1♀, China: Yunnan, Xishuangbanna, Damenglong , 650m a.s.l., 17- IV-1983, Fuji PU ( IZAS).

Etymology. The specific epithet is derived from the combined Latin words “quinque” and “maculatus” referring to the five spots on its body.

Distribution. China (Yunnan).

Figures

FIGURES 17 – 18. Cyllodes quinquemaculatus sp. n.: 17. Male habitus, dorsal view; 18. Male habitus, ventral view. Scale bar = 0.50 mm.

FIGURES 19 – 21. Cyllodes quinquemaculatus sp. n.: 19. Right antenna; 20. Right mandible; 21. Right maxilla. Scale bar = 0.20 mm.

FIGURES 22 – 24. Cyllodes quinquemaculatus sp. n.: 22. Male tegmen; 23. Male median lobe of aedeagus; 24. Female ovipositor. Scale bar = 0.10 mm.