Nargus (Eunargus) celli, Wang, Cheng-Bin, Růžička, Jan & Zhou, Hong-Zhang, 2015

Wang, Cheng-Bin, Růžička, Jan & Zhou, Hong-Zhang, 2015, Nargus (Eunargus) celli sp. nov. (Coleoptera: Leiodidae: Cholevinae: Cholevini), a new species from China, Zootaxa 4012 (3), pp. 570-580 : 576-579

Nargus (Eunargus) celli sp. nov.

( Figs. 2 C; 5A–G; 6A–F)

Type locality. CHINA, Guangxi: Napo, Defu Nature Reserve [ca. 23°17′N 105°47′E], 1400 m.

Type material. Holotype: CHINA, Guangxi: ♂, Napo, Defu Nature Reserve, 1400 m, aspirator, 3– 5.VI.1998, Min Wu leg. (IZ-CAS).

Description. Male. EBL: 4.4 mm. Length of different body parts: HL: AL: PL: ELL = 0.7: 1.8: 1.1: 2.4 mm; width: HW: EW: PW: ELW = 1.0: 0.1: 1.6: 2.0 mm. Proportion of antennomeres from base to tip in Μm (length × width): 181 × 86, 167 × 67, 188 × 66, 146 × 62, 145 × 67, 124 × 72, 155 × 90, 92 × 85, 139 × 100, 139 × 103, 216 × 98.

Habitus ( Fig. 2 C) oval, rather convex and sublustrous. Well pigmented: mostly dark brown; mouthparts, basal two and ultimate antennomeres, protarsi and apex of meso- and metatarsi more or less yellowish. Dorsum continually covered with fine, recumbent, sallow pubescence.

Head retractile, HW / HL = 1.4. Surface covered with fine punctures, separated about 3–5 times of their diameter, interspaces with reticulate microsculpture. Frontoclypeal suture distinct. Clypeus subtrapezoidal, anterior margin substraight. Compound eyes well developed, EW / HW = 0.1. Antennae (Fig. 5A) very slender and very long, AL / HW = 1.8; all antennomeres longer than wide; antennomere 3 distinctly longer than 2; antennomere 6 with length / width = 1.7; antennomere 11 longest, rather elongated.

Pronotum (Fig. 5B) transverse, widest around middle, PW / PL = 1.6. Sides rounded, regularly narrowing forward and backward from the widest point; hind corners absent, completely rounded. Posterior margin shallowly and narrowly emarginate in middle. Surface covered with fine punctures, interspaces with reticulate microsculpture.

Elytra widely oval, widest at about basal 1/3, ELL / EW = 1.2. Sides regularly curved, gradually narrowing from the widest point to apices; apices (Fig. 5E) widely truncated and with inner angle obtusely rounded. Sutural striae present. Surface covered with fine punctures, interspaces with microtrichiae. Metathoracic wings fully developed.

Prolegs thin and slender, with basal three protarsomeres (Fig. 5C) weakly expanded: TW / BTW = 1.1. Protibiae (Fig. 5D) slightly dilated below middle and weakly narrowed towards apex. Profemora wider than protibiae. Mesotibiae slightly curved, mesotarsi simply linear. Metatibiae substraight.

Abdominal ventrite VIII (Fig. 5F) deeply emarginate beside large median protrusion on posterior margin. Genital segment (Fig. 5G) wide and subtriangular, with spiculum gastrale small; genital plate narrow; tergite IX widely rounded ventro-apically.

Aedeagus ( Figs. 6 A–F) with median lobe divided into two laminae: in dorsal view ( Figs. 6 A&D), dorsal lamina extended over entire width of median lobe, abruptly turning to left side at apical part where covered with micro-setae, and bearing ca. 4 long and strong setae on left side above middle; while ventral lamina slender, strongly and transversely reduced, slightly shorter than dorsal lamina, situated at left side. Large tooth of internal sac extremely developed and with two apices, left one short and straight, right one long and turned to right side at apical part in dorsal view. Parameres rather wide and robust, slightly longer than median lobe, each with two apical setae. In lateral view ( Figs. 6 C&F), median lobe strongly bent ventrad and parameres very widened around middle. Internal sac with many minute denticles in basal part.

Female. Unknown.

Affinities. Nargus (Eunargus) celli sp. nov. is easily distinguished from other members in this subgenus by the combination of the following characters: distintly larger body size (4.4 mm) and uniformly dark brown, including elytra; metathoracic wings fully developed; aedeagus with dorsal lamina robust, abruptly turning left in apical part in dorsal view; ventral lamina straight, situated at left side in dorsal view, slightly shorter than dorsal lamina; large tooth of internal sac with two apices, not projected outwards from median lobe; parameres wide and robust, slightly longer than median lobe, and in lateral view very widened around middle.

Etymology. The specific epithet is from the name of “Cell”, a fictional character, an insect-like humanoid in the Dragon Ball manga series created by Akira Toriyama.

Distribution. China (Guangxi) ( Fig. 1 ).

Figures

FIGURE 1. Distribution map of Nargus (Eunargus) species.

FIGURE 2. Nargus (Eunargus) franki Perreau, 1997: A, habitus ♂ (dorsal view; from Fujian); B, habitus ♀ (dorsal view; from Sichuan). Nargus (Eunargus) celli sp. nov.: C, habitus ♂ (dorsal view). Scales: 1 mm.

FIGURE 6. Nargus (Eunargus) celli sp. nov.: A & D, aedeagus (dorsal view); B & E, aedeagus (ventral view); C & F, aedeagus (lateral view). Scales: 0.1 mm.