Labomimus consimilis, Yin, 2019

Yin, Zi-Wei, 2019, Two new species and new records of the Pselaphodes - complex of genera from China (Coleoptera: Staphylinidae: Pselaphinae), Revue suisse de Zoologie 126 (2), pp. 197-202 : 197-200

Labomimus consimilis sp. nov.

Figs 1A , 2 A-J

Type material: Holotype; IOZ(E)2058770; ♂; CHINA, ‘ MD ḄȒBdzẁƁüẘứ, 2016.VI.17 D, 720 m, N° 29.2973, E° 95.2534, Ẓợ ^: ṃừǿ ( China : Xizang, Motuo County, near Ya-Rang Power Station , Hong-Bin Liang leg.)’ ( IZCAS).

Type locality: Motuo County, Xizang, China.

Diagnosis: Male: Body length about 2.6 mm. Antennomere 9 strongly dilated, antennomere 10 subtrapezoidal, antennomere 11 curved. Metaventral processes short and broad, narrowed at apex. Protrochanters with sharp, thin ventral spine; mesotrochanters with small ventral spine. Median lobe of aedeagus asymmetric, strongly narrowed apically; parameres elongate and slender; endophallus comprised of one sclerotized plate bearing two elongate branches. Female: unknown.

Description: Male ( Fig. 1A ). Body reddish brown, body length 2.64 mm. Head slightly broader than long, length from anterior clypeal margin to base 0.50 mm, width across eyes 0.52 mm; each eye composed of about 40 facets; with rather short ocular canthus. Antennomeres 9-11 forming distinct club ( Fig. 2A ); antennomere 9 strongly dilated, its dorsal surface broadly impressed at apical half, with two tufts of setae, antennomere 10 expanded, sub-trapezoidal, antennomere 11 elongate, its mesal surface strongly impressed at basal half. Maxillary palpomeres 2-4 roundly broadened on lateral margin. Pronotum ( Fig. 2B ) as long as wide, length along midline and maximum width 0.49 mm, anterolateral margins rounded, narrowing toward apex at apical 1/3. Elytra strongly transverse, length along suture 0.77 mm, maximum width 1.31 mm. Metaventral processes ( Fig. 2C ) relatively short, roundly narrowed at apex. Protrochanters ( Fig. 2D ) with thin, sharp ventral spine, profemora simple; mesotrochanters ( Fig. 2E ) with short ventral spine, mesofemora simple; metatrochanters and metafemora ( Fig. 2F ) simple. Abdomen broad at base and narrowing apically, length of dorsally visible part along midline 0.88 mm, maximum width 1.02 mm. Semi-membranous sternite IX ( Fig. 2G ) elongate. Length of aedeagus ( Figs 2 H-J) 0.47 mm; median lobe asymmetric, strongly narrowing apically; parameres elongate and slender, apices bent ventrally; endophallus composed of one sclerotized plate bearing two elongate branches.

Female. Unknown.

Comparative notes: The male of Labomimus consimilis is most similar to those of L. qiujianyuae Zhang, Li & Yin, 2019 from Xizang, and L. wuchaoi Zhang, Li & Yin, 2019 from Yunnan in sharing a curved antennomere 11, and a dilated antennomere 9 bearing tufted setae on the dorsal surface. It differs from L. qiujianyuae in the expanded, sub-trapezoidal antennomere 10 (antennomere 10 elongate and subcylindrical in L. qiujianyuae ), the much shorter metaventral processes, the spinose protrochanter (protrochanter simple in L. qiujianyuae ), and the much narrower apex of the median lobe and relatively much longer parameres of the aedeagus; from L. wuchaoi in the much smaller body size (2.64 mm vs. 3.26- 3.34 mm), the more elongate antennomere 9, the shorter metaventral processes, and the narrowed apex of the aedeagal median lobe (in L. wuchaoi , the aedeagus has the median lobe with a broad apex that is strongly impressed at the anterior margin).

Distribution: China: Xizang.

Etymology: The specific epithet ‘ consimilis ’ (very similar) is an adjective referring to the morphological resemblance of the new species to the two related congeners.

Figures

Fig 1. Male habitus of Labomimus consimilis sp. nov. (A) and Pselaphodes lianghongbini sp. nov. (B). Scale bars: 1 mm.

Fig 2. Male diagnostic features of Labomimus consimilis sp. nov. (A) Antennal club. (B) Pronotum. (C) Metaventral process, lateral. (D) Protrochanter and profemur. (E) Mesotrochanter and mesofemur. (F) Metatrochanter and metafemur. (G) Sternite IX. (H-J) Aedeagus, dorsal (H), lateral (I), and ventral (J). Scale bars: all 0.2 mm, except 0.1 mm in G.