Pseudcolenis hoshinai Park & Ahn

Park, Sun-Jae & Ahn, Kee-Jeong, 2007, Two Pseudoliodine genera Dermatohomoeus Hlisnikovský and Pseudcolenis Reitter (Coleoptera: Leiodidae: Leiodinae) in Korea, with a description of Pseudcolenis hoshinai new species, Zootaxa 1427, pp. 49-56 : 53-55

Pseudcolenis hoshinai Park & Ahn , new species

Figs. 2, 5 , 9–11 , 13 , 15, 18

Type series. Holotype, male, labeled as follows: “ KOREA: Jeonbuk Prov., Imsil-gun, Samkye-myeon, Sesim-ri, Gameunsan, 15 IX 2002, M.-H. Kim, ex mushroom; Holotype, Pseudcolenis hoshinai Park and Ahn, Desig. S. -J. Park and K.-J. Ahn 2005”. Deposited in CNUIC, Daejeon. Paratypes, 24; 14 males, 10 females: same data as holotype. Deposited in CNUIC, Daejeon.

Description. Body length about 1.8–2.0 mm (holotype: 1.9 mm). Body convex, glabrous, almost concolorous, brown to dark brown. Antennomeres 1–6 and 11 light brown, 7–10 darker. Body about 1.6 times longer than wide, widest at about basal one fourth of elytra.

Head ( Fig. 2 ) about 1.3 times wider than long, with some fine scattered punctures, very weak dense strigulae present, widest at eyes, sharply narrowed behind eyes. Eyes oval, strongly projected. Mandible asymmetrical, without subapical tooth; prostheca and molar lobe bearing grinding surface present; retinaculum absent. Clypeal line clear. Apical margin of labrum shallowly emarginate, with long and short setae. Antenna ( Fig. 5 ) slender, with antennomeres 7–11 pubescent with long or short setae, others sparser, 3 almost equal to 2 in length, 8 longer than 6.

Pronotum about 1.9 times wider than long, widest at base, weakly punctate, with very weak transverse strigulae as dense as those of head. Elytra about 1.1 times longer than wide, as weakly punctate as pronotum, with transverse strigulae finer and sparser than those of head or pronotum, without rows of punctures, with sutural stria extending to near scutellum. Mesosternum impunctate, finely microreticulate, with a blunt and incomplete medial carina. Mesocoxal cavity distantly separated from mesepimeron; metasternum impunctate, without setae except in median region with some long and short setae, not microreticulate medially, finely microreticulate laterally. Legs ( Figs. 9–11 ) slender, tarsal formula 5-4- 4 in both sexes; protibia with short or long spines along outer and apical margins; male protarsi little more dilated than those of female, meso- and metatarsomere 1 longer than 2–3 combined. Hind wings normal.

Aedeagus ( Figs. 13, 15 ) slender and elongated; median lobe moderately narrowed and pointed apically in ventral aspect, slightly curved ventrally in lateral aspect, apex moderately pointed in lateral aspect, ventral piece divided, with small projections in ventral and lateral aspects, internal sac complex, apex of central piece of internal sac armature slightly curved ventrally in lateral aspect; parameres ( Figs. 13, 15 ) slender, reaching near apex of median lobe, with two long and flexible setae at apex in ventral and lateral aspect.

Spermatheca ( Fig. 18 ) with spermathecal gland, slightly swollen at base.

Distribution. Korea.

Comparative remarks. Pseudcolenis hoshinai is very similar to P. h i l l e r i in body shape and structure of the aedeagus. However, the new species can be distinguished from P. hilleri by having antennomere 6 wider than long, and the central piece of the internal sac armature long and in lateral aspect slightly curved ventrally at apex. In contrast, in P. h i l l e r i antennomere 6 is longer than wide, and the central piece of the internal sac armature is relatively short and in lateral aspect strongly curved ventrally at apex. The new species is also similar to P. flavicollis Daffner, 1988 a from northern India and P. p i c e a ( Hisamatsu, 1964) from Japan in body size and structures of the aedeagus. However, P. hoshinai differs from P. flavicollis in having round-oval body shape (oval in P. flavicollis ). Further, in ventral aspect the apex of the median lobe of P. flavicollis is more sharply pointed than that of P. hoshinai . Pseudcolenis hoshinai differs from P. p i c e a in having very weak transverse strigulae on elytra, while elytra of P. p i c e a have clear transverse strigulae.

Figures

FIGURES 1 – 5. Head (1 – 2) and antenna (3 – 5), dorsal aspect. 1, 3: Dermatohomoeus terrenus (Hisamatsu); 2, 5: Pseudcolenis hoshinai Park & Ahn, new species; 4: P. hilleri Reitter. Scale bars: 0.1 mm.

FIGURES 6 – 11. Tibia and tarsus of Dermatohomoeus terrenus (Hisamatsu) (6 – 8) and Pseudcolenis hoshinai Park & Ahn, new species (9 – 11). 6, 9: protibia and protarsus; 7, 10: mesotibia and mesotarsus; 8, 11: metatibia and metatarsus. Scale bars: 0.1 mm.

FIGURES 12 – 15. Aedeagus of Pseudcolenis hilleri Reitter (12, 14) and P. hoshinai new Park & Ahn, new species (13, 15). 12 – 13: ventral aspect; 14 – 15: lateral aspect. Scale bars: 0.1 mm.

FIGURES 16 – 18. Spermatheca, lateral aspect. 16: Dermatohomoeus terrenus (Hisamatsu); 17: Pseudcolenis hilleri Reitter; 18: P. hoshinai Park & Ahn, new species. Scale bars: 0.1 mm.