Camioleum choi Shin & Ahn

Shin, Choru & Ahn, Kee-Jeong, 2006, Camioleum choi, a new species in the omaliine tribe Anthophagini (Coleoptera: Staphylinidae) from Korea, Zootaxa 1227, pp. 57-62 : 58-61

Camioleum choi Shin & Ahn , new species

( Figs. 1–7 )

Type series

Holotype, male, labeled as follows: KOREA: Gangwon Prov., Pyeongchang­gun, Jinbu­myeon, Mt. Odaesan, Sangwonsa, 4 2001, SJ Park, sifting; Holotype, Camioleum choi Shin and Ahn, Desig. K. ­J. Ahn, 2006. Paratype, 1 male, same data as holotype; 1 female, same data as holotype except for 30 IV–4 VI 2001, KJ Ahn, SJ Park, MS Kim, MJ Jeon, FIT; 1 female, same data as holotype except for 8–25 V 2004, SJ Park, DH Lee, JS Park, FIT.

Description

Body length 3.5–3.7 mm (from clypeus to apex of elytra). Body broad, convex. Body glossy, brown, antennomeres 6–11 dark brown, abdomen black. Head more or less pentagonal, about 1.6 times wider than long, depressed above, with scattered distinct punctures. Compound eyes prominent, about 2.3 times longer than tempora, distinct orbital ridge present behind each eye, postocular region arcuate, a pair of distinct ocelli present, distance between them about 2.0 times wider than distance between outside of ocellus and inner margin of eye. Antennae long and filiform, reaching to basal fourth of elytra, incrassate distally, all antennomeres longer than wide, antennomeres 1–5 polished and 6–11 opaque. Antennomere 1 robust, about 2.0 times longer than wide; 2: length to width ratio 2.0, shorter and narrower than 1; 3: slender, slightly dilated apically, 2.5 times longer than wide, longer and narrower than 2; 4–7: more or less same in length and shape as each other, 8–10: slightly decreasing in length, increasing in width. Maxillary palpomere 4 longest and more or less pointed apically. Pronotum surface uneven, convex medially, but depressed along median line and with V­shaped depression from lateral margin to posterior margin; more or less deplanate laterally; widest near middle, posterior and anterior margin more or less same in length, anterior margin broadly emarginated, posterior margin almost straight, each lateral margin round and crenulate, anterior and posterior angles round; single fovea present in middle of each deplanate lateral area, punctures much larger than those on head. Elytra long, covering entire abdomen, oval and convex, lateral margin in anterior margin very slightly crenulate, narrowly deplanate along lateral margin, punctation striate. Legs long and slender.

Male. Protibia with a number of short peg setae incurved at apical third, mesotibia with a number of minute spines and short peg setae in apical two thirds on ventral region. Aedeagus as in Figs. 6–7 . Median lobe long and divided into three lobes, middle lobe constricted in apical third and more or less pointed, each lateral lobe curved to opposite side. Parameres slender and long, a little longer than median lobe.

Female. Protibia straight, without modified peg setae; mesotibia lack modified peg setae. Tergite VIII with prolonged apex ( Fig. 3 ). Sternite VIII with numerous setae ( Fig. 4 ). Genital segment with an internal sclerite ( Fig. 5 ).

Distribution

Korea.

Remarks

The new species is similar to C. loripes , but, in addition to some differences in the structure of the aedeagus, can be distinguished by the following characters: the tip of maxillary palpomere 4 of C. loripes is broadly rounded ( Watanabe 1990, Fig. 100), while that of C. choi is more or less pointed; pronotum of C. loripes is more strongly narrowed posteriorly than anteriorly ( Watanabe 1990, Fig. 98), in contrast to more or less the same length of anterior and posterior margin in C. choi ( Fig. 1 ); C. loripes has arcuate and rectangular posterior angles of pronotum ( Watanabe 1990, Fig. 98), but in C. choi the angles are rounded ( Fig. 1 ); the apical margin of male sternite VIII of C. loripes is more or less straight ( Smetana 1985, Fig. 1 ), but that of C. choi is prolonged ( Fig. 2 ); the apical margins of female tergite VIII ( Smetana 1985, Fig. 5 ) and sternite VIII ( Smetana 1985, Fig. 4 ) of C. loripes are emarginated, in contrast, in C. choi they are prolonged ( Figs. 3–4 ); the median lobe of C. loripes is entire ( Watanabe 1990, Fig. 106), while it is divided into three lobes ( Fig. 6 ) in C. choi ; the parameres of C. loripes are shorter than the median lobe ( Watanabe 1990, Fig. 106), in contrast, in C. choi the parameres are longer than the median lobe ( Fig. 6 ).

Figures

FIGURE 1. Camioleum choi, new species, male. Body length 3.7 mm.

FIGURES 2 – 5. Camioleum choi, new species. 2, male sternite VIII, ventral aspect; 3, female tergite VIII, dorsal aspect; 4, female sternite VIII, ventral aspect; 5, female genital segment, ventral aspect. Scale bar 0.1 mm.

FIGURES 6 – 7. Camioleum choi, new species. 6, aedeagus, ventral aspect; 7, aedeagus, lateral aspect. Scale bar 0.1 mm.