Lachnocrepis LeConte, 1853

Guéorguiev, Borislav & Liang, Hongbin, 2020, Revision of the Palaearctic and Oriental representatives of Lachnocrepis LeConte and Oodes Bonelli (Coleoptera: Carabidae), with special account on Chinese species, Zootaxa 4850 (1), pp. 1-89 : 58-59

subgenus Lachnocrepis LeConte, 1853 [= Eulachnocrepis Habu, 1956]

Type species: Oodes parallelus Say, 1830 , by monotypy.

Diagnosis. The species of Lachnocrepis share three derived character states: (1) ventral surface of meso- and metatarsomeres 1–4 (or 2–4) in both sexes and protarsomeres 1–4 (or 2–4) in female with long and dense fine setae aligned in two or more rows on each side of the tarsomere; (2) internal sac of median lobe without sclerite; and (3) bursa copulatrix expanded distally, two-chambered. The last two traits represent synapomorphies. The loss of the sclerite of internal sac of median lobe in Lachnocrepis is a feature not occurring in any other representative of the Oodes generic group. Expansion of bursa copulatrix consists of distal lobe folded toward main part of bursa, thus the bursa appears two-chambered. Distal lobe of bursa is more strongly developed in O. desertus than in O. japonicus ; that of O. parallela Say rather resembles that of O. japonicus (cfr. Bousquet 1996: 532, fig. 130, and Fig. 26G , present work). The modification of the tarsal setation in Lachnocrepis spp. is considered homoplasy since a similar, but independently evolved condition exists also in Pseudoodes coelestinus ( Fig. 6C , 23C, D, F ).

Geographical distribution and diversity. The subgenus includes three species, O. desertus Motschulsky from Southeast Europe, Siberia and Eastern Palaearctic, O. japonicus (Bates) from Eastern Palaearctic and northern outskirts of Oriental Region, and O. parallelus Say from eastern North America. The first two species live in sympatry in the Russian Far East, Northeast China, Korea, and Japan.

Figures

FIGURE 6. Pseudoodes coelestinus Chaudoir, 1882 (A–C: Oodes coelestinus, holotype; D–E: Oodes viridissimus, holotype; F–G: female specimen, Malaysia, Long Láma). A, D: habitus and labels; B: left metepisternum and metacoxa (arrow shows lateral end of metacoxal basal sulcus); C: right mesotarsomeres; E: head and pronotum; F: mentum; G: prosternal process. Scale lines = 2 mm (Fig. A, D); = 1 mm (Figs B–C, E); = 0.5 mm (Figs F–G).

FIGURE 23. Oodes desertus Motschulsky, 1858 (A–D: Oodes desertus Motschulsky, 1858, lectotype and its labels; E–F: Oodes hahni Reitter, 1908, lectotype and its labels). A, E: habitus; B: left metepisternum and metacoxa; C: left mesotarsomeres 1–5, inner side; D: left metatarsomeres 1–3, outer side; F: right mesotarsomeres, inner side. Scale lines = 2 mm (Figs A, E); = 1 mm (Figs B–D); = 0.5 mm (Fig. F).

FIGURE 26. Oodes japonicus (Bates, 1873) (A–B: male specimen, Japan, Shizuoka Pref., Iwata-shi, Tsurugaike; C–D: male specimen, Laos, Phou Pan Mt.; E–F: female specimen, Japan, Ibaraki Prefecture, Tsukuba City env.; G: female specimen, same locality). A, C: median lobe of aedeagus, left lateral view; B, D: same, dorsal view; E: left gonocoxite, ventral view; F: spermathecal complex and gonocoxites, dorsal view; G: spermathecal complex and gonocoxites, ventral view. Scale lines = 0.5 mm (Figs A–D, F–G); = 0.2 mm (Fig. E).