Oodes (Oodes) echigonus Habu & Baba, 1960

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 : 44-47

13. Oodes (Oodes) echigonus Habu & Baba, 1960

( Figs 16 A–G, Figs 17 A–F, Table 4)

Oodes echigonus Habu & Baba, 1960 (type loc.: ‘ Katamachi , Niigata Pref. ’).

References.

Oodes echigonus: Kasahara 1994: 94 (distribution in Japan); Bousquet 1996: 474 (relationships with Nearctic congeners, distribution in China: ‘Nanking, Kiangsu province’); Lorenz 1998: 305; Bousquet 2003: 445; Lorenz 2005: 325; Hasegawa et al. 2015: 22 ( Japan, Aichi Prefecture); Bousquet 2017: 636.

Type material. Not examined. Holotype preserved in the Insect Museum of the National Institute for Agro–Environmental Science, Tsukuba (https://www.naro.affrc.go.jp/org/niaes/type/dbcarabidae/o_echigonus.html).

Topotype material. JAPAN: N i i g a t a Prefecture: 2♂♂, 1♀, ‘ Niigata Pref., Jyôetsu-shi, Ookata-ku, Katamachi 3.IX.1976, Seiji Morita leg.’ ( NMNHS); 1♂, same data, but collected 25.V.1991 ( NMNHS); 1♀, same data, but collected 2.VI.1991 ( NMNHS).

Other material examined. CHINA: I m p re c i s e localities: 8♂♂, 8♀♀, China ( IZAS, NMNHS). J i a n g x i Province: 1♀, Jiangxi, Liantang, field margin, 1953.8. ( IZAS).

TME: 22 specimens. TGE: 3♂♂, 1♀.

Diagnosis. Members of this species are readily distinguished from those of other Palaearctic Oodes by their larger size, more than 12.5 mm, and very low PA/PW ( Table 4).

Description. Habitus. Specimens of large size (BL: 12.8–15.0 mm, BW: 5.3–6.2 mm), with subovate, moderately convex body ( Figs 16A, B, D, F ). Ratios and measurements. See Table 4. Color and luster. Body including palpi and legs black; antennae piceous to rufopiceous. Integument dorsally and ventrally moderately shiny, without iridescence. Punctuation. Dorsal surface without punctuation; sides of prosternum and metasternum, meso- and metepisternum densely punctate; proepisternum finely rugose; abdominal ventrites finely rugose and punctured. Head. Half or less than half as wide as pronotum (PW/HW: 2.00–2.16). Mentum tooth with distinct paramedial border ( Fig. 16C ). Thorax. Pronotum with sides rounded toward posterior angles (PW/PB: 1.02–1.06); maximum width in posterior third; laterobasal impressions indistinct; base moderately sinuate; anterior angles rounded, moderately projected anteriorly. Prosternum with median longitudinal sulcus shallow; prosternal process with apex rounded and border nearly complete, reduced at apex ( Fig. 16E ). Metepisternum longer than wide (MA/MM: 0.87–1.00), with lateral margin convex and coadunation with epipleuron rather long, located anteriorly ( Fig. 16G ). Elytra. Apical sinuation weak, but distinct. Basal margin distinct laterally, forming a minute denticle at shoulder, disappearing medially at level between striae 2 and 3. Granulation in marginal furrow continuous. Parascutellar striola and stria 1 shallower than other striae, striola punctate as well as striae 1–4 anteriorly; stria 7 as distinct as stria 6. Intervals 1–7 rather flat, interval 8 convex. Legs. Metacoxal basal sulcus extending to lateral fourth. Male mesotibia not modified. Protarsomeres 1–3 of male moderately dilated, with second segment longer than wide (W/Lp2: 0.82–0.88). Male genitalia. Median lobe ( Figs 17A, B, C, D ) with basal bulb short and narrow; angle between basal bulb and shaft nearly straight; shaft long and swollen; apex short, tapered and curved ventrally; apical lamella widely rounded; ostium long, but shorter than in O. helopioides , not reaching basal bulb. Female genitalia. Basal gonocoxite with ten or so lateroapical setae. Apical gonocoxite without dorsolateral ensiform setae, with nematiform setae ( Fig. 17E ). Spermatheca coiled apically ( Fig. 17F ).

Habitat. See “Habitat” under Pseudoodes vicarius .

Distribution. Palaearctic Region: Japan (Honshu), China (Jiangsu, Jiangxi).

Notes. Describing the male protarsomeres, Habu & Baba (1960) stated that “ segment 3 is almost as long as segment 2, slightly narrower than this, with apex oblique ” (ibid.: 32) and “ with lateral sides parallel ” (ibid.: 33). We measured the lengths of male protarsomeres 2 and 3 in four Chinese specimens and two topotypical specimens. It was established that protarsomere 3 is about 1.15–1.25 times longer than protarsomere 2, and thus, the above indication by Habu & Baba is not correct. It should be noted also that specimens from China have smaller body size (12.8–14.9 mm, original data), while those from Japan have body length 14.0– 15.2 mm (data from Habu & Baba 1960 and original data).

Figures

FIGURE 16. Oodes echigonus Habu & Baba, 1960 (A: topotype male specimen, Japan, Niigata Pref., Katamachi; B–C:topotype female specimen, same locality; D–E: male specimen, China, imprecise locality; F–G: female specimen, China, imprecise locality). A–B, D, F: habitus; C: mentum; E: prosternal process; G: left metepisternum and metacoxa. Scale lines = 2 mm (Figs A–B, D, F); = 0.5 mm (Figs C); = 1 mm (Figs E, G).

FIGURE 17. Oodes echigonus Habu & Baba, 1960 (A–B: topotype male specimen, Japan, Niigata Pref., Katamachi; C–D: male specimen, China, imprecise locality; E–F: topotype female specimen, same locality as in the male topotype).A, C: median lobe of aedeagus, left lateral view; B: same, dorsal view; D: same, ventral view; E: left gonocoxite, ventral view; F: spermathecal complex and gonocoxites, ventral view. Scale lines = 0.5 mm (Figs A–D, F); = 0.2 mm (Fig. E).