Anthracus transversalis (Schaum, 1862)

Putchkov, A. V. & Nitochko, M. I., 2015, The Ground-Beetles Of The Genus Anthracus (Coleoptera, Carabidae) Of Ukraine, Vestnik Zoologii 49 (2), pp. 187-190 : 188-189

Anthracus transversalis (Schaum, 1862)

Stenolophus transversalis Schaum, 1862: 111 .

D i s t r i b u t i o n. Middle and South Europe (partly the south of Balkan Peninsula and Italy) ( Yaeger , Kataev , 2003). Known from the south-west part of Moldova and south of the European part of Russia — Krasnodar Region, Taman ( Kryzhanovskij et al., 1995). In Ukraine one specimen was recorded from south of Odessa Region (own data) .

E c o l o g i c a l d a t a. Littoral meso-hygrophilous species, which occurs very rarely and locally near the beach of different water basins. It was found in June in floodplain of Danube river (Odessa Reg., Kiliya city env., ending of May).

The Key of the Adult Beetles of the Genus Anthracus of Ukraine

1 (2). Smaller species: 3.1–4.3 mm. Elytral intervals 3 with 1 setiferous puncture behind middle only. Head large and wide, at 0.87–0.94 times as wide as pronotum. Posterior angles of pronotum almost obtused, rounded on apex ( fig. 1 ). Antennae very long, at 3.2–3.6 times as long as pronotum. Striae of elytra delicate. Head brown, mouthparts reddish or yellow-brown; pronotum (except lighter narrow lateral margin) dark brown or reddish brown, sometimes with indistinct dark macula on the disk. Elytra with

1 2 3 large brown macula in apical two-thirds part (but schoulders, suture and narrow lateral margin of elytra — yellowish). Legs and antennae pale brown or reddish, the later often slightly infuscated from antennomere 3. Ventral surface of body dark brown, but abdominal sternites sometimes pale-reddish in the middle. .............................................................................................. 1. A. longicornis (Schaum, 1857) .

2 (1). Larger species: 3.8–5.2 mm. Elytral intervals 3 with 3–5 setiferous puncture behind middle. Head small- er and distinctly at 0.75–0.89 times as narrow as pronotum ( fig. 2, 3 ). Posterior angles of pronotum almost right, acuted on apex. Antennae distinctly shorter, at 2.6–3.2 times as long as pronotum.

3 (4). Pronotum with sides already faintly sinuate or almost parallel in posterior third. Pronotum at 1.32–1.39 times as wide as pronotum on base, which almost equal to anterior margin ( fig. 2 ). Width of pronotum at 1.3 times more length. Eyes weakly convex. Antennomere 2 slightly shorter antennomere 3. 3.9–5.2 мм. Head and pronotum reddish brown, mouthparts pale-reddish. Elytra with large indistinct darkened macula. Legs and antennae yellowish, the later often slightly infuscated from antennomere 3. Ventral surface of body yellowish brown, ventral side of head and prosternum sometimes slightly darkened. ............................................................................................................. 2. A. transversalis (Shaum, 1862) .

4 (3). Pronotum with very rounded sides, distinctly narrowed posteriorly, only with a short sinuation before posterior angles ( fig. 3 ). Pronotum at 1.41–1.68 times as wide as of pronotum on base, which distinctly narrower than anterior margin. Width of pronotum at 1.36–1.43 times more as length. Eyes distinctly convex. Antennomere 2 at 1.5 or more times as short as antennomere 3. 3,8–5,1 mm. Head black, mouthparts reddish; antennomeres 1–2 reddish; pronotum from yellow-reddish to reddish-brown, disk usually darkened; elytra pale-reddish or yellow-brown with dark brown elongate macula, varying in size. Ventral surface of body almost dark brown to almost black, but abdominal sternites often palereddish on the middle. Anterior tarsus of males not widened. Legs yellow. ................................................. .................................................................................................................... 3. A. consputus (Duftschmid, 1812) .

Figures

Fig. 1–3. Head and pronotum of Anthracus (after Jaeger, 2011): 1 — A. londicornis; 2 — A. transversalis; 3 — A. consputus.