Lathrobium trascauensis, Struyve, 2022

Struyve, Tim, 2022, On the soil dwelling Staphylinidae (Coleoptera) of Romania, Belgian Journal of Entomology 127, pp. 1-22 : 19-20

Lathrobium trascauensis sp. nov.

urn:lsid:zoobank.org:act:5F4C7501-F69D-45B8-A961-0E5C54CC38B5

Figs 10 A-C, 11 A-C

TYPE MATERIAL EXAMINED. HOLOTYPE. ROMANIA: Iara , 01.XI.2017, 46.527°N 23.577°E: 1 male deposited in the HNHM. PARATYPES. ROMANIA: Iara , 01.XI.2017, 46.527°N 23.577°E: 1 male and 1 female (cStr).

ETYMOLOGY. The type material was found on the northern border of Muntele Trascău.

DESCRIPTION. MEASUREMENTS: HL: 0.75; HW: 0.69; PL: 0.88; PW: 0.61; EL: 0.70; EW: 0.70; AL: 1.0; TL: 5.5 - 6.0.

Completely depigmented, orange-reddish. Head a little longer than wide, sides convex. punctures sparse: distance about the size of the punctures itself. Microsculpture isodiametric, clearly present. Eyes reduced to a small yellow spot, maximal diameter smaller than the second article of the antennae. Antennae about 1.4 mm long, third article about 0.8 times as wide as long, article X about as wide as long.

Pronotum elongate, parallel. Punctuation a little denser and stronger than on the head, absent on the broad middle line. Microsculpture absent.

Elytra about as long as wide, Slightly wider near the apex. Punctuation as strong like on the pronotum, less dense. Surface without clear microsculpture but with irregular wrinkles.

Abdomen almost parallel, widest near the segment VI–VIII (visible segments 4–5). Punctuation small and sparse. Surface with strong isodiametric microsculpture.

This species belongs to a group of very similar species with L. coecum Frivaldszky, 1883 , L. jeanneli Koch, 1939 , L. kaszabi Pace, 1983 and L. moraveci Janák, 1987 . Externally completely like L. jeanneli , which is also geographically the closest and was commonly found by soil washing in the eastern Apuseni mountains. The aedeagus and secondary sexual characters are described by JANÁK (1987).

FEMALE: sternite VIII prolonged into a bilobed apex, tergite VIII without modifications. Tergite IX like Fig. 11B.

MALE: sternites V to VII with a central, posterior impression, on sternite V very weak, clearly visible on sternite VII and VIII. Sternite VII with between the normal yellow hairs some smaller black setae, more dense in the posterior part of the impression (only hairs drawn on Fig. 10 ). Sternite VIII with evenly distributed smaller black setae between the yellow hairs and a small excavation at the posterior edge. Impression strongest near the base.

Aedeagus with the ventral plate in lateral view almost straight with only with a small hook on the top. Dorsal plate with a prolonged tip. Between the ventral and dorsal plates two sclerites, one small and long, hardly curved and one shorter broad sclerite with a curved top.

Figures

Fig. 10. Aedeagus in lateral (A and D) and ventral views (B and E) and dorsal plate of the aedeagus (C and F). A-C, Lathrobium trascauensis sp. nov. D-F, Lathrobium gyorgyi sp. nov. Scale bar: 1 mm. cale bar: 1 mm.

Fig. 11. Male sternite VII and VIII (A and D), female tergite IX (B and E) and female sternite VIII (C). A-C, Lathrobium trascauensis sp. nov. D-E, Lathrobium gyorgyi sp. nov. Scale bar: 1 mm.