Lathrobium matalini, Anlas, 2013

Anlas, Sinan, 2013, A new species and additional records of the genus Lathrobium Gravenhorst, 1802 from Palaearctic region (Coleoptera: Staphylinidae: Paederinae), Revue suisse de Zoologie 120 (1), pp. 83-91 : 88-90

Lathrobium matalini sp. n.

(Figs 1-10)

HOLOTYPE: ♂, KAZAKHSTAN, “KZ. Yuzhno-Kazakhstan region, south bank of Kyzylkol lake , right bank Ushbas riv. , near mouth 1200 m, 43˚43’56”N, 69˚30’48”E, 31.III.2010, leg. Matalin / Holotypus ♂, Lathrobium matalini sp. n. det. S. Anlas, 2011” ( cAnl).

PARATYPES: 1♀, same data as holotype ( cAnl). – 1♂, KAZAKHSTAN, Yuzhno- Kazakhstan region, Arystandi riv. , upstream, 7,5 NNE of Shaklak mount., 400 m, 43˚15’17”N, 69˚26’30”E, 24-30.III.2010, leg. Matalin ( cKha).

ETYMOLOGY: The species is dedicated to Dr. A. V. Matalin, Russia, a specialist on Coleoptera , Carabidae , who collected the new species.

DESCRIPTION: Measurements (in mm) and ratios (range; n=3): AL: 2.08-2.22; HL: 0.84-1.01; HW: 0.80-0.92; PL: 0.90-1.12; PW: 0.72-0.85; EL: 0.88-1.00; EW: 0.81-0.92; AW: 0.96-1.08; ML: 1.00-1.05 (n=2); TL: 6.9-7.1; HL/HW: 1.05-1.10; PW/HW: 0.90-0.92; PW/PL: 0.80-0.82; EL/PL: 0.89-0.98; EW/PW: 1.08-1.13; EL/EW: 1.09; AW/EW: 1.17-1.19.

Habitus as in Fig. 1. Species of moderate size (see measurements). Coloration: head reddish brown, pronotum reddish, elytra blackish but posterior margin of elytra dark brown, abdomen black, antennae reddish yellow, legs yellowish.

Head slightly oblong (see measurements, ratio HL/HW and Figs 1, 6); eyes moderately small (Fig. 6), approximately 1/4 the length of postocular region in dorsal view; punctation distinct, but not very coarse, moderately sparse; punctation in central dorsal region even wider and larger, surface with distinct; interstices in lateral dorsal areas approximately twice as wide as diameter of punctures, antennae relatively long; antennomere III longer than II; antennomeres IV-X almost 1,5 times longer than wide; antennomere XI almost twice as long as wide (Fig. 1).

Pronotum narrower than head (see ratio PW/HW, Figs 1, 6) and distinctly oblong (see ratio PW/PL and Figs 1, 6); lateral margins subparallel in dorsal view; punctation slightly coarser than that of head; interstices on average approximately 1.5 times as wide as diameter of punctures; microsculpture absent.

Elytra shorter than pronotum (see ratio EL/PL, Figs 1, 6); and approximately 1.1 times as wide (see ratio EL/EW, Figs 1, 6); puncturation well-defined, punctation finer, shallower, denser, and less defined than that of pronotum. Hind wings reduced.

Abdomen wider than elytra (see ratio AW/EW, Figs. 1, 6); puncturation fine and moderately dense; microsculpture shallow, microsculpture present, but very shallow; posterior margin of tergite VII without palisade fringe.

♂: sternite VII modified (Fig. 5), posterior margin moderately concave in the middle, with black modified setae; sternite VIII shaped as in Fig. 8, posterior margin concave, in the middle with cluster of black modified setae, posterior margin in the middle with broadly V-shaped excision; aedeagus distinctive especially in lateral view and weakly asymmetric ventral process (Figs 9, 10).

♀: female tergite and sternite VIII as Figs 2 and 3.

COMPARATIVE NOTES: The new species is readily distinguished from all its congeners by the characteristic shape of the aedeagus, in particular the shape of the lateral process, and the modifications of the male sternites VII and VIII. From other congeners recorded from Middle Asia and adjacent regions, and with similarly short elytra and reduced hind wings, it is additionally separated as follows:

- from L.kastcheevi Assing, 2009 (southern Kazakhstan) by the different coloration (in L. kastcheevi ; head, pronotum, and abdomen blackish; elytra reddish, anterior third distinctly infuscate);

- from L. vitalyi Assing, 2008 (southern Kazakhstan) by the different coloration of the elytra ( L. vitalyi elytra reddish);

- from L. lackneri Assing, 2009 (southern Kyrgyzstan) by the different coloration (in L. lackneri body black, with elytra dark reddish brown);

- from L caspicum Koch, 1938 ( Azerbaijan and Iran) by the different coloration (in L. caspicum head and pronotum black, elytra bicoloured, with the anterior half black and the posterior half reddish);

- from L. marani Koch, 1939 ( Kazakhstan, Tajikistan, and Kyrgyzstan) by its smaller size and the reddish pronotum (in L. marani black);

- from L. bucharense Koch, 1944 ( Uzbekistan) by the reddish pronotum (in L. bucharense blackish); from L. kuntzeni Koch, 1939 ( Uzbekistan, Iran) by the different coloration ( L. kuntzeni pronotum black with blueish hue, apex of abdomen reddish);

- from L. concolor Motschulsky, 1860 ( Uzbekistan, Mongolia, Russian Far East) by smaller size;

- from L. semirufulum Bernhauer, 1902 ( Kazakhstan, Tajikistan) by its larger size ( L. semirufulum : approximately 5-5.5 mm) and by completely dark coloration of the abdomen (in L. semirufulum apex of abdomen reddish), for illustrations of the aedeagus of L. semirufulum see Coiffait (1982: in figs 83C, D); according to Gusarov (1995), these figures refer to L. semirufulum , not to Lobrathium sahlbergi (Fauvel, 1900) , as indicated by Coiffait (1982) (see Assing, 2007b).

DISTRIBUTION: The species was collected in two localities in southern Kazakhstan, in bank of Kyzylkol lake and bank of Arystandi river. It seems most likely that, this species has a restricted distribution.