Euconnus (Cladoconnus) robustus Reitter

Hlaváč, Peter & Stevanović, Miroslav, 2013, A review of the subgenus Cladoconnus Reitter of the genus Euconnus Thomson (Coleoptera: Staphylinidae: Scydmaeninae) from the Balkan Peninsula, Turkey and Caucasus, Zootaxa 3646 (4), pp. 401-425 : 412-413

Euconnus (Cladoconnus) robustus Reitter

( Figs. 21–22 )

Euconnus robustus Reitter, 1882: 575 . Type locality: Meskisches Gebirge [Meskheti Range] im Caucasus.

Material examined (2 3): LECTOTYPE, 1 3, here designated: GEORGIA: white label (p) Caucasus, Meskisch. Gb. [Meskheti Range] Leder, Reitter / red label (p) LECTOTYPE Euconnus sbg. Cladoconnus robustus Reitter, Hlaváč & Stevanoviċ des., 2011. (NMPC). PARALECTOTYPE: 1 3: same data as lectotype. (PHKS).

Lectotype designation: Redescription of this species given below is based on two specimens deposited in NMPC having a status of syntypes. Although Reitter (1882) did not mention the number of specimens in his original description, two males were found in NMPC with the label Caucasus, Meskisch. Gb. Leder, Reitter. One male is here designated lectotype and one male is paralectotype, in order to ensure the stability of nomenclature and provide a unique name-bearing type for Euconnus robustus .

Description: Body shiny, reddish-brown, legs, antennae and maxillary palpi lighter, body length 1.65 mm, body width 0.70 mm; with very sparse pubescence mainly on sides of head and pronotum, vertex also with sparse pubescence, pubescence absent on pronotal and elytral disc. Head slightly wider than long, tempora evenly convergent posteriorly; eyes protuberant; supra-antennal tubercles weakly protuberant. Antennae ( Fig. 21 ) 0.80 mm long; antennomeres III–VI subequal, slightly transverse, III transverse, 1.30 times as wide as long; VII 1.65 times as wide as long; antennomere VIII 1.25 times as wide as long; IX 1.40 times as wide as long; antennomere X slightly transverse, 1.20 times as wide as long; terminal antennomere 1.50 times as long as wide and about 1.85 times as long as X. Pronotum about as long as wide. Elytra about 1.40 times as long as wide, sutural striae reaching basal fourth of elytra. Aedeagus 0.35 mm in length, as in Fig. 22 .

Distribution: Armenia, Georgia, Russia (westen Caucasus).

Differential diagnosis: Euconnus robustus differs from other species of schlosseri group by small body, 1.65 mm long, all antennomeres III–VII slightly transverse, subequal; antennomeres VIII and IX which are 1.25 and 1.40 times as wide as long and slightly transverse antennomere X which is 1.20 times as long as wide. Euconnus robustus is similar to E. pararobustus (see also remarkss for that species) and also to E. garganicus and E. ispartaensis . From all these species E. robustus can be easily distinguished by much less transverse antennomere X, which is only 1.20 as wide as long. See also note of E. gagranicus .

Figures

FIGURES 15 – 22. 15, Euconnus goerzensis, antennae of male (scale: 0.2 mm); 16, E. goerzensis, aedeagus, dorsal aspect (scale: 0.1 mm); 17, E. ispartaensis, antennae of male (scale: 0.2 mm); 18, E. ispartaensis, aedeagus, dorsal aspect (scale: 0.1 mm); 19, E. meybohmi, antennae of male (scale: 0.2 mm); 20, E. meybohmi, aedeagus, dorsal aspect (scale: 0.1 mm); 21, E. robustus, antennae of male (scale: 0.2 mm); 22, E. robustus, aedeagus, dorsal aspect (scale: 0.1 mm).