Rovnoscydmus

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 51-52

† Rovnoscydmus sp. specimen 7

( Figs 20 , 151–154 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in subtriangular, irregular piece of amber 23 mm long ( Fig. 20 ), collection number K-3037 ( SIZK).

Description. Body ( Figs 151–154 ) elongate, slender and relatively strongly convex, moderately light brown; BL 0.95 mm.

Head ( Figs 151–154 ) broadest at eyes, HL about 0.15 mm, HW 0.20 mm; vertex strongly transverse; frons not visible; compound eyes large, strongly convex, oval; length of tempora in relation to eyes not possible to assess. Punctures and setae on dorsum of head poorly visible. Antennae ( Figs 151–154 ) much shorter than half BL, AnL 0.35 mm, antennal club indistinctly demarcated; antennomeres I–II strongly elongate, shapes of proximal flagellomeres difficult to assess, antennomeres VIII–X about as long as broad, XI much shorter than IX–X combined, about 1.2 × as long as broad, with rounded apex.

Pronotum ( Figs 151, 153 ) slightly elongate, broadest near anterior fourth (but very indistinctly narrowing posteriorly); PL 0.25 mm, PW 0.24 mm; punctures and setae on disc poorly visible, setae on sides of pronotum replaced by distinct thick bristles ( Fig. 153 ).

Elytra ( Figs 151, 153 ) elongate oval, broadest site not possible to define, EL 0.55 mm, EW 0.38 mm, EI 1.47; punctures ( Fig. 153 ) fine but distinct, separated by spaces 2–3 × as wide as diameters of punctures; setae ( Fig. 153 ) short, sparse and nearly recumbent.

Legs ( Figs 151–154 ) moderately long, slender, unmodified.

Remarks. This specimen, although relatively well exposed, is unremarkable and difficult to identify as conspecific with any other inclusion of Rovnoscydmus .

Figures

FIGURES 1 – 20. Specimens of Rovno amber with inclusions of Scydmaeninae. K- 27418, Rovnoleptochromus ableptonoides sp. n. (1); K- 243, Vertheia quadrisetosa sp. n. (2); UA- 442, Vertheia sp. 1 (3); K- 800, Cephennodes sp. 1 (4); K- 6011, Cephennomicrus giganteus sp. n. (5); K- 8289, Cephennomicrus sp. 1 (6); K- 7010, Cephennomicrus sp. 2 (7); K- 27565, Cephennomicrus sp. 3 (8); K- 8912, Cephennomicrus sp. 4 (9); DU- 32, Cephennomicrus sp. 5 (10); K- 5770, Glaesoconnus unicus sp. n. (11); K- 9579, Rovnoscydmus frontalis sp. n. (12); K- 347, Rovnoscydmus microscopicus sp. n. (13); K- 25702, Rovnoscydmus sp. specimen 1 (14); K- 26348, Rovnoscydmus sp. specimen 2 (15); UA- 1556, Rovnoscydmus sp. specimen 3 (16); K- 8970, Rovnoscydmus sp. specimen 4 (17); K- 8968, Rovnoscydmus sp. specimen 5 (18); K- 7350, Rovnoscydmus sp. specimen 6 (19); K- 3037, Rovnoscydmus sp. specimen 7 (20).

FIGURES 151 – 154. Rovnoscydmus sp. specimen 7 (K- 3037). Dorsal (151, 153) and ventral (152, 154) views. Abbreviations: abg, antebasal groove; bst, basisternal part of prosternum; bsti, basistipes; cl, clypeus; lbr, labrum; md, mandible; mxp 3 – 4, maxillary palpomere III – IV; nr, ' neck' region.