Rovnoscydmus

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 44-45

† Rovnoscydmus sp. specimen 3

( Figs 16 , 130–134 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate, nearly rectangular prism of amber 15 mm long ( Fig. 16 ), collection number UA-1556 ( SIZK).

Description. Body ( Figs 130–134 ) elongate, slender and relatively strongly convex, light brown; BL 0.83 mm.

Head ( Figs 131–132, 134 ) broadest at eyes, HL 0.15 mm; vertex and frons not exposed in dorsal view; supraantennal tubercles indistinct; compound eyes large, strongly convex, oval; length of tempora in relation to eyes not possible to assess. Antennae ( Figs 130–134 ) much shorter than half BL, AnL 0.30 mm, antennal club indistinctly demarcated; antennomeres I–II elongate, III–VI seem to be elongate or at least not transverse, VII and VIII most likely transverse, IX and X slightly transverse, XI much shorter than IX–X combined, about 1.3 × as long as broad, with rounded apex.

Pronotum ( Figs 130, 133 ) seems to be slightly elongate, broadest site not possible to define; PL 0.20 mm; punctures on disc ( Fig. 134 ) small but distinct, separated by spaces 3–4 × as wide as diameters of punctures; setae ( Fig. 134 ) short and sparse, suberect or erect.

Elytra ( Figs 130, 133 ) elongate oval, strongly convex, broadest most likely in front of middle, EL 0.48 mm; punctures and setae similar to those on pronotum ( Fig. 134 ).

Legs ( Figs 130–134 ) moderately long, slender, unmodified.

Remarks. This inclusion is about as long as specimen 2, but the orientation of the beetle in amber and its strongly declined head and pronotum make it difficult to compare proportions of body parts.

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 130 – 134. Rovnoscydmus sp. specimen 3 (UA- 1556). Dorsolateral (130, 133) and ventrolateral (131, 132, 134) views. Abbreviations: abg, antebasal groove; bef, basal elytral fovea; bst, basisternal part of prosternum; cl, clypeus; fr, frons; hw, hind wing; lbr, labrum; nr, ' neck' region; mcp, mesocoxal projection; md, mandible; mxp 3 – 4, maxillary palpomere III – IV; v 3, metaventrite.