Rovnoscydmus

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 43

† Rovnoscydmus sp. specimen 2

( Figs 15 , 126–129 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate, irregular piece of amber 8.5 mm long ( Fig. 15 ), collection number K-26348 ( SIZK).

Description. Body ( Figs 126–129 ) elongate, slender and relatively strongly convex, brown; BL about 0.83 mm.

Head ( Figs 128–129 ) only partly visible, broadest at eyes, HW 0.20 mm; vertex transverse; anterior part of head poorly visible; compound eyes large, strongly convex, oval; tempora seem shorter than eyes. Punctures and setae on head not visible. Antennae poorly visible.

Pronotum ( Fig. 128 ) slightly elongate, broadest near middle; PL 0.25 mm, PW 0.23 mm; punctures on disc ( Fig. 128 ) small but distinct, separated by spaces 2–4 × as wide as diameters of punctures; setae ( Fig. 128 ) short and sparse, nearly recumbent, on sides of pronotum replaced by distinct thick bristles ( Fig. 129 ).

Elytra ( Figs 126, 128 ) elongate oval, strongly convex, broadest slightly in front of middle, EL 0.58 mm, EW 0.35 mm, EI 1.64; punctures and setae similar to those on pronotum ( Fig. 128 ).

Legs ( Figs 126–129 ) moderately long, slender, unmodified.

Remarks. This inclusion is similar to specimen 1, but as it is only partly visible, a detailed comparison is not possible. Also in this specimen the ventral side of prothorax and pterothorax is well exposed, although details of the mesoventrite are not visible.

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 126 – 129. Rovnoscydmus sp. specimen 2 (K- 26348). Dorsal (126, 128) and ventral (127, 129) view. Abbreviations: abg, antebasal groove; bef, basal elytral fovea; bst, basisternal part of prosternum; hy, hypomeron; lbr, labrum; md, mandible; mtvp, metaventral intercoxal process; mxp 2 – 4, maxillary palpomere II – IV; nr, ' neck' region; st 3 – 8, abdominal sternite III – VIII; v 3, metaventrite; vt, vertex.