Microscydmus

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 68-69

? Microscydmus sp. 2

( Figs 30 , 204–208 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate, subtrapezoidal prism of amber 14 mm long ( Fig. 30 ), collection number K-6943 ( SIZK).

Description. Body ( Figs 204–208 ) elongate, moderately slender and convex, light brown; BL 0.73 mm.

Head ( Figs 204–208 ) short and subhexagonal, broadest at eyes, HL 0.13 mm, HW 0.19 mm; vertex ( Fig. 207 ; vt) and frons ( Fig. 207 ; fr) confluent, weakly convex and together subhexagonal, strongly transverse; eyes large, oval, strongly convex; tempora in lateral view ( Fig. 208 ) distinctly shorter than eyes. Punctures and setae on frons and vertex poorly visible. Antennae ( Figs 204–208 ) distinctly shorter than half BL, AnL about 0.25 mm, scape and pedicel strongly elongate, antennomeres III–VII each about as long as broad or slightly elongate, VIII slightly elongate, X about as long as broad, XI slightly transverse, XI much shorter than IX–X combined, about 1.2 × as long as broad, slightly narrower than X and rounded at apex.

Pronotum ( Figs 204, 207 ) round, broadest near anterior third; PL 0.20 mm, PW 0.20 mm; anterior and posterior margins weakly arcuate, anterior and posterior pronotal corners broadly obtuse-angled and blunt; sides strongly rounded; antebasal structures poorly visible. Punctures and setae on pronotal disc poorly visible.

Elytra ( Figs 204–205, 207–208 ) elongate oval, moderately convex, EL 0.40 mm, EW 0.30 mm, EI 1.33; punctures ( Fig. 208 ) fine but discernible, separated by spaces 3–4 × as wide as diameters of punctures; setae ( Fig. 208 ) sparse, short, suberect.

Legs ( Figs 205–206, 208 ) moderately long, slender, unmodified.

Remarks. This small specimen is tentatively identified as Microscydmus , but too few important structures are observable to confirm this placement.

Figures

FIGURES 21 – 34. Specimens of Rovno amber with inclusions of Scydmaeninae. K- 8972, Rovnoscydmus sp. specimen 8 (21); K- 3322, Rovnoscydmus sp. specimen 9 (22); K- 15548,? Rovnoscydmus sp. specimen 10 (23); K- 8971,? Rovnoscydmus sp. specimen 11 (24); K- 6045, Euconnus palaeogenus sp. n. (25); K- 9126, Euconnus sp. 1 (26); K- 24859,? Euconnus sp. 2 (27); K- 24302, Stenichnus proavus sp. n. (28); UA- 2216, Microscydmus sp. 1 (29); K- 6943,? Microscydmus sp. 2 (30); K- 3657 a,? Microscydmus sp. 3 (31); K- 6764,? Scydmoraphes sp. 1 (32); K- 6274, Glandulariini gen. & sp. indet. 1 (33); K- 7089, Glandulariini gen. & sp. indet. 2 (34).

FIGURES 204 – 208.? Microscydmus sp. 2 (K- 6943). Dorsal (204, 207), lateral (205, 208) and ventral (206) views. Abbreviations: bef, basal elytral fovea; fr, frons; mxp 2 – 4, maxillary palpomere II – IV; nr, ' neck' region; tm, temple; vt, vertex.