Rovnoscydmus

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 41-42

publication ID	https://doi.org/ 10.11646/zootaxa.4157.1.1
publication LSID	lsid:zoobank.org:pub:6BF4514A-892F-499F-BC1E-B7920C7A00B0
DOI	https://doi.org/10.5281/zenodo.5681768
persistent identifier	https://treatment.plazi.org/id/03A187A9-2911-FFD8-FF03-C0469E95F891
treatment provided by	Plazi
scientific name	Rovnoscydmus
status	gen. nov.

Treatment

† Rovnoscydmus View in CoL sp. specimen 1

( Figs 14 View FIGURES 1 – 20 , 120–125 View FIGURES 120 – 122 View FIGURES 123 – 125 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate prism of amber 11 mm long ( Fig. 14 View FIGURES 1 – 20 ), collection number K-25702 ( SIZK).

Description. Body ( Figs 120–125 View FIGURES 120 – 122 View FIGURES 123 – 125 ) elongate, slender and relatively strongly convex, light brown; BL 1.00 mm.

Head ( Figs 120–121 View FIGURES 120 – 122 , 123–124 View FIGURES 123 – 125 ) broadest at eyes, HL 0.20 mm, HW about 0.13 mm; vertex and frons confluent, together subtrapezoidal and moderately transverse; supraantennal tubercles weakly raised but distinct; compound eyes large, strongly convex, oval; tempora distinctly shorter than eyes. Punctures on frons and vertex ( Fig. 123 View FIGURES 123 – 125 ) fine and unremarkable, separated by spaces 3–4 × as wide as diameters of punctures; setae ( Fig. 123 View FIGURES 123 – 125 ) sparse, short and nearly recumbent. Antennae ( Figs 120–121 View FIGURES 120 – 122 , 123–124 View FIGURES 123 – 125 ) much shorter than half BL, AnL 0.40 mm, antennal club not demarcated; antennomeres I–II elongate, III–IV about as long as broad or slightly elongate, V–VII about as long as broad, VIII transverse, IX and X distinctly transverse, XI much shorter than IX–X combined, about 1.3 × as long as broad, with rounded apex.

Pronotum ( Figs 120 View FIGURES 120 – 122 , 123 View FIGURES 123 – 125 ) elongate, broadest site not possible to define; PL 0.25 mm, PW 0.20 mm; punctures on disc ( Fig. 123 View FIGURES 123 – 125 ) small but distinct, separated by spaces 3–4 × as wide as diameters of punctures; setae ( Fig. 123 View FIGURES 123 – 125 ) short and sparse, nearly recumbent, on sides of pronotum replaced by distinct thick bristles.

Elytra ( Figs 120 View FIGURES 120 – 122 , 123 View FIGURES 123 – 125 ) elongate oval, strongly convex, broadest site not possible to define, EL 0.55 mm, EW 0.30 mm, EI 1.83; punctures and setae similar to those on pronotum ( Fig. 123 View FIGURES 123 – 125 ).

Legs ( Figs 120–125 View FIGURES 120 – 122 View FIGURES 123 – 125 ) moderately long, slender, unmodified.

Remarks. This specimen differs from R. frontalis and R. microscopicus in proportions of body parts, but its external characters are unremarkable and do not allow for a reliable diagnosis of a new species. Structures of the mesoventrite are exceptionally well exposed in this inclusion ( Fig. 125 View FIGURES 123 – 125 ).