Rovnoscydmus

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 48

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.5681788
persistent identifier	https://treatment.plazi.org/id/03A187A9-2916-FFDE-FF03-C4F19C27FADA
treatment provided by	Plazi
scientific name	Rovnoscydmus
status	gen. nov.

Treatment

† Rovnoscydmus View in CoL sp. specimen 5

( Figs 18 View FIGURES 1 – 20 , 139–144 View FIGURES 139 – 144 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate, subtriangular prism of amber 9 mm long ( Fig. 18 View FIGURES 1 – 20 ), collection number K-8968 ( SIZK).

Description. Body ( Figs 139–144 View FIGURES 139 – 144 ) elongate, relatively stout and strongly convex, brown; BL 1.05 mm.

Head ( Figs 139–144 View FIGURES 139 – 144 ) broadest at eyes, HL 0.15 mm, HW 0.20 mm; poorly visible; supraantennal tubercles indistinct; compound eyes large, strongly convex, oval; tempora slightly shorter than eyes. Antennae ( Figs 139– 143 View FIGURES 139 – 144 ) distinctly shorter than half BL, AnL about 0.38 mm, antennal club indistinctly demarcated; antennomeres I–II elongate, III–IV seem to be slightly transverse, V slightly elongate, VI–VII about as long as broad, VIII transverse or about as long as broad, IX and 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 139, 142 View FIGURES 139 – 144 ) round, broadest site not possible to define; PL 0.25 mm, PW 0.25 mm; punctures on disc ( Fig. 142 View FIGURES 139 – 144 ) small but distinct, separated by spaces 2–3 times as wide as diameters of punctures; setae ( Fig. 142 View FIGURES 139 – 144 ) short and sparse, nearly recumbent, on anterior portions of hypomera replaced by distinct thick bristles ( Fig. 143 View FIGURES 139 – 144 ).

Elytra ( Figs 139, 142 View FIGURES 139 – 144 ) elongate oval, strongly convex, broadest site not possible to define, EL 0.65 mm, EW about 0.48 mm, EI about 1.37; punctures similar to those on pronotum but slightly sparser; setae poorly visible ( Fig. 142 View FIGURES 139 – 144 ).

Legs ( Figs 139–144 View FIGURES 139 – 144 ) moderately long, slender, unmodified.

Remarks. This specimen seems to be stouter than remaining inclusions of Rovnoscydmus and may represent a separate species, but the state of preservation and orientation in amber make comparisons difficult. Alternatively, it may be conspecific with Rovnoscydmus specimens 4, 8 and? Rovnoscydmus specimen 10, as they were all found in one piece of amber.