Rovnoscydmus frontalis, Jałoszyński, Paweł & Perkovsky, Evgeny, 2016

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 38

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.5681764
persistent identifier	https://treatment.plazi.org/id/03A187A9-291C-FFD4-FF03-C16D9E0EF8BE
treatment provided by	Plazi
scientific name	Rovnoscydmus frontalis
status	sp. nov.

Treatment

† Rovnoscydmus frontalis View in CoL sp. n.

( Figs 12 View FIGURES 1 – 20 , 108–114 View FIGURES 108 – 111 View FIGURES 112 – 114 )

Type material. Holotype: Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate, triangular prism of amber 21.5 mm long ( Fig. 12 View FIGURES 1 – 20 ), collection number K-9579 ( SIZK).

Diagnosis. Rovnoscydmus with frons demarcated from vertex by faint, broadly and inversely V-shaped transverse carina; BL 0.88 mm; EI 1.64.

Description. Body ( Figs 108–112, 114 View FIGURES 108 – 111 View FIGURES 112 – 114 ) elongate, slender and relatively strongly convex, brown; BL 0.88 mm.

Head ( Figs 108–114 View FIGURES 108 – 111 View FIGURES 112 – 114 ) broadest at eyes, HL 0.18 mm, HW 0.18 mm; vertex and frons together subtrapezoidal and moderately transverse; frons anteriorly with faint transverse carina angulate at middle ( Fig. 113 View FIGURES 112 – 114 ; frc); supraantennal tubercles weakly raised but distinct; compound eyes large, strongly convex, oval; tempora about as long as eyes. Punctures on head fine and indistinct, separated by spaces as wide as 3–4 diameters of punctures; setae ( Fig. 112 View FIGURES 112 – 114 ) short, sparse, suberect. Antennae ( Figs 108–114 View FIGURES 108 – 111 View FIGURES 112 – 114 ) shorter than half BL, AnL 0.38 mm, antennal club indistinctly demarcated; antennomeres I–II elongate, III transverse, IV–IX each about as long as broad, X slightly transverse, XI much shorter than IX–X combined, slightly longer than broad, with rounded apex.

Pronotum ( Figs 108 View FIGURES 108 – 111 , 112 View FIGURES 112 – 114 ) elongate, broadest between middle and anterior third; PL 0.25 mm, PW 0.18 mm; punctures on disc ( Fig. 112 View FIGURES 112 – 114 ) small but distinct, separated by spaces 3–5 times as wide as diameters of punctures; setae ( Fig. 112 View FIGURES 112 – 114 ) short, sparse and suberect, in anterior half of disc directed posteriorly, in posterior half posteromesally.

Elytra ( Figs 108 View FIGURES 108 – 111 , 112 View FIGURES 112 – 114 ) elongate oval, strongly convex, broadest in between middle and anterior third, EL 0.45 mm, EW 0.28 mm, EI 1.43; punctures and setae similar to those on pronotum ( Fig. 112 View FIGURES 112 – 114 ).

Legs ( Figs 108–112, 114 View FIGURES 108 – 111 View FIGURES 112 – 114 ) moderately long, slender, unmodified.

Etymology. The name frontalis refers to the frontal carina.