Cephennomicrus

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 31-32

Cephennomicrus sp. 4

( Figs 9 , 93–98 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate, irregularly subtriangular piece of amber 9.5 mm long ( Fig. 9 ), collection number K-8912 ( SIZK).

Description. Body ( Figs 93–98 ) elongate and strongly convex, nearly black; BL 1.00 mm.

Head ( Figs 93–94, 96–97 ) broadest at eyes, HL 0.13 mm, HW 0.28 mm; head structures poorly visible, vertex and frons confluent, weakly convex and together strongly transverse; supraantennal tubercles weakly marked; eyes large and strongly convex, moderately coarsely faceted. Antennae ( Figs 93–98 ) about as long as half BL, AnL about 0.50 mm, shapes of antennomeres obscured by turbid amber.

Pronotum ( Figs 93–94, 96–97 ) subrectangular, but exact shape difficult to asses in the studied specimen; PL 0.30 mm, PW 0.38 mm; pronotal disc broadest most likely near anterior third, sides rounded; posterior pronotal corners obtuse-angled; posterior margin arcuate; antebasal structures (i.e., pits and grooves), punctures and setae not visible.

Elytra ( Figs 93–94, 96–97 ) elongate oval, strongly convex, EL about 0.58 mm, EW 0.50 mm, EI about 1.15; punctures and setae not visible.

Legs ( Figs 95, 98 ) only partly visible, moderately long and slender.

Remarks. This specimen is poorly preserved, but the general body form and some ventral characters ( Fig. 98 ) allow for placing it in Cephennomicrus . See remarks for Cephennomicrus sp. 2.

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 93 – 98. Cephennomicrus sp. 4 (K- 8912). Anterodorsal (93, 94, 96, 97) and ventrolateral (95, 98) view. Abbreviations: bst, basisternal part of prosternum; psp, prosternal process; mtvp, metaventral intercoxal process.