Cephennomicrus

Jałoszyński, Paweł & Perkovsky, Evgeny, 2016, Diversity of Scydmaeninae (Coleoptera: Staphylinidae) in Upper Eocene Rovno amber, Zootaxa 4157 (1), pp. 1-85 : 32-33

Cephennomicrus sp. 5

( Figs 10 , 99–102 )

Material studied. Late Eocene of Europe , Rovno amber: sex unknown; inclusion in rectangular prism of amber 13 mm long ( Fig. 10 ), collection number DU-32 ( SIZK).

Description. Body ( Figs 99–102 ) elongate and moderately strongly convex, dark brown; BL 0.76 mm.

Head ( Figs 99–102 ) broadest at eyes, HL 0.10 mm, HW 0.18 mm; frons and vertex confluent, weakly convex and together strongly transverse; supraantennal tubercles weakly marked; compound eyes large and strongly convex, moderately coarsely faceted; punctures on frons sparse and fine; setae sparse, short and nearly recumbent. Antennae ( Figs 99–102 ) much shorter than half BL, AnL about 0.25 mm, shapes of most antennomeres difficult to assess, but IX seems at least as long as broad or elongate, X transverse, XI about as long as IX–X combined or slightly shorter, about as broad as X and less than twice as long as broad, nearly or completely symmetrical.

Pronotum ( Figs 99, 102 ) subrectangular, but exact shape difficult to assess; PL 0.23 mm, PW 0.25 mm; pronotal disc seems to be broadest in front of middle, sides rounded in anterior third and weakly sinuate posteriorly; posterior pronotal corners obtuse-angled; posterior margin shallowly bisinuate with indistinct flattening in front of scutellum; base with two pairs of small and shallow but distinct antebasal pits ( Fig. 101 ; abp), only inner pair connected by narrow antebasal groove ( Fig. 101 ; abg). Punctures on pronotal disc fine but distinct, separated by spaces 1.5–2 × as wide as diameters of punctures; setae short, moderately dense, nearly recumbent ( Figs 99, 101 ).

Elytra ( Figs 99, 101 ) elongate oval, moderately convex, EL about 0.58 mm, EW about 0.30 mm, EI about 1.46; punctures and setae similar to those on pronotum ( Figs 99, 101 ) but slightly denser.

Legs ( Figs 100, 102 ) moderately long, slender, unmodified; all tibiae straight or weakly curved. Remarks. See remarks for Cephennomicrus sp. 3.

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 99 – 102. Cephennomicrus sp. 5 (DU- 32). Laterodorsal (99, 101) and ventrolateral (100, 102) view. Abbreviations: abg, antebasal groove; abp, antebasal pit; bef, basal elytral fovea; bst, basisternal part of prosternum; hy, hypomeron; hyr, hypomeral ridge; lpc, lateral pronotal carina; mcp, mesocoxal projection; mtvp, metaventral intercoxal process; st 3 – 8, abdominal sternite III – VIII; v 3, metaventrite.