Vertheia quadrisetosa, 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 : 19-20

† Vertheia quadrisetosa sp. n.

( Figs 2 , 49–55 )

Type material. Holotype: Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate, dropshaped piece of amber 14 mm long ( Fig. 2 ), collection number K-243 ( SIZK).

Diagnosis. As for genus; additionally pronotum with two pairs of long lateral setae and EI nearly 1.3. Description. Body ( Figs 49–55 ) elongate and flatten, brown; BL 0.98 mm.

Head ( Figs 49–54 ) broadest at large eyes, HL 0.15 mm, HW 0.25 mm; vertex and frons together nearly subquadrate; supraantennal tubercles indistinct. Punctures on head fine and unremarkable, setae only partly visible ( Fig. 54 ), sparse, short and suberect, except for pair of remarkably long setae, each inserted near posteromesal margin of compound eye ( Fig. 54 ). Antennae ( Figs 49–54 ) about 0.4 × as long as body, AnL 0.40 mm, scape and pedicel strongly elongate, antennomeres III–X slightly to strongly transverse, XI about as long as IX–X together, about as broad as X, with blunt apex.

Pronotum ( Figs 49–50, 52, 53–54 ) subrectangular; PL 0.28 mm, PW 0.30 mm; pronotal disc broadest near anterior third, sides near posterior third indistinctly concave; transverse antebasal groove ( Fig. 53 ; abg) seems not connected to lateral antebasal impressions ( Fig. 53 ; abi). Each lateral pronotal margin with two long setae located in median region; pronotum with shallow but distinct punctures separated by spaces subequal to two diameters of punctures; setae sparse, moderately long, nearly recumbent ( Fig. 54 ).

Elytra ( Figs 49–50, 53–54 ) elongate oval, flattened, EL 0.55 mm, EW 0.43 mm, EI 1.29; punctures slightly denser than those on pronotal disc; setae similar to those on pronotum ( Fig. 54 ).

Legs ( Fig. 55 ) moderately long, slender, unmodified.

Etymology. The name quadrisetosa refers to the long paired setae on sides of the pronotum.

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 49 – 55. Holotype of Vertheia quadrisetosa sp. n. (K- 27418). Habitus in anterodorsal (49), dorsal (50, 53), ventral (51) and anterodorsal (54) views, head and prothorax in dorsal view (52), pterothorax in ventral view (55). Abbreviations: abg, antebasal groove; abi, antebasal impression; bst, basisternal part of prosternum; fr, frons; frp, frontal pit; hy, hypomeron; hyr, hypomeral ridge; msvp, mesoventral intercoxal process; mtvp, mxp 3 − 4, maxillary palpomere III − IV; metaventral intercoxal process; nr, ' neck' region; nss, notosternal suture; occ, occipital constriction; st 3 − st 8; abdominal sternite III − VIII; tm, temple; v 3, metaventrite; vt, vertex.