Rovnoscydmus microscopicus, 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 : 40-41

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.5681766

persistent identifier

https://treatment.plazi.org/id/03A187A9-291E-FFD9-FF03-C3349F4BFAC9

treatment provided by

Plazi

scientific name

Rovnoscydmus microscopicus
status

sp. nov.

Rovnoscydmus microscopicus View in CoL sp. n.

( Figs 13 View FIGURES 1 – 20 , 115–119 View FIGURES 115 – 117 View FIGURES 118 – 119 )

Type material. Holotype: Late Eocene of Europe , Rovno amber: sex unknown; inclusion in elongate, trapezoidal prism of amber 18 mm long ( Fig. 13 View FIGURES 1 – 20 ), collection number K-347 ( SIZK).

Diagnosis. Rovnoscydmus with frons not demarcated from vertex; BL 0.64 mm; EI 1.47.

Description. Body ( Figs 115–119 View FIGURES 115 – 117 View FIGURES 118 – 119 ) elongate, slender and relatively strongly convex, brown; BL 0.64 mm.

Head ( Figs 115–119 View FIGURES 115 – 117 View FIGURES 118 – 119 ) broadest at eyes, HL 0.11 mm, HW 0.14 mm; vertex and frons confluent, together subtrapezoidal and moderately transverse; supraantennal tubercles weakly raised but distinct; compound eyes large, strongly convex, oval; tempora shorter than eyes. Punctures and setae on head poorly visible. Antennae ( Figs 115–119 View FIGURES 115 – 117 View FIGURES 118 – 119 ) slightly shorter than half BL, AnL 0.30 mm, antennal club indistinctly demarcated; antennomeres I–II elongate, III–VII each about as long as broad, VIII slightly transverse, IX and X slightly transverse, XI much shorter than IX–X combined, about 1.5 × as long as broad, with rounded apex.

Pronotum ( Figs 115, 117–118 View FIGURES 115 – 117 View FIGURES 118 – 119 ) elongate, broadest in front of middle; PL 0.18 mm, PW 0.15 mm; punctures on disc ( Fig. 118 View FIGURES 118 – 119 ) small but distinct, separated by spaces 3–4 × as wide as diameters of punctures; setae poorly visible.

Elytra ( Figs 115 View FIGURES 115 – 117 , 118 View FIGURES 118 – 119 ) elongate oval, strongly convex, broadest in front of middle, EL 0.35 mm, EW 0.24 mm, EI 1.47; punctures similar to those on pronotum ( Fig. 118 View FIGURES 118 – 119 ); setae poorly visible.

Legs ( Figs 115–119 View FIGURES 115 – 117 View FIGURES 118 – 119 ) moderately long, slender, unmodified.

Etymology. The name microscopicus refers to the extremely small body of this species.

Remarks. Rovnoscydmus microscopicus is much smaller than R. frontalis (BL 0.64 vs. 0.88 mm) and has stouter elytra (EI 1.47 vs. 1.64); it also has much larger eyes than R. frontalis . These characters are sufficient to treat these taxa as separate species.

SIZK

Schmaulhausen Institute of Zoology

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Tribe

Glandulariini

Genus

Rovnoscydmus

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