Telmatophilus sidorchukae, Lyubarsky & Perkovsky, 2020

Lyubarsky, G. Yu. & Perkovsky, E. E., 2020, First Rovno amber species of the genus Telmatophilus (Coleoptera: Clavicornia: Cryptophagidae) from Veselukha floodplain, Invertebrate Zoology 17 (1), pp. 25-35 : 27-31

publication ID	https://doi.org/10.15298/invertzool.17.1.03
DOI	https://doi.org/10.5281/zenodo.15484678
persistent identifier	https://treatment.plazi.org/id/571BD672-1B5A-FF93-B8DC-FDBBFE0DFA1A
treatment provided by	Felipe
scientific name	Telmatophilus sidorchukae
status	sp. nov.

Treatment

Telmatophilus sidorchukae sp.n.

Figs 1 View Fig , 2 View Fig .

MATERIAL. Holotype, SIZK No LKV-35, Rovno amber, Priabonian. Sex of the holotype: unknown . Syninclusions SIZK No LKV-32: 2 Diptera ( Phoridae, Sciaroidea ); SIZK No LKV-33: 2Collembola, Symphypleona; SIZK No LKV-34: Coleoptera, Collembola (Entomobryomorpha) ;SIZKNoLKV-36:Collembola (Symphypleona); SIZK No LKV-37: Coleoptera, Collembola (Entomobryomorpha) ; SIZK No LKV-38: 2 Acari; SIZK No LKV-39: Collembola (Entomobryomorpha); SIZK No LKV-40: Collembola (Symphypleona), Acari; SIZKNoLKV- 41: 2Collembola (Symphypleona),2Acari; SIZK No LKV-42: Acari; SIZK No LKV-43: Diptera ( Keroplatidae ); SIZK No LKV-44: Acari (Oribatei); SIZK No LKV-45: Psocoptera.

DIAGNOSIS. This new fossil species differs from extant congeners by a combination of: small body size; comparatively long antenna, 3 rd, 4 th and 5 th antennomeres more than twice as long as wide, 10 th antennomere not transversal, 11 th long-oval; distance between middle coxae half diameter of middle coxae; distance between metacoxae about five times as wide as between procoxae, approximately equal to diameter of posterior coxa.

DESCRIPTION. 1.7 mm long. Body black, elongate oval, parallel-sided, moderately convex dorsally, subflattened ventrally; covered with confused puncturation; short, decumbent pubescence ( Figs 1A View Fig , 2 View Fig ).

Head with slightly convex anterior margin, comparatively large and prominent eyes, without frontoclypeal suture. Antennae about one and a third as long as head width, about 2.5 times as long as antennal club, reaching base of pronotum. 1 st antennomere oval, 1.6 times as long as wide, 2 nd, in 1.4 times as long as wide, 3 rd, 4 th, and 5 th, 2 times as long as wide, 6 th, 1.7 times as long as wide, 7 th, 1.5 times as long as wide, 8 th subquadrate, club 3-segmented, elongate, slightly loose, consisting of comparatively large, not transverse segments: 9 th antennomere elongated trapezoid, 1.3 times as long as wide, 10 th antennomere subquadrate, 11 th elongated oval, 1.8 times as long as wide ( Fig. 1B View Fig ).

Pronotum about 1.7 times as wide as long, greatest width at posterior third of its length, arcuately narrowing both anteriorly and posteriorly, gently sloping at sides, anterior margin straight, anterior angles rounded, lateral margin evenly weakly serrate, posterior angles almost pointed, posterior margin slightly concave, with weak median lobes. Pronotum without sublateral lines, median fold. Pronotal basal pits present, connected by a groove. Prosternum moderately long, with process comparatively wide, somewhat narrower than antennal club, subparallelsided, truncate, slightly widened at apex. Procoxae closed posteriorly, oval and slightly transverse. Metasternal projection almost reaching middle of length of middle coxa. Distance between middle coxae twice less than diameter of middle coxa ( Fig. 1B,D View Fig ). Metasternum with median longitudinal line. Metaventrite about as long as prosternum, mesoventrite combined, its posterior edge between coxae angulate. Distance between metacoxae about five times as wide as that between procoxae, approximately equal to diameter of posterior coxa ( Fig. 1D View Fig ). Tarsomeres distinctly lobed, tarsal formula 555.

Elytra about 1.6 times as long as wide combined, slightly arcuate at sides, slightly wider than pronotum, apparently gently sloping at sides, their apices seeming to together forming a single arc. Epipleura moderately narrow, reduced, almost reaching 1 st ventrite of abdomen.

Ventrite 1 almost as long as ventrites 2–4 combined ( Fig. 1C View Fig ); hypopygidium widely rounded at apex. Hypopygidium protrudes from under the elytra; this sometimes occurs in Telmatophilus , especially often in females.

ETYMOLOGY. The new species is named in honor of Ekaterina A. Sidorchuk.

REMARKS. In one species of the genus ( T. americanus LeConte ), there is sexual dimorphism in leg morphology, in particular in the hind tibia. However, European species of the genus developing on cattails do not have this dimorphism precluding determination of the sex of the amber specimen.