Poinarelektronmiles ellenbergeri, Fanti & Damgaard, 2020

Fanti, Fabrizio & Damgaard, Anders Leth, 2020, Fossil soldier beetles of the Anders Damgaard amber collection. Fourth update, Baltic Journal of Coleopterology 20 (2), pp. 125-139 : 132

Poinarelektronmiles ellenbergeri sp. nov.

( Figs. 7 - 8 )

Holotype. Male, in Burmese amber, accession No. ALDC0578 /ALD.Bu.221

Type locality. Myanmar: Kachin state, Myitkyina District, Tanai Township, Hukawng Valley.

Type horizon. Lowermost Cenomanian (98.79 ± 0.62 Ma), mid-Cretaceous.

Differential diagnosis. No other species of this genus is currently known. See diagnosis of the new genus.

Description. Adult, winged, slender. Male, defined on the basis of the last ventrite elongated and emarginate apically, with larger and rounded apically last tergite. Body length about 3.2-3.4 mm (the head is folded). Brown-testaceous with blackish elytra.

Head rounded, not constricted posteriorly, with small depressions anteriorly, fitted with shallow punctuation. Eyes prominent, large, globular and roundish, inserted in the lateral part of the head. Mandibles short, falciform, apparently without teeth. Maxillary palps 4-segmented with the last palpomere very elongated and slightly securiform, rounded apically. Labial palps 3-segmented, with the last palpomere securiform. Antennae 11-segmented, pectinate, relatively short, reaching the half of elytra, antennal insertion in the upper part of the head (on the clypeus after the eyes); scape elongated, robust, club-shaped; antennomere II short, globular, about 2.5 times shorter than scape; antennomere III slightly longer than second, robust and apically equipped with a long and thin antennal process inserted ventrally; antennomeres IV-IX sub-equal, elongated and thin, each apically equipped with an antennal process which is very long and thin and rounded apically; antennomere X filiform, without rami, as long as the previous ones; antennomere XI filiform, rounded apically; all the antennomeres with short pubescence. Pronotum sub-quadrate, flat, slightly wider than head, anterior margin rounded and bordered, posterior margin straight and bordered, sides straight, posterior corners obtuse, pronotum disc smooth. Scutellum triangular-shaped, rounded at apex. Elytra long, covering and slightly surpassing the last abdominal segments, wider than pronotum, humeral zone very slightly larger, parallel-sided posteriorly, thin apically and rounded, surface with punctures in relief and arranged in confused striae. Posterior wings slightly infuscate, as long as elytra. Sternum elongated, rounded apically, ventrites wide and transverse and rounded at sides, last tergite wide and rounded apically, last ventrite elongated and emarginate apically. Legs thin, covered with little pubescence; coxae massive; trochanters triangular-shaped, with rounded apex; femora slightly curved, slightly robust than tibiae; tibiae thin, cylindrical, without spur near the apex, as long as femora. Tarsal formula 5-5-5; first tarsomere long; second tarsomere shorter than first; third tarsomere almost triangular; fourth strongly bilobed; fifth tarsomere elongated, thin, flat and curved; claws simple.

Etymology. Named in honor of Sieghard Ellenberger (Kassel, Germany), our friend.

Syninclusions. Air bubbles and few botanical remains.

Remarks. The amber piece has a half-moon shape and measures approximately 15 x 9 mm. The inclusion is complete with folded legs.

Figures

Fig. 7. Poinarelektronmiles ellenbergeri gen.et sp. nov.ALDC0578/ALD.Bu.221 in Burmese amber. A: Holotype, dorsal view, bar = 0.5 mm; B: Holotype, ventral view, bar = 0.5 mm.

Fig. 8. Poinarelektronmiles ellenbergeri gen.et sp. nov.ALDC0578/ALD.Bu.221 in Burmese amber. A: Holotype, detail of antennae, bar = 0.3 mm; B: Holotype, detail of elytra, bar = 0.5 mm; C: Holotype, detail of pronotum (ventral view) and metasternum, bar = 0.3 mm; D: Holotype, detail of last ventrites, bar = 0.3 mm.