Giltine ampeensis, Alekseev & Tomaszewska, 2018

Alekseev, Vitalii I. & Tomaszewska, Wioletta, 2018, New handsome fungus beetles (Coleoptera: Coccinelloidea: Anamorphidae, Endomychidae) from European amber of the Upper Eocene, Palaeontologia Electronica (6 A) 21 (1), pp. 1-23 : 9-10

Giltine ampeensis sp. nov.

Figure 3.4-6

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Type material. Holotype: No. AWI-133 [ CVIA]. Sex unknown. The complete beetle inclusion is preserved in a polished, small, triangular piece of transparent amber, yellowish in color (total measurements are 9 x 7 x 4 mm). Syninclusions include four stellate hairs. The piece was obtained from a commercial source in the Yantarny settlement (Kaliningrad region) in August 2015. It was polished by hand, thus allowing dorsal and lateral views of the included beetle.

Type strata. Baltic amber. Eocene.

Type locality. Russia, Kaliningrad region, the Sambian (Samland) peninsula, Yantarny settlement (formerly Palmnicken) .

Etymology. The species name “ampeensis ” is derived from “Ampe”—the old name of Palmnicken (now Yantarny settlement).

Diagnosis. As stated for new genus.

Description. Body length 1.7 mm; width (at widest point in anterior one-third of elytra) 1.25 mm. Broadly oval, dorsally convex habitus; dorsal surface shiny, with long, curved setae; body uniformly dark, almost black, with tarsi slightly lighter.

Head retracted into prothorax to point of compound eyes, pubescent. Eyes rounded, prominent. Antennae relatively long, extending to base of elytra; with loose club composed of three antennomeres. First antennomere of antennal club elongate; second antennomere of antennal club as long as wide; terminal antennomere symmetrical, oblong, and pointed.

Pronotum transverse (2.5 times as wide as long), widest within posteriormost one-third of length; bordered laterally and anteriorly. Lateral carinae long, arcuate, spanning posterior two-thirds of pronotal length. Pronotum covered with sparse and large setiferous punctures. Distance between punctures 3–5 times as large as diameter of each puncture. Setae long, curved, semirecumbent. Pronotal posterior margin biconcave.

Elytra rounded, convex, wider than base of pronotum, with long pubescence, with margins explanate and strial punctures arranged in almost regular rows. Distance between punctures in row 1.5–2.0 times as large as diameter of each puncture. Spaces between rows (interstices) with regular setiferous punctures (slightly smaller than punctures in rows). Setae on elytra semirecumbent, long, arranged in rows on interstices, as long as distance between setae. Scutellum visible, rounded, impunctate, transverse (1.5 times wider than long).

Legs with femora flattened. Tibiae slender. Tarsi long, with simple cylindrical segments. Tarsal formula 4-4-4. Metatarsomeres 1 and 4 longest, 1.5 times longer than metatarsomeres 2 or 3. Tarsal claws 0.3 times as long as tarsomere 4, simple, symmetrical.

Remarks. The specimen is obscured ventrally by milky foam within the surrounding amber, and it is impossible to determine the number of ventrites, the length of epipleura, the details of ventral side of thorax, and the number and form of antennomeres of antennal stalk; the antenna consists of 10 or 11 antennomeres. Genitalia are internal and obscured in this specimen, and are generally impossible to differentiate in specimens embedded in amber.

Figures

FIGURE 3. Anamorphids from Baltic amber. 1-3, Palaecoryphus viktori gen. et sp. nov. (No. 1222-3 [CCHH], holotype), habitus in left lateral (1), dorsal (2), and right lateral (3) views. 4-6, Giltine ampeensis gen. et sp. nov. (No. AWI- 133 [CVIA], holotype), a reconstruction of the habitus in dorsal view (4) and habitus in dorsal (5) and ventro-lateral (6) views.

FIGURE 4. Anamorphid and Endomychid from Baltic amber. 1-3, Symbiotes borussiaeorientalis sp. nov. (No. 1799-2 [CCHH], holotype), habitus in dorso-lateral (1) and ventro-lateral (2) views, and a reconstruction of the habitus in dorsal view (3). 4, Laima andreei gen. et sp. nov., a reconstruction of the habitus in dorsal view.

FIGURE 5. Endomychids from Baltic and Bitterfeld ambers. 1-3, Laima andreei gen. et sp. nov. (No. 1222-5 [CCHH], holotype), habitus in lateral (1), dorsal (2), and ventral (3) views. 4-5, Trochoideus koenigsbergicus sp. nov. (No. 1506-1 [CCHH], holotype), habitus in dorsal view (4), and antenna in lateral view (5). 6-7, Trochoideus resinatissimus sp. nov., antenna (6) and maxillary palp (7) in lateral views.

FIGURE 6. Endomychids from Bitterfeld and Baltic ambers. 1-2, Trochoideus resinatissimus sp. nov. (No. 53-2 [CCHH], holotype), habitus in dorsal view (1), and forebody in ventral view (2). 3-5, Glesirhanis bercioi Shockley and Alekseev, 2014 (No. 1219-2 [CCHH]), habitus in dorsal (3), ventro-lateral (4), and lateral (5) views. 6-7, Phymaphoroides antennatus Motschulsky, 1856 (No. 1219-3 [CCHH]), close-up of antenna (6), and habitus in dorso-lateral view (7).