Gramboale, 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 : 3

Genus GRAMBOALE gen. nov.

zoobank.org/ CFB5BF8C-442B-4397-9315-8CAEBAFDBB04

Type species. Gramboale prutenorum sp. nov.

Diagnosis. Gramboale can be differentiated from all other extant and fossil anamorphids by the following combination of characters: body comparatively large (length more than 3 mm), ovoid and convex, and dorsal surface without vestiture; procoxal cavities open externally; antennal club simple, symmetrical; pronotum finely bordered laterally, lacking lateral sulci and lateral carinae, and with posterior margin weakly bisinuate; elytra punctate-striate without explanate margins; tarsal claw with sharp internal tooth. Moreover, the new genus differs from fossil Discolomopsis Shockley, 2006 by not having explanate margins of elytra; an absence of dorsal vestiture; and by having 4-segmented tarsi. Gramboale can be distinguished from extant Rhymbomicrus Casey, 1916 by posterior pronotal margin not lobed medially; from Anamorphus LeConte, 1878 , Micropsephus Gorham, 1887 -99, and Bystus Guérin-Méneville, 1857 by an absence of lateral sulci on pronotum; and from Symbiotes Redtenbacher, 1849 , Clemmus Hampe, 1850 , and Exysma Gorham, 1887 -1899 by an absence of pronotal lateral carinae. The new genus clearly differs from Bystodes Strohecker, 1953 , Mychothenus Strohecker, 1953 , and Idiophyes Blackburn, 1895 by having glabrous elytra, and pronotum without lateral sulci; from Anagaricophilus Arrow, 1922 , Cyrtomychus Kolbe, 1910 , and Geoendomychus Lea, 1922 by having 11 segmented antennae, and absence of lateral pronotal sulci; from Dexialia Sasaji, 1970 , and Dialexia Gorham, 1887 -1899 by elytra with regular rows of punctures, and 11 segmented antennae. Among Anamorphidae Gramboale is most similar to Australian genus Erotendomychus Lea, 1922 in having pronotum bordered laterally and without sulci, mesoventrite with intercoxal process rounded and prominent anteriorly, tarsi 4-segmented, and 3-segmented antennal club; but it differs from Erotendomychus in short-oval body form, by elytral punctures forming regular or almost regular rows, by five abdominal ventrites, and absence of dorsal pubescence.

Etymology. The name of the new genus is derived from “gramboale” —“beetle” in the Old Prussian language. The gender is masculine.

Composition. The new genus is monotypic.