Lampygnatha, Pineda & Koike & Barros, 2019

Pineda, Cristian R., Koike, Ricardo M. & Barros, Rafael C., 2019, A new genus and species of Stigmoderini Lacordaire, 1857 (Coleoptera: Buprestidae: Buprestinae) from Southeast Brazil with notes on its hypothesized mimicry complex, Zootaxa 4686 (4), pp. 542-550 : 543

Lampygnatha gen. nov.

( Figs. 5–11 )

Type species. Lampygnatha ikuoi sp. nov., here designated.

Diagnosis. Body medium, dorsal side glabrous. Pronotum broader than elytra, with a globiform, lateral projection. Elytra without striae, each elytron with a single longitudinal costa.

Description. Head. Mouthparts prolonged into rostrum (prognathous). Antennae serrate from 4th antennomere; clypeus with anterior margin medially emarginated; labrum small, transverse. Pronotum. broader than elytra; lateral margins diverging strongly from base in a more or less straight line to a globiform projection about ⅓ from base. Scutellum . Pentagonal, excavate on disc. Elytra. without striae, each elytron with a single longitudinal costa. Venter. Prosternal process flat, without anterior prominence; legs with tibiae with a pair of short spurs at the apex. Aedeagus. Strongly sclerotised; relatively wide.

Comparison: Lampygnatha gen. nov. is similar to the extant genera Semiognatha and Conognatha (Pithiscus) in having the mouthparts prolonged into rostrum and the prosternal process flat, without anterior prominence, but differs in the following ways: Lampygnatha has the elytra punctate-rugose, without striae; each elytron has a single longitudinal costa with a row of punctures; and the pronotum is strongly broader than elytra, laterally with distinct globiform projections. In contrast, Semiognatha and Conognatha (Pithiscus) has the elytra punctate, with around 9 striae, each with a row of punctures and with around 10 interstriae without a rows of punctures; interstriae can be flat or convex (weakly costate) or alternate between the two, but not with just a single costa as in Lampygnatha ; the pronotum is narrower or only slightly broader than the elytra and with lateral margins without distinct projections.

Etymology: The generic name is a contraction and combination of “ Lampyridae ” and the Greek adjective “ prognathous ” (having a projecting lower jaw) in reference to the resemblance of the new taxon with some species of Lampyridae and the mouthparts prolonged into rostrum, as in the genera Conognatha and Semiognatha .

Figures

FIGURES 5–11. Lampygnatha ikuoi gen. and sp. nov. Holotype male: 5, Dorsal view; 6, Ventral view; 7, Aedeagus, Ventral view; 8, Labels; 9, Frontal view; 10, Perspective view; 11, Lateral view.