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.