Amplioscapus, Kirkendall, 2024

Kirkendall, Lawrence R., 2024, A new genus and species of Platypodini pinhole borers from South America (Coleoptera, Curculionidae, Platypodinae), Zootaxa 5432 (1), pp. 83-95 : 85

Amplioscapus , new genus urn:lsid:zoobank.org:act:13B1AE72-8D9C-4726-A3E0-544E1834FA75

( Figs 1 & 2 )

Type species. Amplioscapus mirabilis , new species, here designated.

Diagnosis. The genus belongs in the Curculionidae subfamily Platypodinae , tribe Platypodini Shuckard, 1840 ( Wood 1993; Alonso-Zarazaga & Lyal 2009). Placement in the Platypodini is supported by characters such as the head with a conspicuous pregular cleft and mouthparts with maxillae galea and lacinia fused, having a distinct femoral impression on the pronotum, and having a distinct posterior impression of the metanepisternum and metaventrite, all of which are typical of Platypodini genera but not of Tesserocerini genera ( Wood 1993; Kirkendall & Atkinson in press a).

The following characters readily separate Amplioscapus from current Neotropical Platypodini genera. Frons of female deeply, broadly concave, the upper frons being divided vertically by a short, low, broad carina; male frons less deeply concave. Antenna inserted near the top of the eye in females, just above the bottom of the eye in males. Antennal scape greatly expanded downwards (widened) in both sexes, in females the inner (lower) margin fringed with dense golden plumose setae. Pronotum of females with a pair of very large mycangial pores, these lacking in males. Male protibiae with seven complete or nearly complete transverse rugae. Anterior margin of the metanepisternal-metaventrite impression with a variable number of many small spines. Male elytra with interstriae 2 and 4 ending before mid-length of elytra, interstriae 5 terminating well before declivity; raised portions of oddnumbered interstriae serrate. Male and female ventrites simple, convex: no teeth or spines on ventrites 3, 4 or 5 of males as in Myoplatypus Wood , Oxoplatypus Wood or Costaroplatus Nunberg , respectively.

Etymology. From the Latin amplio -, enlarged or widened, plus - scapus, scape, referring to the uniquely wide scape on the antennae of both sexes. Masculine noun.

Figures

FIGURE 1. Amplioscapus mirabilis Kirkendall, male holotype. (A) Dorsal view. (B) Lateral view. (C) Frontal view. (D) Angled posterior view of declivity. (E) Ventral view.

FIGURE 2. Amplioscapus mirabilis Kirkendall, female allotype. (A) Dorsal view. (B) Lateral view. (C) Frontal view. (D) Angled posterior view of declivity. (E) Ventral view.