Protrachyasmus Setliff, 2021

Setliff, Gregory, Pancini, Lorenzo & Bramanti, Andrea, 2021, Review of Eudyasmus, with descriptions of a new species from Waigeo Island, Indonesia, and a closely related new genus (Coleoptera: Curculionidae, Molytinae, Eudyasmini), Fragmenta entomologica 53 (2), pp. 377-390 : 388-389

Key to species of Eudyasmus Pascoe and Protrachyasmus Setliff gen. nov.

1. Rostrum longer than pronotum, apex evenly curved in males. Prosternal canal and mesoventral receptacle nearly obliterated. Profemora with small denticle on ventral margin near apex. Protibia weakly compressed in basal 1/3 only, dorsal and ventral margins sinuate, apical third strongly curved ventrad. Tarsomere 1 longer than tarsomeres 2+3 combined ( Papua New Guinea)................................................................... .... Protrachyasmus planidorsis (Heller, 1908) comb. nov.

- Rostrum shorter than pronotum, apex bent in males at insertion point of antennae. Prosternal canal with lateral sides carinate, mesoventral receptacle open posteriorly. Profemora edentate. Protibia strongly compressed throughout, dorsal margin straight to convex, apical third not strongly curved. Tarsomere 1 as long as tarsomeres 2+3 combined ( Eudyasmus Pascoe, 1885 ).......................................................................................2

2. Pronotum concolorous, without whitish oblique macula or longitudinal stripes. Elytral humeri darker than surrounding areas ( Papua New Guinea)............................ .................................................. E. simplex Heller, 1935

- Pronotum laterally with distinct oblique macula or longitudinal stripes of whitish scales.................................3

3. Base of elytra without yellowish-white transverse band; whitish oblique stripe on sides of pronotum visible in dorsal view near base; fine yellowish-white stripe running medially from apex of pronotum to tip of elytral along suture ( Papua New Guinea)................... ................................................... E. praecox Faust, 1898

- Base of elytra with yellowish-white transverse band; whitish oblique maculae or stripe on sides of pronotum not visible in dorsal view; medial stripe absent or incomplete, usually interrupted near scutellum, rarely complete......................................................................4

4. Whitish macula on sides of pronotum short, usually restricted to apical half of pronotum in lateral view, not reaching base. Pronotal disk with medial stripe that is sometimes faint or lost in basal half. Elytra with distinct transverse basal band and yellowish-white stripe on elytral suture ( Indonesia: Papua Province and Papua New Guinea)................................. .............................................. E. albertisii Pascoe, 1885

- Pronotum dorsally without any markings, laterally with whitish bands reaching the base. Elytra with yellowish-white transverse band at base but no sutural stripe ( Indonesia: Waigeo Island)............................................. ......................... E. basalis Pancini & Bramanti sp. nov.