Gregorydytes, Giachino & Eberhard & Perina, 2021

Giachino, Pier Mauro, Eberhard, Stefan & Perina, Giulia, 2021, A rich fauna of subterranean short-range endemic Anillini (Coleoptera, Carabidae, Trechinae) from semi-arid regions of Western Australia, ZooKeys 1044, pp. 269-337 : 269

Gregorydytes gen. nov. Figs 8-9

Type species.

Gregorydytes ophthalmianus sp. nov.

Diagnosis.

Genus characterised by normal metatrochanters, elytra reduced at tip and lacking longitudinal grooves, 9th pore of the umbilicate series in normal position (placed after the 8th one) and two discal setae; basal border of pronotum remarkably narrower than anterior border and sides distinctly sinuate before the basal angles; aedeagus with median lobe subrectilinear, basal bulb extremely reduced and parameres bearing one apical seta. Labial tooth lacking.

Description.

Species small (TL mm 1.02-1.05) and anophthalmous. Integument depigmented, poorly sclerified, and covered with sparse pubescence.

Head of normal size, narrower than pronotum; mandibles short and simple, without hyperplasias. Maxillary palpi ovoidal, swollen. Labium transverse, articulated; mentum not fused with submentum. Labial tooth absent. Antennae moniliform, without particular features.

Pronotum slightly transverse, with sides distinctly sinuate at the basal third. Basal angles obtuse and rounded; basal border remarkably narrower than anterior border; presence of two marginal setae, the posterior one placed at the basal angles.

Elytra subrectangular and elongated, separately rounded, depressed and without longitudinal groove, and slightly truncated but not emarginated at apex. Elytral striae absent (except sutural stria). Lateral margin starting from the humeral area, distinctly crenulate to at least half-length. Scutellar pore present, large and umbilicate; umbilicate series of type B (sensu Jeannel 1963; Giachino and Vailati 2011); disc bearing two discal setae.

Legs relatively short and stumpy. Unarmed pro- and metafemora, normal metatrochanters, two dilated protarsomeres in the male.

Aedeagus small, median lobe short and subrectilinear with basal bulb extremely reduced. Parameres long, bearing one apical seta. Endophallus without sclerified phanerae.

Etymology.

Gregorydytes is a compound noun: in honour of Francis Thomas Gregory, the first European explorer who discovered Ophthalmia Range (type locality) in 1876, and dytes meaning diver in Greek. Gender name masculine.

Species included.

Only G. ophthalmianus sp. nov. belongs to this new genus.

Figures

Figures 8, 9. Gregorydytes ophthalmianus gen. et sp. nov., HT ♂ 8 habitus 9 aedeagus in lateral view. Scale bars: 0.1 mm.