Magnanillus Baehr, 2017

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

Magnanillus Baehr, 2017 Figs 15-17 , 18-20 , 21-23 , 24-26 , 27-29

Macranillus Baehr & Main, 2016: 61.

Magnanillus Baehr, 2017: 237.

Type species.

Macranillus bennetti Baehr & Main, 2016: 61.

Diagnosis.

This genus is characterised by: metatrochanters very long and sharp; metafemora dentate; elytra not reduced at tip; elytral disc with longitudinal grooves and bearing three setae; 9th pore of the umbilicate series in normal position (placed after the 8th one); aedeagus with median lobe gently curved, size of basal bulb normal and parameres bearing two apical setae. Labial tooth lacking. Differs from Pilbaraphanus by the presence of a longitudinal elytral grooves and the lack of labial tooth.

Note.

The description of this genus by Baehr and Main (2016) (sub Macranillus ), although very accurate, does not consider some peculiar characters present in species belonging to Macranillus , in particular: the elytral chaetotaxy, the absence of labial tooth, the presence of teeth on the posterior margin of metafemora, and the elongated and sharpened shape of the metatrochanters. The presence of the last two characters in Magnanillus was confirmed (M. Baehr pers. comm. 2018). The genus is redescribed below.

Redescription.

Species of medium-large size (TL mm 1.44-2.51) and anophthalmous. Integument depigmented but well sclerified and covered with sparse pubescence.

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

Pronotum subquadrate, with sides not, or only slightly, sinuate at the basal third, smooth or denticulated before basal angles. Basal angles right or obtuse, sharp, not rounded; base as wide as, or only slightly narrower, than anterior margin; presence of two marginal setae, the posterior one placed just before the basal angles.

Elytra subrectangular and elongated, separately rounded, not truncated and not emarginated apically; depressed, with a longitudinal groove. Elytral striae absent (except sutural stria). Lateral margin, starting from the humeral area and distinctly crenulate up 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 three discal setae.

Legs relatively short and stumpy. Profemora unarmed; metafemora dentate on the posterior edge, metatrochanters very long and sharp, two dilated protarsomeres in the male.

Aedeagus relatively large, median lobe long and slightly curved, with basal bulb of normal size. Parameres long, each bearing two apical setae. Endophallus with poorly sclerified phanerae.

Species included.

Currently ten species belong to this genus:

Magnanillus firetailianus sp. nov.

Magnanillus quartermaini (Baehr & Main, 2016)

Magnanillus sabae sp. nov.

Magnanillus salomonis sp. nov.

Magnanillus regalis sp. nov.

Magnanillus serenitatis sp. nov.

Magnanillus bennetti (Baehr & Main, 2016)

Magnanillus pearsoni (Baehr & Main, 2016)

Magnanillus maini (Baehr & Main, 2016)

Magnanillus magnus (Baehr & Main, 2016)

Note.

The key to species of Magnanillus Baehr, 2017 lack clear information on important diagnostic characters such as metafemora and metatrochanter morphology (see genus redescription). For the identification of the described species of Magnanillus refer to Baehr and Main (2016).

Figures

Figures 15 - 17. Magnanillus firetalianus sp. nov., HT ♂ 15 habitus 16 right metafemur and metatrochanter in ventral view 17 aedeagus in lateral view. Scale bars: 0.1 mm.

Figures 18 - 20. Magnanillus sabae sp. nov., HT ♂ 18 habitus 19 right metafemur and metatrochanter in ventral view 20 aedeagus in lateral view. Scale bars: 0.1 mm.

Figures 21 - 23. Magnanillus salomonis sp. nov., HT ♂ 21 habitus 22 left metafemur and metatrochanter in dorsal view 23 aedeagus in lateral view. Scale bars: 0.1 mm.

Figures 24 - 26. Magnanillus regalis sp. nov., HT ♂ 24 habitus 25 right metafemur and metatrochanter in ventral view 26 aedeagus in lateral view. Scale bars: 0.1 mm.

Figures 27 - 29. Magnanillus serenitatis sp. nov., HT ♂ 27 habitus 28 right metafemur and metatrochanter in ventral view 29 aedeagus in lateral view. Scale bars: 0.1 mm.