Mirolotmia, Gorochov, 2021

Genus Mirolotmia View in CoL gen. nov.

Type species: Mirolotmia dinocephala sp. nov.

Diagnosis. Body moderately large to medium-sized. General appearance typical of Brachytrupina crickets digging burrows and having shortened tegmina, but with characteristic features list- ed below.

Head very large (much wider than pronotum) but not very high ( Figs 1, 3, 4 and 6), with rostrum between antennal cavities approximately twice as wide as scape and strongly convex (especially in lower portion near clypeal suture; Figs 2, 3, 5 and 6); lateral sides of epicranium obliquely flattened (head almost triangular in dorsal view, i.e. somewhat similar to that of Geogryllus mezai Gorochov, 2019 and Gigagryllus omayrae Cadena-Castañeda, 2020 ); eyes rather small and nearly flat (barely convex; Figs 1–6); genae under and behind eyes widened and finely wrinkled; mouthparts (except for palpi) rather short (low) and much narrower than epicranial width ( Figs 1 and 4); palpi rather long and thin (fifth segment of maxillary palpus distinctly longer than third one and much longer than fourth one).

A. V. Gorochov. A new genus and species of Gryllinae from Indonesia

Pronotum distinctly transverse, rather high, strongly widening to head, with anterior margin of disc slightly concave, posterior margin almost straight and ventral margins of lateral lobes barely oblique ( Figs 2, 3, 5 and 6). Tegmina far not reaching abdominal apex, with more or less parallel longitudinal venation in lateral field of male and in lateral and dorsal fields of female (crossveins in these fields almost undeveloped in male but distinct in female; Figs 2, 5 and 6); dorsal tegminal field of male with normally developed stridulatory apparatus (this apparatus having normal stridulatory and diagonal veins, rather small angulate mirror, a few S-shaped oblique veins, and distinct chords) but almost lacking apical area ( Fig. 3). Legs strong but not short; fore tibia having only outer tympanum which long and narrow; fore and middle tarsi somewhat shortened; hind femur well-adapted to jumping, distinctly longer than hind tibia; hind tibia and hind tarsus with normal spines and spurs, and with large basitarsal denticles. Anal and genital plates in both sexes simple, lobe-like. Cerci moderately long.

Male genitalia with epiphallus having three rather long posterior lobules ( Figs 7–9), ectoparameres very similar to those of Geogryllus but without fusion of mesal lobe apex with posterodorsal sclerite apex and without spine-like process at place of this fusion or at each of these apices ( Fig. 10), endoparameres having moderately wide upper (dorsal) apodemes and distinct but somewhat narrower lower (ventral) apodemes, virga thin and acute but not very long and having rather small apodeme at base, sacculus moderately large and having distinct but rather thin sclerotised semitube along its dorsal and anterior (and partly ventral) edges ( Figs 7–9). Ovipositor rather long, with apical part typical of Gryllini ( Fig. 6).

Included species. Type species only.

Comparison. The new genus is clearly distinguished from all other genera of Brachytrupina by the male genitalia with three rather long lobules on the posterior epiphallic part. Additionally, it differs from the type species of Cephalogryllus and Notosciobia in the virga (rachis) not project- ed behind the posteromedian epiphallic edge; from possibly synonymous Geogryllus , Gryllita and Rubrogryllus , in the absence of spine-like processes at the apices of the ectoparameral mesal lobes and of the ectoparameral posterodorsal sclerites; from Gigagryllus , in the dorsal tegminal field of male not shorter than lateral one ( vs. clearly shorter than lateral field), and the hind tibia having spines in both distal and proximal halves ( vs. only in distal half); from Tympanogryllus Gorochov, 2001 , in the much less numerous oblique veins in the male tegminal stridulatory apparatus; and from other indisputable or possible genera of this subtribe, in the following characters: a different head shape, strongly shortened tegmina in both sexes, and/or a more complex structure of the ectoparameres in the male genitalia.

Etymology. The new genus is named in honour of the collectors of its type species, M. Mironov and E. Lotmentseva. Gender is feminine.