Ocellotrella Gorochov, 2021

Gorochov, A. V., 2021, Taxonomy of Podoscirtinae (Orthoptera: Gryllidae). Part 14: the genera Ocellotrella gen. n. and Neozvenella from Madagascar, Russian Entomological Journal 30 (4), pp. 381-389 : 381-382

Genus Ocellotrella Gorochov , gen.n.

Type species Ocellotrella sharovae Gorochov , sp.n.

DIAGNOSIS. Body rather small and moderately thin for this subtribe. Head somewhat dorsoventrally flattened, with roundly angular rostrum in profile; scape almost twice as wide as rostrum between antennal cavities; lateral ocelli very large, contacting with each other along median line; median ocellus much smaller, oval, slightly obliterated, located before lateral ocelli on rostral dorsum ( Figs 1–2 ); maxillary palpus not very long (its fifth segment almost as long as height of eye), with distinctly but not strongly widened apical part. Pronotum barely longer than wide, insignificantly narrowing to head, with anterior and posterior edges of disc almost straight ( Fig. 2 ); lateral pronotal lobes moderately low

How to cite this article: Gorochov A. V. 2021. Taxonomy of Podoscirtinae ( Orthoptera : Gryllidae ). Part 14: the and with more or less rounded ventral edges ( Fig. 5 ). Metanotal gland developed only in male, not pubescent, with almost lamellar transverse fold in anterior part of metanotum, and with distinct median convexity narrower behind (near) this fold and gradually widening in more posterior part of metanotum ( Fig. 4 ). Legs rather short and slender, with open tympanum only on inner surface of fore tibia ( Fig. 3 ), and with armament of hind tibia usual for this sibtribe (i.e. spines and denticles of this tibia not reduced, not very large and not thickened). Male tegmina distinctly protruding beyond abdominal apex and apices of hind femora; dorsal field with developed but slightly reduced stridulatory apparatus in proximal half (this apparatus having transverse stridulatory vein, 3 slightly or barely arcuate oblique veins, rather small and irregular mirror, and 3 almost S-shaped chords) and with simple and slightly oblique branches in distal half ( Figs 14– 15 ); lateral field with narrow areas between Sc and M, with M and R fused with each other before middle of tegmen, and with rather numerous and somewhat oblique branches of Sc ( Fig. 15 ). Female tegmina similar to those of male, but dorsal field with simple and slightly oblique longitudinal veins only, and lateral field without fusion of M and R. Hind wings normally developed, longer than tegmina. Abdominal glands absent. Male anal plate rather short, with large and more or less flat median area, and with a pair of low transverse ridges before apex of this plate ( Fig. 34 ); male genital plate distinctly longer than anal plate, with distal part separated from its more proximal part by transverse fold and gradually narrowing to narrowly rounded (almost acute) apex; in female, these plates more simple in shape, similar to those of other females of this subtribe. Male genitalia: epiphallus longer than half of genital length, somewhat laterally compressed, with a pair of high and almost lamellar posteromedial processes directed upwards and located very near each other, with a pair of short and almost rectangular posterolateral projections, and with slightly asymmetrical anterior part ( Figs 20, 22 , 30 ); ectoparameres elongate, rather thin but with distinctly thinner and arcuate proximal parts ( Figs 21 , 31, 33 ); endoparameres also thin but shorter than ectoparameres, articulated with proximal parts of latters ( Figs 21 , 31 ); rachis semimembranous and narrow but rather high, with acute apical hook and rounded subapical concavity (this concavity small, visible only in profile, located above apical hook; Figs 21–22 , 31–32 ); formula consisting of a pair of vertical semisclerotized plates situated near each other and partly fused in ventral part ( Figs 21–22 , 31 ). Spermatophore with normal (large and round) ampulla, loop-like tubular anchor (attachment plate), and thin and long tube ( Fig. 23 ); these parts of spermatophore formed in special cavities of genitalia schematically shown in Fig. 32 (ampulla, in cavity before ventral fold; loop-like anchor, in mould around this fold and in cavity above this fold between semisclerotized plates of formula; tube, in mould between previous cavity and apex of rachis). Ovipositor normally developed, with drilling apical part having numerous small tubercles ( Fig. 36 ).

INCLUDED SPECIES. Type species only.

COMPARISON. The new genus is clearly distinguished from all the other genera of this subtribe by the lateral ocelli very large and contacting with each other, the median ocellus much smaller than lateral ones and located before them, and the male genitalia characteristic. These genitalia are somewhat similar to those of Eupodoscirtus Gorochov, 2004 and Fryerius in the epiphallus high (laterally compressed) and with rather short posterolateral projections, but these projections are much smaller in Eupodoscirtus and less distinct (almost undeveloped) in Fryerius , and the rachis is without any distinct apical hook in the both latter genera; from the other genera of Podoscirtina , the new genus differs in the following combination of genital characters: the epiphallus is higher, with the posteromedial processes distinctly longer or with the posterolateral projections clearly shorter and higher (wider); the rachis is not very large and not twisted in its distal part; the spermatophore is with the anchor rather long and distinctly loop-like (not short and simple), and with the tube much thinner and longer (for comparison see Figs 23 and 25, 28 ).

ETYMOLOGY. This generic name originates from the Latin morphological term “ocellus” and the generic name Malgasotrella (due to very large lateral ocelli).

Figures

Figs 1–13. Ocellotrella gen.n. and Neozvenella Gor., males: 1–5 — O. sharovae sp.n.; 6–8 — N. brunnea sp.n.; 9–11 — N. adunca sp.n.; 12–13 — N. paraucta sp.n.; 1, 6, 9 — head; 2, 5, 7, 10, 12 — head with pronotum and fore leg; 3 — proximal part of fore tibia with inner tympanum; 4, 8, 11, 13 — metanotal gland; 1, 6, 9 — frontal view; 2, 4, 7–8, 10–13 — dorsal view; 5 — lateral view. Рис. 1–13. Ocellotrella gen.n. и Neozvenella Gor., самцы: 1–5 — O. sharovae sp.n.; 6–8 — N. brunnea sp.n.; 9–11 — N. adunca sp.n.; 12– 13 — N. paraucta sp.n.; 1, 6, 9 — голова; 2, 5, 7, 10, 12 — голова с переднеспинкой и передней ногой; 3 — проксимальнаЯ часть передней голени с внутренним тимпанумом; 4, 8, 11, 13 — метанотальнаЯ желеЗа; 1, 6, 9 — спереди; 2, 4, 7–8, 10–13 — сверху; 5 — сбоку.

Figs 14–19. Ocellotrella gen.n. and Neozvenella Gor., males: 14–15 — O. sharovae sp.n.; 16 — N. brunnea sp.n.; 17 — N. adunca sp.n.; 18 — N. paraucta sp.n.; 19 — N. aucta Gor.; 14 — right tegmen in resting position; 15 — right tegmen in partly spreading position and right hind femur; 16–19 — right tegmen in completely spreading position; 14 — dorsal view; 15 — lateral view. Рис. 14–19. Ocellotrella gen.n. и Neozvenella Gor., самцы: 14–15 — O. sharovae sp.n.; 16 — N. brunnea sp.n.; 17 — N. adunca sp.n.; 18 — N. paraucta sp.n.; 19 — N. aucta Gor.; 14 — правое надкрылье в состоЯнии покоЯ; 15 — правое надкрылье в частично расправленном состоЯнии и правое Заднее бедро;16–19 — правое надкрылье в полностью расправленном состоЯнии; 14 — сверху; 15 — сбоку.

Figs 30–55. Ocellotrella gen.nov. and Neozvenella Gor.: 30–36 — O. sharovae sp.nov.; 37–42 —N. brunnea sp.nov.; 43–46 — N. adunca sp.nov.; 47–50 — N. paraucta sp.nov.; 51–55 — N. aucta Gor.; 30–31, 37–38, 43–44, 47–48, 51–52 — male genitalia with or without foreparts; 32 — rachis and scheme of sagittal section of more proximal part of male genitalia; 33, 40, 46, 50, 54–55 — left ectoparamere or its distal part; 34, 41 — male anal plate; 35, 42 — male genital plate; 36 — apical part of ovipositor; 39 — distal part of rachis; 45, 49, 53 — distal half of epiphallus; 30, 34, 37, 41, 43, 47, 51 — dorsal view; 31, 35, 38, 42, 44, 48, 52 — ventral view; 32–33, 36, 39–40, 45–46, 49–50, 53–55 — lateral view.

Figs 20–29. Ocellotrella gen.n. and Neozvenella Gor., male: 20–23 — O. sharovae sp.n.; 24–25 — N. brunnea sp.n.; 26 — N. adunca sp.n.; 27–29 —N.paraucta sp.n.; 20–22, 24, 26–27 — genitalia; 23, 25, 28 — spermatophore; 29 — left posterolateral projection of epiphallus and distal part of ectoparamere; 20 — dorsal view; 21 — ventral view; 22–28 — lateral view; 29 — lateral and slightly dorsal view. Рис. 20–29. Ocellotrella gen.n. и Neozvenella Gor., самец: 20–23 — O. sharovae sp.n.; 24–25 — N. brunnea sp.n.; 26 — N. adunca sp.n.; 27–29 — N. paraucta sp.n.; 20–22, 24, 26–27 — гениталии; 23, 25, 28 — сперматофор; 29 — левый Заднебоковой выступ Эпифаллуса и дистальнаЯ часть Эктопарамера; 20 — сверху; 21 — сниЗу; 22–28 — сбоку; 29 — сбоку и слегка сверху.