Macrogryllus ephippium ephippium ( Saussure, 1877 )

Gorochov, A. V., 2022, New and little known taxa of the genera Gymnogryllus and Macrogryllus (Orthoptera: Gryllidae: Gryllinae) from Indo-Malayan and Papuan Regions, Proceedings of the Zoological Institute of the Russian Academy of Sciences 326 (1), pp. 3-13 : 8-10

Macrogryllus ephippium ephippium ( Saussure, 1877)

= Brachytrypus (Macrogryllus) ephippium Saussure, 1877

( Fig. 22 )

Material studied. INDONESIA: 2 males, Southern Sumatra, Lampung Prov., Bukit Barisan Selatan National Park , 20–30 km WWN of Kotaagung Town, environs of Sukaraja Vill., 05 º 30–31´S, 104 º 25–27´E, ~ 600 m, primary forest in evening, during calling song near own burrow, 14–18 April 2009, A. Gorochov, M. Berezin, E. Tkatsheva ; 1 male, Borneo , East Kalimantan Prov., ~ 20 km N of Balikpapan City, Bukit Bangkirai Park , 01 º 01´43˝S, 116 º 51´49˝E, forest on hills in evening, in same conditions, 4–8 October 2015, A. Gorochov, M. Berezin, I. Kamskov, E. Tkatsheva . MALAYSIA: 3 males, Borneo , Sabah State, Trus Madi Mt , ~ 1000 m, primary/secondary forest in evening, in same conditions, 13–25 May 2007, A. Gorochov .

Note. This subspecies was originally described as a species with the following geographical data: “ Java?; l’Afrique?” ( Saussure 1877). This description contained only some species characters: the body is very large; its coloration is almost uniformly dark; the hind tibia has three pairs of dorsal spines (other than apical spurs); the male tegmen is with seven free longitudinal veins in the lateral field, with eight oblique veins in the dorsal field, and with a slightly longitudinal mirror. Later this species was redescribed by Chopard (1969) who assigned specimens to it only from Java and the Malay Peninsula; however, neither of these authors described or illustrated the male genitalia of this species. Possibly the Malay specimens may belong to another species of this genus which is described below as new one.

The general appearance of the above-mentioned males from Southern Sumatra and Borneo is almost

Abbreviations: aml — apex of mesal lobe; as — apical (medial) sclerite; bml — base of mesal lobe without most part of this lobe (26); m — membrane between mesal lobe and posterodorsal sclerite; ma — membranous area between apical and proximal sclerites (18, this area in G. egorovi sp. nov. semisclerotized; 19, this area in majority of other species of this genus perhaps secondarily sclerotized); ml — mesal lobe; pds — posterodorsal sclerite; pp — posterolateral projection at base of posterodorsal sclerite (19); ps — proximal (main) sclerite; spl — spine-like process at apex of mesal lobe (21), at apex of posterodorsal sclerite (26), and in place of their fusion (27).

identical to the description of M. e. vespertinus Gorochov, 2001 from Central Sumatra ( Gorochov 2001), including the presence of a rather large yellowish area on the apical part of the hind femur (this area almost completely occupying this apical part, except for a pair of darkened lateral spots); but these males differ from those of the latter subspecies in some small characters of the male genitalia: their ectoparamere is with the posterior portion shorter and having more convex medial edge, and with the anterior portion longer and more strongly narrowed near the posterior portion (for comparison see Figs 22 and 23 ). Also these males are in accordance to Saussure’s description and pictures, because the number of dorsal spines in their hind tibiae is somewhat varied (3:3; 3:4; 4:4; 4:5), and the male tegminal mirror is from slightly longitudinal to almost as long as wide; and it is highly probable that Javanese subspecies may also live in Southern Sumatra (these territories are faunistically very similar), although the presence of Javanese forest subspecies in Borneo is somewhat surprising.

Remark. The burrows of the above-mentioned calling males were very similar to those of M. e. vespertinus described previously ( Gorochov 2001: figs 193, 194).

Figures

Figs 18–33. Structures of male genitalia (schematically), left ectoparamere from below (18–27) and epiphallic apex from behind (28–33): 18 – Gymnogryllus egorovi sp. nov.; 19 – G. vietnamensis mada subsp. nov.; 20 – Phonarellus minor (Chop.); 21 – Tarbinskiellus portentosus (Drury); 22 – Macrogryllus ephippium ephippium (Sauss.); 23 – M. e. vespertinus Gor.; 24 – M. canorus sp. nov.; 25 – M. bicolor Chop.; 26 – Megalogryllus (Megalogryllus) excellens Gor.; 27 – M. (Gigantogryllus) neotropicus (Gor.); 28 – G. v. mada subsp. nov.; 29 – G. v. longidens Gor.; 30 – G. v. vietnamensis Gor.; 31 – G. sylvestris Gor.; 32 – G. obscurus Gor.; 33 – G. equinus Gor. [20, 21, 26, 27 – after Gorochov (2019); 29–33 – after Gorochov (2011).]