Macrogryllus canorus Gorochov, 2022

Macrogryllus canorus Gorochov, 2022 View in CoL

( Figs 1A View FIGURE 1 , 2A, 2G View FIGURE 2 , 3 View FIGURE 3 , 4A–F View FIGURE 4 , 5 View FIGURE 5 )

Macrogryllus canorus Gorochov, 2022: 10 View in CoL View Cited Treatment .

New material examined. EAST MALAYSIA • 1♂; Sabah State, Sinipung Hill, near Long Pasia ; N4.43658 E115.72371, 1322.0±7.0 m.a.s.l.; 20 November 2024, 18h26; calling at burrow; coll. M.K. Tan; SBH.24.172 ( ZRC) GoogleMaps .

Remarks. Our specimen from Sinipung Hill in Meligan is most similar to Macrogryllus canorus Gorochov, 2022 from Malay Peninsula by the general habitus ( Figs 4A–F View FIGURE 4 ) and the male genitalia ( Fig. 5 View FIGURE 5 ) (the pseudepiphallic paramere having its proximal (anterior) portion [ps] distinctly shorter [about as long as the apical (medial) sclerite (as)], the mesal lobe [ml] small and short but with similar membranous finger-like process at its apex, the posterodorsal sclerite [pds] narrow); but differs by the proximal (anterior) portion (ps) of the pseudepiphallic paramere narrower, distal portion with lateral margin more convex and the posterodorsal sclerite (pds) having a stouter apical lobule.

Our specimen differs from Macrogryllus ephippium ( Saussure, 1877) from Borneo (including Mount Trus Madi), Sumatra and Java by the less robust habitus ( Fig. 4 View FIGURE 4 ), shape of the pseudepiphallus (pseudepiphallic lophi in lateral view not tapering into a very slender and elongated apex, and posterior margin between the lobes more angularly concave rather than somewhat truncated) and shape of pseudepiphallic paramere (latter proximal (anterior) portion [ps] with distinctly less convex lateral edge (in ventral view), mesal lobe (ml) somewhat smaller and its posterodorsal sclerite (pds) thinner (narrower) and with longer apical lobule).

It also differs from Macrogryllus bicolor Chopard, 1930 from Borneo by the colouration (mostly dark brown or black rather than with its head and legs light brown) and larger size, as well as the shape of the pseudepiphallus (pseudepiphallic lophi in lateral view not tapering into a very slender and elognated apex, and posterior margin between the lobes more angularly concave rather than somewhat truncated) and the shape of pseudepiphallic paramere (lateral edge more convex rather than concave and its posterodorsal sclerite (pds) much slenderer and with a distinct apical lobule).

Considering the differences between our specimen from Sinipung Hill and Macrogryllus canorus are smaller than between ours and Macrogryllus ephippium and Macrogryllus bicolor , we postulate the differences observed between our specimen and Macrogryllus canorus from Malay Peninsula may represent infra-specific variations. Moreover, since Macrogryllus ephippium can be found across Sumatra and Borneo, it is not surprising that Macrogryllus canorus may occur across major land masses in both Malay Peninsula and Borneo. Genetic and bioacoustics data on these taxa may reveal that they represent subspecies or even species, but based solely on morphology, we think it is more appropriate not to describe a new species or subspecies for our specimen from Sinipung Hill.

Distribution. Malay Peninsula ( Pahang State: Fraser’s Hill), Borneo ( Sabah State: Sinipung Hill in Meligan [new locality record]).

Type locality. MALAYSIA: Pahang State: Fraser’s Hill (Bukit Fraser) .

Calling song ( 1♂, Figs 2A, 2G View FIGURE 2 ). See Results and Table 1.