Ectecous lamelliferus Desutter-Grandcolas, 2020

Desutter-Grandcolas, Laure & Faberon, Léo, 2020, Phalangopsidae crickets (Orthoptera, Grylloidea) from the Mitaraka biological survey, French Guiana, Zoosystema 42 (32), pp. 739-797 : 783-784

Ectecous lamelliferus Desutter-Grandcolas , n. sp.

( Figs 26 , 27 ; Table 19)

urn:lsid:zoobank.org:act:BCBABC04-B038-4D9F-B2E0-8463E9B6D069

TYPE LOCALITY. — French Guiana, Monts Tumuc-Humac, Massif du Mitaraka.

TYPE MATERIAL. — Holotype by present designation. French Guiana • 1♂; Monts Tumuc-Humac , Massif du Mitaraka, D2; 54.451125 O 2.234786 N; alt. 300 m; 23.II.-10.III.2015; F. Legendre & S. Hugel leg.; fn. SH028, de nuit; MNHN-EO-ENSIF10794 .

Paratypes: 2 males. French Guiana • 2 ♂; Monts Tumuc-Humac , Massif du Mitaraka, vers sommet en Cloche; entre 54.4541 O 2.2349 N et 54.4646 O 2.2329 N; alt. entre 370 m et 470 m; 23.II.-10.III.2015; F. Legendre & S. Hugel leg.; fn. SH422, SH423, de nuit; MNHN-EO-ENSIF10795, 10796 .

ETYMOLOGY. — Species named after the lamella-shape of pseudepiphallic apical lobes in male genitalia.

DIAGNOSIS. — Species very close to E. tenebrosus Desutter-Grandcolas, 1992 by its size, coloration, male FW size and venation, but separated from that species by male genitalia (as in E. tenebrosus , except for lamella-shaped dorsal valves), its slightly more narrow FWs (length/width ratio 1.42, n= 3, against 1.53, n = 6, in E. tenebrosus ), with fewer stridulatory teeth (232 against 259-264, n = 6, mean 262, in E. tenebrosus ).

DESCRIPTION

In addition to the character of the genus.

General morphology

Size only slightly bigger than E. tenebrosus . Fastigium, ocelli and palpi as in E. tenebrosus ; with lateral ocelli separate by a distance shorter than their own width.

Coloration

General coloration as on Fig. 26 . Face as in E. tenebrosus : black, with reversed Y-shaped line under median ocellus, a small yellow spot under antennal pit (in an area with many long setae), and a wider yellow area under lower angle of eye; but median yellow line thinner between antennal pits and spot under anterior angle of eye smaller ( Fig. 27A ). Maxillary palpi as in E. tenebrosus , but article 5 darker ( Fig. 27A ). Vertex ( Fig. 27B ) as in E. tenebrosus , with the most lateral yellow lines (behind the eyes) prolonged as a semi-circular line on the occiput (unnoticed in E. tenebrosus description). Pronotum ( Fig. 27B, C ) and legs ( Fig. 26 ) as in E. tenebrosus .

Male

FWs covering abdomen up to half supra anal plate, as in E. tenebrosus . Venation ( Fig. 27D ): harp with 6 – 8 veins, mirror crossed by 4 – 5 concentric veins. Stridulatory file with 232 teeth (n=1). Subgenital plate short, truncated apically. Distal margin of supra anal plate with many long and thick setae ( Fig. 27E ).

Male genitalia ( Fig. 27 F-H)

Pseudepiphallic sclerite, rami, ectophallic apodemes, ectophallic fold (short and bifid) and endophallic apodeme as in E. tenebrosus (see Desutter-Grandcolas 1992b, Figs 59-61), but dorsal valves wide and thick, having the shape of nearly vertical lamellas ( Fig. 27H ), with sharp, curved denticles on lower margin ( Fig. 27G ); median lophi (= apical lobes) entirely membranous ( Fig. 27F, G ), convex on outer side, concave with abruptly vertical base on inner side.

Female

Unknown.

Measurements (in mm)

See Table 19.

Figures

FIG. 26. — Ectecous lamelliferus Desutter-Grandcolas, n. sp., male paratype MNHN-EO-ENSIF10795 foraging at night on a tree trunk. Photos: Sylvain Hugel.

FIG. 27. — Ectecous lamelliferus Desutter-Grandcolas, n. sp., male holotype MNHN-EO-ENSIF10794: A, face; B, C, head and pronotum in dorsal (B) and side (C) views; D, forewings, dorsal view; E, supra anal plate, dorsal view (arrow showing distal setae); F-H, male genitalia in dorsal (F), ventral (G) and side (H) views. Abbreviations: see Material and methods. Scale bars: B, C,1 mm; D, E, 0.5 mm.