Najtaecesa loretensi

Desutter-Grandcolas, Laure, 2017, Najtaecesa n. gen., a trigonidiine-like Cearacesaini Koçak & Kemal, 2010 cricket from the Amazonian rainforests (Grylloidea, Gryllidae, Hapithinae), Zoosystema 39 (1), pp. 117-124 : 122-123

Najtaecesa loretensi s n. sp.

( Figs 1 G-I; 2G-I; Table 2)

TYPE LOCALITY. — Peru, Loreto, Ampiyacu, Estiron.

TYPE MATERIAL. — Holotype. Peru, Loreto, Rio Ampiyacu, Estiron , X.1981, fn 20 (S. Poulain), MNHN-EO-ENSIF4208. Specimen not in good condition, PI and PII missing, antennae broken, coloration probably altered (specimen entirely light brown with few contrasted orange brown marks, see below).

ETYMOLOGY. — Species named after type locality, in Loreto district.

DIAGNOSIS. — Species close to N. aratayensis n. gen., n. sp., from which it can be separated by its male genitalia (size, shape of lophi and ventral plate of pseudepiphallus; ectophallic invagination), and putative coloration.

iod Lpron wpron LFW LHW LFIII LTIII

Male holotype 1.4 1.2 2.1 9 12.9 7.8 7

DESCRIPTION

Head shape, hind legs (FIII shape, TIII shape and spurs, tarsi), pronotum shape (but DD anterior margin slightly concave), and male FW venation as in genus definition. TIII with five subapical spurs on each side. Inner serrulation: no spine between dorsal apical spur and subapical spur 1; one or two spines between subapical spurs 1 and 2; one spine between subapical spurs 2 and 3; two or three spines between subapical spurs 3 and 4; three spines between left subapical spurs 4 and 5; 11 spines above last (proximal) subpical spur. Outer serrulation: no spine between dorsal apical spur and subapical spur 1, and between subapical spurs 1 and 2; one or two spines between subapical spurs 2 and 3; two or three spines between subapical spurs 3 and 4; four spines between subapical spurs 4 and 5; 17 (left) and 19 (right) spines above last (proximal) subapical spur.

Coloration ( Fig. 1 G-I)

Specimen very light brown, with darker pattern: lateral margin of pronotum DD orange brown, head abundantly marked with orange brown.

Male

FW coloration homogeneous, with contrasted orange brown bands along FW lateral margins ( Fig. 1G ). Subgenital plate longer than wide.

Male genitalia ( Fig. 2 G-I)

Large compared to N. aratayensis n. gen., n. sp. Pseudepiphallic lophi strongly diverging from the base, thin, and strongly narrowed at midlength; distal margin of pseudepiphallic ventral plate concave but only slightly conical; pseudepiphallic parameres wider than in N. aratayensis n. gen., n. sp., abruptly narrowed before apex; ectophallic apodemes thin, emerging from lower parts of ectophallic invagination.

Measurements (in mm).

See Table 2.

Figures

FIG. 1. — Najtaecesa n. gen.: A-F, Najtaecesa aratayensis n. gen., n. sp.; G-I, Najtaecesa loretensis n. gen., n. sp.: A, G, male holotype, dorsal views; B, H, face, front views;C, Head and pronotum,lateral view;D, head, dorsal view;E, I, FIII outer side,lateral views;F, metanotum,dorsal view (wings apart).Scale bars:1 mm.

FIG. 2. — Najtaecesa n. gen.:A-F, Najtaecesa aratayensis n. gen.,n. sp.;G-I, Najtaecesa loretensis n.gen., n. sp.: A, maxillary palpus;B, C, ♂ FW,dorsal and lateral fields, coloration as on Fig. 1A, C; D-I, ♂ genitalia, dorsal (D, G), ventral (E, H), lateral (F, I) views. Abbreviations: see Material and methods. Scale bars: 1 mm.