Stenoecanthus planixiphus, Campos & Desutter-Grandcolas, 2020

Campos, Lucas Denadai De & Desutter-Grandcolas, Laure, 2020, The Paroecanthini crickets (Orthoptera: Grylloidea: Gryllidae: Oecanthinae) from French Guiana, Zoosystema 42 (20), pp. 355-398 : 389-393

Stenoecanthus planixiphus n. sp.

( Figs 1E, F ; 30-32 )

urn:lsid:zoobank.org:act:BD8F396C-4D4B-4F6B-9790-A1848DC49810

TYPE LOCALITY. — Mitaraka, French Guiana.

ETYMOLOGY. — Species named after the flat lateral expansions of its ovipositor dorsal valves.

TYPE MATERIAL. — Holotype. French Guiana • ♂; Monts Tumuc- Humac, Massif du Mitaraka, Layon A; 54°45’09”O, 2°23’57”N; 280 m – 54°45’47”O, 2°24’05”N; 365 m; 23.II.2015 - 10. III.2015; F. Legendre & S. Hugel leg.; night; specimen photographed in copula ( Fig. 1F ); Planète revisitée Guyane 2015; 2015 GUY SH 551; MNHN-EO-ENSIF10915; MNHN.

Allotype. French Guiana • ♀; Monts Tumuc-Humac , Massif du Mitaraka; 54°44.768”O, 2°23.549”N (C100); 350 m – 54°44’19”O, 2°23’366”N (C1000); 415 m; 23.II.2015 - 10.III.2015, F. Legendre & S. Hugel leg; night; specimen photographed in copula ( Fig. 1F ); Planète revistée Guyane 2015; 2015 GUY SH 169; Molec 2015 LDG 518; MNHN-EO-ENSIF10916; MNHN.

Paratype. 1♂, 2♀. French Guiana • 1♂; Sinnamary ; Jul. 1977; M. Descamps leg.; MNHN-EO-ENSIF10917; MNHN . • 1♀; Monts Tumuc-Humac, Massif du Mitaraka, Layon A; 54°45’09”O, 2°23.57”N; 280 m – 54°45.47”O, 2°24.05”N; 365 m; 23.II.2015 - 10. III.2015; F. Legendre & S. Hugel leg.; night; Planète revisitée Guyane 2015; 2015 GUY SH 552; Molec 2016 LDG 552; MNHN- EO-ENSIF10918; MNHN . • 1♀; Arataye Affl. Approuague , aval du Saut Parare; 12 Jul. 1988; beating during the day, no. 6, Patawa Palm; MNHN-EO-ENSIF10919; MNHN .

DIAGNOSIS. — This species is separated from the other species of Stenoecanthus by the following characters: Fastigium outer margin bent up; LL with a median spot dark brown. Male: stridulatory file with c. 49 teeth. Male genitalia: PsP very sclerotized; anterior portion thin, inclined inwards, almost parallel to anterior margin of pseudepiphallic sclerite; EndSc longer than wide, posterior margin concave in dorsal and ventral views, antero-lateral margins folded ventrally. Female: FWs lateral margin with three spots dark brown in dorsal view; last abdominal tergite posterior margin concave, with latero-posterior regions somewhat elongated and inflated in dorsal and lateral views, with bristles; ovipositor dorsal valves laterally expanded resembling a leaf, involving dorsal region of ventral valves.

DESCRIPTION

General morphology.

Body. Generally slender, medium size, general coloration light brown ( Fig. 30 A-D).

Head. Occiput and vertex with few yellowish bristles; occiput light brown with dark brown band behind eyes; vertex light brown with two median medium brown stripes. Fastigium longer than wide, light brown; antennal socket inner margin bent up in frontal view ( Fig. 30A, E ). Frons smooth, light brown with a dark brown median macula somewhat triangular ( Fig. 30E ). Eyes as long as wide in lateral view, ommatids medium brown; crossed by a dark brown horizontal line ( Fig. 30B, D ). Antennal scape longer than wide, inner margin with whitish bristles, light brown, outer margin dark brown; antennomeres light brown, with medium brown bands of two or three antennomeres. Gena light brown with transversal dark brown band below eyes in frontal and lateral views. Mandibles light brown. Epistomal suture dark yellow; clypeus light brown, upper margin medium to dark brown; labrum light brown ( Fig. 30E ). Maxillary palpi slightly pubescent with whitish bristles, light brown, articles 3-5 almost same-sized; article 5 apex upcurved.

Pronotum. DD wider than long, with some whitish bristles; light brown with two dark brown lateral short stripes on anterior region. DD cephalic margin concave; caudal margin convex wider than cephalic margin. LL light to medium brown with a dark brown median spot; ventro-cephalic angle slightly rounded; ventro-caudal angle rounded in lateral view ( Fig. 30A, C ). FWs not covered by bristles, light brown, translucent; veins light and medium brown ( Fig. 30A, C ). HWs longer than FWs in dorsal and lateral views.

Legs. Legs I and II with whitish bristles. FI and FII light brown, punctuated dark brown.TI and TII light brown, punctuated dark brown. TI with both inner and outer tympana; inner tympanum longer than outer, both oval shape. TI with two ventral apical spurs. TII with three apical spurs: two ventral, one dorsal, internal. FIII and TIII almost same-sized; FIII light brown, punctuated dark brown. TIII light brown, punctuated dark brown ( Fig. 30A, C ). TIII subapical spurs 3/6, with three spines between spurs; three spines above outer subapical spurs, c. 20 spines above inner subapical spurs. TIII apical spurs 3/3, longer on inner side; inner apical spurs: dorsal (iad) slightly longer than median (iam), ventral the smallest (iav) (iad>iam>iav); iad and iam inflated; outer apical spurs: median longest (oam), dorsal slightly shorter (oad), ventral almost same size of dorsal (oav) (oam>oad>oav). TIII apical and subapical spurs and spines medium brown, apex dark brown. Basitarsus dorsal spines 4/2, apical spine the longest; inner and outer apical spur same size, shorter than basitarsus. Basitarsus light brown.

Abdomen. Tergites medium to dark brown with two dark brown median spots on each tergite. Cerci pubescent, longer than TIII, light brown.

Male

Morphology. Metanotum without projections, antero-lateral regions inflated, without bristles ( Fig. 30F ). FWs covering entire abdomen; PCu curved on anterior region; bearing a stridulatory file ventrally with c. 49 stridulatory teeth. Harp crossed by two transverse veins, connected apically and connected to CuPa; CuPb short; mirror divided on the middle by a curved vein; apical field poorly developed, with four columns of cells ( Fig. 30A ). Lateral field with c. 17 parallel veins, perpendicular to dorsal field in lateral view. Supra anal plate posterior margin rounded, dark brown ( Fig. 30G ). Subgenital plate longer than wide, posterior margin straight, pubescent; light brown, with darker median region, bristles whitish ( Fig. 30H ).

Male genitalia ( Figs 31 A-C; 32). Pseudepiphallus: pseudepiphallic sclerite apex straight in lateral view, anterior margin almost straight in dorsal view; MLophi absent. LLophi occupying posterior half of pseudepiphallic sclerite, posterior margin rounded, inner margin with bristles. PsP very sclerotized; anterior portion thin, inclined inwards, almost parallel to anterior margin of pseudepiphallic sclerite in dorsal and ventral views; posterior margin somewhat globular. R longer than pseudepiphallic sclerite, straight in dorsal and ventral views, anterior margin pointed. Ectophallic invagination: EctAp surpassing anterior margin of pseudepiphallic sclerite, curved outwards in ventral view. Arc not complete, straight in dorsal and ventral views; ventral projections of ectophallic invagination shorter than EctAp, inclined outwards. EctF weakly sclerotized, posterior margin rounded. Endophallus: EndSc longer than wide, shorter than EctAp, posterior margin concave in dorsal and ventral views, antero-lateral margins folded ventrally; EndAp short.

Female

Morphology. Size and coloration as in male ( Fig. 30B, D ). FWs covering abdomen; bearing nine longitudinal veins, with small transverse connective veins between them; lateral margin with three dark brown spots in dorsal view. Supra anal plate light brown, median region darker, latero-posterior regions with a dark spot; posterior margin rounded ( Fig. 30I ) Subgenital plate wider than long, posterior margin rounded; medium brown ( Fig. 30H ). Last abdominal tergite posterior margin concave, with latero-posterior regions somewhat elongated and inflated in dorsal and lateral views, with bristles ( Fig. 30J, K ). Ovipositor flattened dorso-ventrally, downcurved; dorsal valves laminar, laterally expanded, resembling a leaf, involving dorsal region of ventral valves, yellow ( Fig. 30M ); ventral valves medium brown; apex lateral margins smooth, posterior tip pointed.

Female genitalia ( Fig. 31 D-E). Copulatory papilla cylindrical, with ventral aperture; posterior margin rounded in dorsal view; anterior margin acuminated in dorsal and ventral views.

Measurements (mm)

Males (n = 2, holotype and paratype). HW, 2.15 ± 0.21 (2-2.3); IOD, 1; PL, 3; PW, 2.3 ± 0.4 (2-2.6); FWL, 14 ± 0.1 (13.9-14.1); FWW, 3.25 ± 0.35 (3-3.5); HWL, 22.55 ± 0.63 (22.1-23); LFIII, 12; WFIII, 1.9 ± 0.1 (1.8-2); LTIII, 11.45 ± 2 (10-12.9); LBtarsIII, 1.5.

Females (n = 2, allotype and paratype). HW, 2.45 ± 0.1 (2.4-2.5); IOD, 1; PL, 3; PW, 2.4 ± 0.14 (2.3-2.5); FWL, 16; FWW, 2.5; HWL, 24.15 ± 1.6 (23-25.3); LFIII, 13.4 ± (12.8-14); WFIII, 1.65 ± 0.2 (1.5-1.8); LTIII, 14 ± 1.7 (12.8- 15.2); LBtarsIII, 1.9 ± 0.1 (1.8-2); OL, 12.6 ± 0.8 (12-13.2).

Figures

FIG. 1. — Living habitus: A, Tafalisca hugeli n. sp., adult male; B, Tafalisca hugeli n. sp., nymph; C, Cylindrogryllus (Apterotrypa) mitarakensis n. sp., adult male; D, Cylindrogryllus (Apterotrypa) guyanensis n. sp., adult male; E, Stenoecanthus planixiphus n. sp., adult female; F, Stenoecanthus planixiphus n. sp., adult male and female, mating. Photos: © Sylvain Hugel.

FIG. 30. — Stenoecanthus planixiphus n. sp., male and female: A, male habitus, dorsal; B, male habitus, lateral; C, female habitus, dorsal; D, female habitus, lateral; E, male head, frontal; F, male metanotum, dorsal; G, male supra anal plate; H, male subgenital plate; I, female supra anal plate; J, female terminalia, lateral; K, female terminalia, lateral; L, female subgenital plate; M, ovipositor, ventral. Abbreviations: Sup., supra anal plate; Sub., subgenital plate; Ovi., ovipositor; Terg., tergite. Scale bars: A-D, 5 mm; M, 2 mm; E-K, 1 mm.

FIG. 31. — Stenoecanthus planixiphus n. sp., male phallic complex: A, dorsal; B, ventral; C, lateral. Female copulatory papilla: D, dorsal; E, ventral; F, lateral. Scale bars: A-C, 1 mm; D-F, 0.5 mm.

FIG. 32. — Stenoecanthus planixiphus n. sp., male phallic complex: A, dorsal; B, ventral; C, lateral. Abbreviations: See Material and methods. Scale bar: 1 mm.