Zebragryllus intermedius Desutter-Grandcolas

Desutter-Grandcolas, Laure, Cadena-Castañeda, Oscar J., Jaiswara, Ranjana & Anso, Jeremy, 2014, Zebragryllus Desutter-Grandcolas & Cadena-Casteñada, n. gen. a new Gryllinae genus from Eastern and Western Amazonia, South America (Orthoptera, Grylloidea, Gryllidae), Zootaxa 3768 (1), pp. 1-22 : 19-20

Zebragryllus intermedius Desutter-Grandcolas , n. sp.

( Figs 2 K, 3G, 4I, J, 5D, 7E–I, 8D)

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:464247

Type locality. Peru, Loreto, Iquitos.

Type material. Holotype: Peru, Loreto, Iquitos, Route de Nauta , km 9, 1 male, 29.viii.1985, jour, L. Desutter (MNHN-EO-ENSIF3187). Allotype: same data as the holotype, 1 female, jour (MNHN-EO-ENSIF3188). Paratypes. 2 males, 2 females: Same data as the holotype, 1 male, 1 female (MNHN-EO-ENSIF3189, 3190); same locality as the holotype, 1 female, 30.viii.1985, jour, L. Desutter (MNHN-EO-ENSIF3191). Peru, Route de Nauta , km 5, 1 male, 30.viii.1985, jour, L. Desutter (MNHN-EO-ENSIF3281).

Additional specimens examined. Same data as the holotype, 1 juvenile female, 27.viii.1985, jour, L. Desutter. MNHN.

Distribution. Western Amazonia, Peru (dept. Loreto).

Etymology. Species named after its pattern of coloration, intermediate between dark species and ”zebra” species.

Diagnosis. Species very close to Z. fuscus Desutter-Grandcolas , n. sp., from which it can be separated by its bigger size and its white pattern of FIII outer side ( Fig. 3 G). It can be separated from other ”zebra” species by the lack of transverse white band on FIII, and white tergite in females ( Fig. 5 D). Male genitalia only slightly different from Z. fuscus Desutter-Grandcolas , n. sp. Female copulatory papilla short, its distal margin distinctly concave and distal angles acute ( Fig. 7 E, F).

Description. In addition to the characters of the genus. Base of antennae (30–36 antennomeres, mean 33 in males and females) and the scape dark brown, before a short white white ring (14–16 antennomeres). Basitarsomeres III with 4–5 inner, and 5–7 in males (mean 6.2) and 5–6 in females (mean 5.8) outer dorsal spines, in addition to apical ones. Head and body coloration shining black; maxillary palpi black brown; cerci black, somewhat lighter at base, but without a distinct clear basal ring; FI and FII black, with sometimes an indistinct lighter area on outer side; TI and TII somewhat reddish; FIII with a whitish band along outer margin, and an oblique one near outer basis; TIII dark reddish brown, with lighter spurs.

Male: FW not covering the tip of subgenital plate; mirror as in Z. fuscus Desutter-Grandcolas n. sp.; stridulatory file with about 106 teeth (n=1). Subgenital plate as on Fig. 2 K.

Male genitalia: Very close to that of Z. fuscus Desutter-Grandcolas , n. sp. (compare Fig. 4 G, H and 3I, J), but distal margin of pseudepiphallic parameres more straight, and median lophi slightly longer and less curved dorsally.

Female: Apterous. Abdomen shining black without white pattern ( Fig. 5 D). Subgenital plate wider than long, deeply concave distally; with acute and protruding lateral angles ( Fig. 7 E, F).

Female genitalia. Copulatory papilla short, subquadrangular, and somewhat thick; apex slightly concave ( Fig. 7 G–I).

Measurements (in mm).

Calling song. One male has been recorded in the field at 27°C (MNHN-EO-ENSIF3187). The calling song ( Fig. 8 D) is comprised of series of short echemes. Echeme duration is 0.05 ms, echeme period is 0.12±0.01 ms and duty cycle is 41%. Each echeme is composed of 3 syllables each with the duration of 0.01 ms, period 0.02 and the duty cycle is 50%; the dominant frequency of the calling song is 6.1 kHz.

Figures

FIGURE 2. Zebragryllus Desutter-Grandcolas and Cadena-Castañeda, n. gen.: Z. wittoto Desutter-Grandcolas and Cadena- Castañeda, n. sp., maxillary palpus (A), male subgenital plate (F); Z. guianensis Desutter-Grandcolas, n. sp., male FW (B) and subgenital plate (G); Z. nouragui Desutter-Grandcolas, n. sp. male FW (C) and subgenital plate (H), idem, one male from Arataye (I); Z. fuscus Desutter-Grandcolas, n. sp., male FW (D) and subgenital plate (J); Z. intermedius Desutter-Grandcolas, n. sp., male subgenital plate (K); Z. nauta Desutter-Grandcolas, n. sp., male FW (E) and subgenital plate (L). Symbol: Arrow (B – E), anterior angle of FW mirror. Scales 1 mm.

FIGURE 3. Zebragryllus Desutter-Grandcolas and Cadena-Castañeda, n. gen. A – C, Z. wittoto Desutter-Grandcolas and Cadena-Castañeda, n. sp., male genitalia, dorsal (A), ventral (B), lateral (C). D – H, FIII patterns of coloration, lateral, in Z. guianensis Desutter-Grandcolas, n. sp. (D), Z. nouragui Desutter-Grandcolas, n. sp. (E), Z. fuscus Desutter-Grandcolas, n. sp. (F), Z. intermedius Desutter-Grandcolas, n. sp. (G), Z. nauta Desutter-Grandcolas, n. sp. (H). Scale D – H, 0.5 mm. Abbreviations, see Material & Method.

FIGURE 4. Zebragryllus Desutter-Grandcolas and Cadena-Castañeda, n. gen.: Male genitalia, apical sclerites, dorsal and lateral views, in Z. wittoto Desutter-Grandcolas and Cadena-Castañeda, n. sp. (A, B), Z. guianensis Desutter-Grandcolas, n. sp. (C, D), Z. nouragui Desutter-Grandcolas, n. sp. (E, F), Z. fuscus Desutter-Grandcolas, n. sp. (G, H), Z. intermedius Desutter- Grandcolas, n. sp. (I, J) and Z. nauta Desutter-Grandcolas, n. sp. (K, L). Abbreviations, see Material & Method. Scale 0.5 mm.

FIGURE 5. Zebragryllus Desutter-Grandcolas and Cadena-Castañeda, n. gen., female abdomen coloration and FWs, in Z. wittoto Desutter-Grandcolas and Cadena-Castañeda, n. sp. (A), Z. guianensis Desutter-Grandcolas, n. sp. (B), Z. nouragui Desutter-Grandcolas, n. sp. (C), Z. intermedius Desutter-Grandcolas, n. sp. (D); Z. nauta Desutter-Grandcolas, n. sp. (E, F). Scale 2 mm (A – E). Abbreviations: See Material and Methods.

FIGURE 7. Zebragryllus Desutter-Grandcolas and Cadena-Castañeda, n. gen.: Female subgenital plate (ventral, lateral) and copulatory papilla (dorsal, ventral, lateral) in: Zebragryllus sp. affinis fuscus Desutter-Grandcolas, n. sp. (A – D), Z. intermedius Desutter-Grandcolas, n. sp. (E – I); Z. nauta Desutter-Grandcolas, n. sp. (J – N). Scales 1 mm.

FIGURE 8. Zebragryllus Desutter-Grandcolas and Cadena-Castañeda, n. gen., calling song oscillogram and frequency spectrum in: Z. wittoto Desutter-Grandcolas and Cadena-Castañeda, n. sp. (A), Z. guianensis Desutter-Grandcolas, n. sp. (B), Z. nouragui Desutter-Grandcolas, n. sp. (C), Z. intermedius Desutter-Grandcolas, n. sp. (D). Scale 1 sec.