Zebragryllus guianensis 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 : 10-11

publication ID	https://doi.org/ 10.11646/zootaxa.3768.1.1
publication LSID	lsid:zoobank.org:pub:52F3CC4B-EE94-4AF5-9A49-BAF0274E1EEA
DOI	https://doi.org/10.5281/zenodo.6133655
persistent identifier	https://treatment.plazi.org/id/3214D42B-2C28-FFC2-FF47-8BF5FADEF965
treatment provided by	Plazi
scientific name	Zebragryllus guianensis Desutter-Grandcolas
status	sp. nov.

Treatment

Zebragryllus guianensis Desutter-Grandcolas , n. sp.

( Figs 2 View FIGURE 2 B, G, 3D, 4C, D, 5B, 6F–J, 8B)

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:464246

Type locality. French Guiana, Arataye, Affl. Approuagues, 8 km NE pied saut Parare, Réserve des Nouragues.

Type material. Holotype: French Guiana, Arataye, Affl. Approuagues, 8 km NE pied saut Parare, 1 male, 15.v.1988, jour, L. Desutter (MNHN-EO-ENSIF3173). Allotype: same data as holotype, 1 female, 14.v.1988 (MNHN-EO-ENSIF3174). Paratypes, 2 males: Same data as the holotype, 1 male, 15.v.1988, jour (recorded); 1 male, 18.v.1988, jour (MNHN-EO-ENSIF3114, 3175).

Distribution. Eastern Amazonia, French Guiana, Arataye.

Etymology. Species named after its distribution.

Diagnosis. Small, black and white species; base of antennae (including scape) white; a white ring at cerci base; white band along outer margin of FIII narrow ( Fig. 3 View FIGURE 3 D). Male. FWs not covering the whole abdomen; harp with two to four transverse veins; mirror still distinct even though subdivided into many small cells. Male genitalia. Pseudepiphallic sclerite deeply emarginate ( Fig. 4 View FIGURE 4 C); median lophi with a long and thin dorsal process, rounded ventrally ( Fig. 4 View FIGURE 4 D); lateral lophi short and thick ( Fig. 4 View FIGURE 4 D); acute apex of ectophallic fold pointing between pseudepiphallic median lophi; ectophallic apodemes long; apodeme on dorsal cavity slightly longer than ectophallic apodemes. Female. Apterous; posterior margin of metanotum with a white semi circular band, covering part of tergite 1 anterior margin; abdomen black with tergites 4 to 6 white in their anterior two/third, except on a short medio dorsal line, black ( Fig. 5 View FIGURE 5 B). Subgenital plate light brown; last sternite whitish distally.

Description. Very small species for the genus, with slightly protruding eyes. Head wider than pronotum. Pronotum more narrow distally. TIII with 4–5 (female) and 5 (males) inner, and 5 (female) and 5–6 (males, mean 5.5) outer subapical spurs, the 5th inner and the 6th outer sometimes much smaller when present. Basitarsomeres III with 3 inner, and 5 outer dorsal spines in addition to apical spines, in both males and female; spines smaller than in other species.

Coloration. Head black brown; lower part of the face above epistemal suture black brown or dark reddish brown; maxillary palpi dark brown, joint 4 slightly lighter dorso-basally. Antennae with a white basal ring (scape + 7–8 antennomeres in males (mean 7.5); scape very light brown on margins, first antennomere very light brown + 7 white antennomeres in female), followed by a brown ring (26–31 brown antennomeres in males (mean 28.8), 27– 31 brown antennomeres in female), a second white ring (11–15 white antennomeres in males (mean 13.3), 13–15 white antennomeres in female), then dark brown (antennae broken at that level in all observed specimens). TI, TII light brown. FI, FII dark brown with a large white dorsal patch covering part of inner and outer sides. TIII and basitarsomeres III light brown with lighter spurs. FIII ( Fig. 4 View FIGURE 4 A) dark brown, lower margin white, this longitudinal band narrow on outer side, wider on inner side, and connected to a transverse wide band at about three fourth of FIII length; an additional white oblique band close to FIII base. Cerci black brown with a white basal ring.

Male. FWs covering the base of cerci, but not the subgenital plate. Stridulatory apparatus ( Fig. 2 View FIGURE 2 B): harp with two to four veins (sometimes incomplete), mirror divided into many cells, stridulatory file with about 93 teeth (n=1). Subgenital plate long and truncate apically ( Fig. 2 View FIGURE 2 G).

Male genitalia. Pseudepiphallic sclerite short and not very wide; median lophi acute and “foliaceous” dorsally ( Fig. 4 View FIGURE 4 C), rounded ventrally ( Fig. 4 View FIGURE 4 D); lateral lophi short and wide. Pseudepiphallic parameres going beyond median lophi. Pseudepiphallic apodemes very short. Ectophallic fold narrow and very long, visible dorsally between median lophi ( Fig. 4 View FIGURE 4 C). Ectophallic apodemes and apodeme on top of dorsal cavity all very long and about equal in size.

Female. Apterous. Coloration pattern ( Fig. 5 View FIGURE 5 B): Mesonotum (hardly visible) and distal margin of metanotum whitish, the white pattern of metanotum making a wide half-circular band, prolonged mediodorsally on tergite 1; tergites 4, 5 and 6 (and to a less extent tergite 3) with a pair of white bands, separated along mid dorsum by a narrow black area; these bands located along tergite anterior margin dorsally, more lateral at tergite mid length, and reaching the tergite posterior limit laterally; white band on tergite 4 brightest and widest laterally. Subgenital plate wider than long, truncate distally, distal margin hardly concave ( Fig. 6 View FIGURE 6 F, G). Sternite before subgenital plate light brown, with a whitish, crescent-shaped spot along distal margin. Ovipositor very short, much shorter than TIII.

Female genitalia. Copulatory papilla asymmetrical, wide and well sclerotized distally, much narrow and less sclerotized anteriorly ( Fig. 6 View FIGURE 6 H–J).

Measurements (in mm).

Lpron wpron LFIII wFIII LTIII Lovip Allotype 1.9 2.3 6.7 2.4 4.5 3.4 Calling song. One male has been recorded in the field (MNHN-EO-ENSIF3114; recording temperature not documented). This species produces series of echemes ( Fig. 8 View FIGURE 8 B) where the echeme duration is 0.24±0.03 ms, echeme period is 1.22±0.4 ms and the duty cycle is 19%. Each echeme contains 8±1 syllables where duration of a syllable is 0.02±0.002 ms, period is 0.03±0.003 ms and the duty cycle is 62%; the dominant frequency is 3 kHz.