Zebragryllus sp. 2
publication ID |
https://doi.org/ 10.5852/ejt.2024.932.2511 |
publication LSID |
lsid:zoobank.org:pub:2597B29F-DF1C-44E0-92AC-7252E6C72E98 |
DOI |
https://doi.org/10.5281/zenodo.11069370 |
persistent identifier |
https://treatment.plazi.org/id/9D21FC4B-5A51-B37D-4387-27A4FECB96BF |
treatment provided by |
Plazi |
scientific name |
Zebragryllus sp. 2 |
status |
|
Diagnosis
This female is very similar to that of Z. aphonus Tavares, Oya & Cadena-Castañeda sp. nov. in the body shape ( Fig. 12A–B View Fig ). Still, it is quickly differentiated in the legs darker chromatic pattern ( Figs 12A– B View Fig , 13E–H View Fig ). This species does not have the genus characteristic ‘zebra’ pattern on the hind legs or abdomen either ( Figs 12A–B View Fig , 13E–H View Fig ). Other differences easily noted are the longer tegmina ( Fig. 12A– D View Fig ), the large tympana on the outer faces of the fore tibia ( Fig. 13E View Fig , in detail), and the tiny tympana on the inner face ( Fig. 13F View Fig , in detail). The fore and hind (mid legs lost) legs have no whitish areas ( Fig. 13E–F View Fig ). The maxillary palpi are similar to the species described above but differ by the slightly concave fifth segment’s dorsal surface and the slightly longer truncated-medio-distal portion ( Fig. 13D View Fig ). The abdominal tergites are dark brown, with no whitish areas ( Fig. 12A–B View Fig ). The supra-anal plate is subtriangular, with a distal margin rounded, somewhat longer and wider than in Z. aphonus Tavares, Oya & Cadena-Castañeda sp. nov. ( Fig. 12E View Fig ). The subgenital plate is similar to that of the female from Cayenne in Desutter-Grandcolas et al. (2014) (see Desutter-Grandcolas et al. 2014, Fig. 6Q–R View Fig ), with the distal margin convex in lateral view and concave in ventral view ( Fig. 12F–G View Fig ). The ovipositor is also similar to that of Z. aphonus Tavares, Oya & Cadena-Castañeda sp. nov. but darker ( Fig. 12H–I View Fig ), and almost straight, with a triangular apex bearing scale-like texture on the dorsal surface ( Fig. 12J–K View Fig ). The dorsal valves dorsally sulcated ( Fig. 12H–I View Fig ). The copulatory papilla is also similar to the female from Cayenne in Desutter-Grandcolas et al. (2014) (see Desutter-Grandcolas et al. 2014: Fig. b’–d’) but is more cylindrical and not dorsoventrally flat, like in most species of the genus ( Fig. 13A–C View Fig ).
Material examined
BRAZIL • 1 ♀; Tocantins, Araguatins, Fazenda Estiva ; 7°55′31.7″ S, 49°24′11.5″ W; 27 Mar. 2022; pitfall; MPEG. HEX 05050476 View Materials GoogleMaps .
Description
MEASUREMENTS (mm). ♀. TL: 9.5; LP: 1.5; WP: 2.7; Tg: 2.3; HF: 6.5; HT: 4.8; Ov: 6.5.
New records
This is the first time that Zebragyllus has been recorded in Brazil. Two new species are being added to the genus, and two known species are recorded: Z. guianensis ( Figs 14A–H View Fig , 16A View Fig ) and Z. nouragui ( Figs 15A–H View Fig , 16A View Fig ). These two species were only known from their type locality, in French Guiana, where they live in sympatry, and here we extend their distribution ( Fig. 16A View Fig ). Five males and five females of Z. guianensis were collected in the Floresta Nacional de Caxiuanã, municipality of Melgaço, Pará State. Two males, two adult females, and one juvenil specimens of Z. nouragui were collected in Juruti, Pará State. It is plausible that these species occur in Brazil as these two localities are in Northern Pará State, near the boundary between Brazil and French Guiana, but on the other side of the great Amazon River. Floresta Nacional de Caxiuanã is about 630 km south of the Réserve Naturelle Nationale des Nourages (type locality), and Juruti is about 770 km southwest ( Fig. 16A View Fig ). The other species of Zebragryllus are only recorded in Peru and Colombia. So we expect these known species and new ones to also occur in Brazil as their distribution is unexplored.
The males of Z. nouragui studied here have a different chromatic pattern of the hind femora, a variation of the populations described by Desutter-Grandcolas et al. (2014). The paired whitish oblique bands described for the species, like those seen in the female hind femora ( Fig. 15C View Fig ), are absent, and only the ventral whitish band is displayed ( Fig. 15A View Fig ).
Species of Zebragryllus may occur in very low populations since just a few specimens were collected, even in considerable collection efforts, like in Floresta Nacional de Caxiuanã. This site was monitored for two years, with monthly armed pitfall traps in a 2-acre area. The area was divided into several parcels of 1 m ², each with a pitfall trap installed in the center. Even so, only ten specimens of Z. guianensis were captured.
MPEG |
Museu Paraense Emilio Goeldi |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
|
Phylum |
|
Class |
|
Order |
|
SubOrder |
Ensifera |
Family |
|
SubFamily |
Gryllinae |
Tribe |
Gryllini |
SubTribe |
Anurogryllina |
Genus |