Rehnidium Grant, 1956

Silva, Daniela Santos Martins, Cadena-Castañeda, Oscar J. & Pereira, Marcelo Ribeiro, 2021, Batrachideinae (Orthoptera: Caelifera: Tetrigidae): an overview of the most diverse tetrigids of the Neotropical region, Zootaxa 4946 (1), pp. 1-84 : 36

10. Genus Rehnidium Grant, 1956

Rehnidium , as the most part of batrachideines, is a genus with wide distribution in South America ( Fig. 39 ) but poorly understood and few specimens known beyond the type’s species. After review of the Scaria (Cadena-Castañeda et al., 2019), the genus Rehnidium currently has four species: Rehnidium mendosum Grant, 1956 (from Peru, Monson Valley, Tingo Maria) ( Fig. 28 ); Rehnidium necopinum Grant, 1956 (from Peru, Departamento del Cusco, Marcapata) ( Figs. 29 , 30 ); Rehnidium omnivagum Grant, 1956 (from Brazil, Mato Grosso, Santa Rosa de Descalvados) ( Figs. 31 , 32 ) and Rehnidium perexiguum Grant, 1956 ( Ecuador, Tungurahua, Baños) ( Fig. 33 ) ( Grant, 1956, 1962; Cigliano et al., 2021). Rehnidium is characterized by follow: protrusive frontal costa; antennae with 21 segments; wings reduced, apparently absent; anterior margin of the pronotum (lateral and dorsal view) hook-like (median carina sharply cristate); presence of lateral darkish perpendicular band from eyes to disc pronotal region and only brachpronotal specimens ( Grant, 1956, 1962).

Figures

FIGURE 28. Rehnidium mendosum Grant, 1956 holotype (A) left lateral view, (B) frontal view and labels. Scale bar = 1 mm. Photo of type: California Academy of Sciences in San Francisco, Rachel Diaz-Bastin.

FIGURE 29. Rehnidium necopinum Grant, 1956 holotype (A) left lateral view, (B) dorsal view, (C) frontal view and (D) labels. Scale bar = 5 mm. Photo of type: Academy of Natural Sciences of Drexel University, Philadelphia/Daniela Silva and Marcelo Pereira.

FIGURE 30. Rehnidium necopinum Grant, 1956 allotype (A) left lateral view, (B) dorsal view, (C) frontal view and (D) labels. Scale bar = 5 mm. Photo of type: Academy of Natural Sciences of Drexel University, Philadelphia/Daniela Silva and Marcelo Pereira.

FIGURE 31. Rehnidium omnivagum Grant, 1956 holotype (A) left lateral view, (B) dorsal view, (C) frontal view and (D) labels. Scale bar = 5 mm. Photo of type: Academy of Natural Sciences of Drexel University, Philadelphia/Daniela Silva and Marcelo Pereira.

FIGURE 32. Rehnidium omnivagum Grant, 1956 allotype (A) left lateral view, (B) dorsal view, (C) frontal view and (D) labels. Scale bar = 5 mm. Photo of type: Academy of Natural Sciences of Drexel University, Philadelphia/Daniela Silva and Marcelo Pereira.

FIGURE 33. Rehnidium perexiguum Grant, 1956 holotype (A) left lateral view, (B) dorsal view, (C) frontal view and (D) labels. Scale bar = 5 mm. Photo of type: Academy of Natural Sciences of Drexel University, Philadelphia/Daniela Silva and Marcelo Pereira.

FIGURE 39. Map of approximated occurrence of the genus Rehnidium Grant, 1956 and some Tettigidea Scudder, 1862 species.