. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Sigmodontine rodents from southeastern Brazil 225. Fig. 18: Thaptomys nigrita (PH 10112 a); skull and molars; GSL, mm; molars, mm; Pico da Bandeira, Parque Nacional de Caparaó, Minas Gerais. as a subgenus of Akodon. Cabrera (1961: 453) followed without comment. Reig (1987: 358), with judgement derived from unrevealed sources declared that "separa- tion of Thaptomys from Akodon s. s. is ; Nothing, he averred, distinguishes the taxon &qu


. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Sigmodontine rodents from southeastern Brazil 225. Fig. 18: Thaptomys nigrita (PH 10112 a); skull and molars; GSL, mm; molars, mm; Pico da Bandeira, Parque Nacional de Caparaó, Minas Gerais. as a subgenus of Akodon. Cabrera (1961: 453) followed without comment. Reig (1987: 358), with judgement derived from unrevealed sources declared that "separa- tion of Thaptomys from Akodon s. s. is ; Nothing, he averred, distinguishes the taxon "beyond the limits of variation with Akodon s. ; The peculiarity of a single pair of prostate glands in Thaptomys nigrita was not appreciated by Reig, and the highly advanced fossorial adaptations of the mouse (table 12) were dismissed as "alleged," and "too incipient to deserve any special taxonomic ; It has since been shown (Hershkovitz 1990b: 6), "that the short tail, long manual claws, heavy skull, ridged parietals, short, thick rostrum with long nasal bones, wide interorbital region, squared braincase, relatively small molars, long powerful proodont incisors projecting well beyond the nasals, and the diploid chromosome number 52, are singly or in any combination definitely non-AkodonV Musser & Carleton (1993: 691) however, retained Thaptomys in the synonymy of Akodon. Thaptomys nigrita Lichtenstein (fig. 18) " Mus nigrita Lichtenstein, 1829 p. 35, fig. 1 (animal). Thomas 1902: 62 — synonyms: subterraneus Hensel 1872, henseliLeche, 1886, fuliginosus Wagner, 1845, orycter Lund, 1841. Holotype. Male, skin only, Zoological Museum, Berlin. Type locality. Vicinity of Rio de Janeiro, Brazil. Distribution. Southeastern Brazil from the State of Bahia south through Minas Gerais, Säo Paulo, Paraná, Santa Catarina, Rio Grande do Sul into eastern Paraguay, and in Argen- tina, the province of Please note that these im


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