Pale Collared Scarlet Snake

distribution

Distribution. Endemic to Brazil (Plt. 330 A). Restricted to western Amazonia (Plt. 330 A), at low elevations (Plt. 330 B). Observed in the field in primary and secondary forest, and riparian areas (Martins and Oliveira, 1998; Zaher et al., 2008 b).

Atlas of Brazilian Snakes: Verified Point-Locality Maps to Mitigate the Wallacean Shortfall in a Megadiverse Snake Fauna

materials_examined

Type locality. Fazenda Porto Alegre, Manaus, state of Amazonas, Brazil.

Atlas of Brazilian Snakes: Verified Point-Locality Maps to Mitigate the Wallacean Shortfall in a Megadiverse Snake Fauna

description

Description of the holotype. The specimen is a large male with 1020 mm TTL, 262 mm tail length (25 % of TTL); head length 23.5 mm (2.3 % of TTL); head width 15.1 mm at broadest point; snout length 6.1 mm (25.9 % of TTL). Head slightly distinct from neck; body robust, slightly wider than high. Dorsal scales smooth, in 17 - 17 - 17 rows, without apical pits. There are 198 ventrals, an undivided anal scale, and 91 unpaired subcaudals. Maxillary teeth 14, the last one deeply grooved and separated from the others by a large diastema. Rostral 1.46 times wider than high, and visible from above. Paired internasals 1.2 times wider than long. Paired prefrontals 1.3 times wider than long, in contact with each other and with internasal, posterior nasal, loreal, preocular, supraocular, and frontal. Frontal pentagonal, 1.07 times longer than wide. Supraocular 1.4 times longer than wide. Parietals 1.65 times longer than wide. Nasal 1.64 times longer than high, in contact with supralabials 1 – 2 and divided above and below the naris. Loreal 1.6 times longer than high. Preocular 1.4 times higher than long. Two small postoculars, the upper 1.3 times higher than the lower. Two anterior and two poster

A new, brightly colored species of Pseudoboa Schneider, 1801 from the Amazon Basin (Serpentes, Xenodontinae)

diagnosis

Diagnosis. A Pseudoboa that differs from all other species of the genus by the retention of a large pale collar in large individuals, and by the absence of apical pits on dorsal scales. Further differs from Pseudoboa haasi, P. n i g r a, and P. neuwiedii in having 17 instead of 19 dorsal scale rows, and from P. nigra and P. n e u w i e - dii in the presence of seven instead of eight supralabial scales.

A new, brightly colored species of Pseudoboa Schneider, 1801 from the Amazon Basin (Serpentes, Xenodontinae)