White Collared Blackhead

distribution

Distribution. Endemic to Brazil (Plt. 228 A), restricted to the central portion of the Cerrado (Plt. 228 A) at intermediate to high elevations (Plt. 228 B). Previous maps and taxonomy in Nogueira et al. (2012). Observed in the field in open interfluvial savannas (Nogueira et al., 2012).

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

materials_examined

Type locality. Parque Zoológico de Brasília, Brasília, Distrito Federal, Brazil.

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

conservation

Conservation status It is known from 37 records representing 17 localities (unique georeferenced coordinates) (Fig. 7 A). Its extent of occurrence was calculated to be 62 434 517 km ² and its area of occupancy was calculated to be 64 000 km ² (B 2). The species occurs in less than 10 locations (a). It is under strong pressure by the continued decline in habitat quality by extensive and ongoing habitat loss and fragmentation (b (iii )) due to expansion of agriculture, pasturing, mining, and fire frequency (Fig. 7 BC). Additionally, only a small part of the distribution of the species is located in just one Protected Area (Parque Nacional de Brasília, Fig. 7 D). We suggest the species is under threat and qualifies to be listed as Vulnerable (VU ab (iii )).

Unveiling an enigma from the Cerrado: taxonomic revision of two sympatric species of Apostolepis Cope, 1862 (Dipsadidae: Xenodontinae: Elapomorphini) from central Brazil

description

Description Head slightly distinct from body, twice as long as wide, triangular in dorsal view, arched in lateral view (Fig. 3); cervical constriction absent; snout conical, tapered in dorsal view, projected in lateral view; nasal undivided, longer than wider, in contact with preocular (rarely separated), rostral, first two supralabials and prefrontals; prefrontals paired, longer than wider, in contact with rostral, nasal, supraocular, and frontal; supraocular longer than wider; frontal hexagonal, longer than wider; internasals absent (rarely present); loreal absent (rarely present); preocular present, longer than high; eye small; interorbital distance as long as parietal distance; postocular single, as long as high; temporals absent; occipital present, in contact with parietal and sixth supralabial; supralabials six (rarely four, five, seven), first in contact with nasal and rostral, 2 – 3 in contact with orbit, 3 – 4 in contact with postocular, 5 – 6 in contact with parietal; infralabials six or seven (rarely eight), first pair in contact with symphisal and anterior chinshields, second, third, and fourth pairs in contact with anterior chinshields, third, fourth, fifth, sixth, and

Unveiling an enigma from the Cerrado: taxonomic revision of two sympatric species of Apostolepis Cope, 1862 (Dipsadidae: Xenodontinae: Elapomorphini) from central Brazil