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Apostolepis roncadori LEMA, 2016

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common Names 
SynonymApostolepis roncadori LEMA 2016
Apostolepis roncadori — NOGUEIRA et al. 2019 
DistributionBrazil (Mato Grosso)

Type locality: Roncador Hill, Mato Grosso, Brasil  
TypesHolotype: BMNH 1972.429 
DiagnosisDiagnosis: Similar to Apostolepis christinei Lema 2002, differing mainly by having a head with same diameter of neck (vs. lower); absence of dorsal stripes, presenting serial dots very spaced among them (vs. five dark stripes); snout blackish (vs. light); supralabial blotch long, from rostral to last supralabial (vs. small, on two supralabials); lower side of rostral plane (vs. reentrant); tail blotch longer (vs. short).

Morphology: Stocky body, from head to tail tip. Head few elongate, few wider than neck; snout strongly projected, pointed and flat. Eye large, with vertical diameter equal to the distance of it to oral margin (may be due to be young), in relation to A. christinei. Tail relatively short, more than 15 times in total length; with tip high and rounded.

Measurements: Length of head, trunk, tail, and total: 8, 228, 16, and 252, respectively; tail by snout-vent length, 0.034. Head height, 2.5, in parietals; 1, in nostrils; width 3.1 parietals), and 1.8 (nostrils). Orbit diameter, 0.45; distance orbit to oral margin, 0.4. Neck, height and width: 2.7, 2.9, respectively. Body width in half trunk and cloacal region, 3.5, 2.4 respectively. Tail widths: 2.4 )(basis), 2.4 (half), and 1.3 (in subcaudal scale). Length of last subcaudal and terminal, 0.5, and 1.04, respectively. Largest head shields: rostral portion visible from above, 1.57; suture between prefrontals, 0.45; each prefrontal length and width, 1.34 and 1.07, respectively; frontal length and width, 2.06, 1.7, respectively; each parietal length and width, 2.5, 1.41, respectively; suture between parietals, 1.67.

Pholidosis: Rostral large, flattened, pointed and projecting two beyond jaws; lower projecting side, plane. Prefrontals small. Frontal large, hexagonal. Supraoculars narrow and small. Parietals long, and divergent each other. Nasal long and low, with nostril in anterior part. Preocular long and low, larger than postocular. Postocular vertical rectangle. Temporal absent. Supralabials five, seccond and third entering the orbit, the size increased to rear; the first long and rectangular (not triangular); from second to fourth are isodiametrical; fifth is the largest, with posterior margin curved. Mental triangular and small, isolated of the anterior chin-shields by first pair of infralabials. Infralabials six, the anterior three contacting anterior chin-shields, and the anterior pair contacting each other, rear of mental; the infralabials increasing to rear, being the first narrow, the second longer, the third is the largest, the fourth is large, and the two last are very small and long Each gular with parallelogram shape, and disposed in six row by each side, resting six in the median line. Five preventrals. Ventrals in 239. Cloacal single, as anomaly. Subcaudals 24 pairs; rate between subcaudals and ventrals, 0.1. Dorsal scales in six rows in the tail contacting the terminal, which is high and few conic, with dorsal profile oblique.

Coloration: (In preservative, ethylic alcohol). Pileus blackish brown (may be black in life), with some small and irregular light brown blotches on rostral. Black nuchal collar long as 2-3 rows of dorsal scales; reaching to sides until oral rictus, only, do not reaching the gular region. Supralabial blotch low and long, from anterior margin of the fifth to rostral. Lower head side immaculate. No dorsal stripes, only few spaced dots on vertebral scales row. Tail blotch extending by nine dorsal scales, reducing to seven rows at lower sides, and covering 4/3 subcaudals (right/left), which are partially dotted. Terminal white, except proximal up. 
  • Lema, T. de 2016. DESCRIPTION OF NEW SPECIES OF Apostolepis (SERPENTES: DIPSADIDAE: XENODONTINAE: ELAPOMORPHINI) FROM SERRA DO RONCADOR, CENTRAL BRAZIL. Caderno de Pesquisa, série Biologia 28 (1): 1-12 - get paper here
  • Nogueira, Cristiano C.; Antonio J.S. Argôlo, Vanesa Arzamendia, Josué A. Azevedo,<br />Fausto E. Barbo, Renato S. Bérnils, Bruna E. Bolochio, Marcio Borges-Martins,<br />Marcela Brasil-Godinho, Henrique Braz0, Marcus A. Buononato, Diego F. Cisnero 2019. Atlas of Brazilian snakes: verified point-locality maps to mitigate the Wallacean shortfall in a megadiverse snake fauna. South American J. Herp. 14 (Special Issue 1):1-274 - get paper here
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