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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common Names 
Caaeteboia sp. — PEREIRA-FILHO et al. 2017: 170
Caaeteboia gaeli — FILHO et al. 2023 
DistributionBrazil (Paraíba)

Type locality: Mata do Açude Cafundó, Companhia São João, municipality of Cruz do Espírito Santo, state of Paraíba, Brazil (07°10’57”S, 35°05’33”W).  
TypesHolotype: MZUSP 19559, adult male, collected by Gindomar G. Santana on 1 March 2008 (field number: GGS 784). Right hemipenis prepared and deposited in the Hemipenial Collection of the Museu de Zoologia da Universidade de São Paulo (Fig. 6 in Montingelli et al. 2020).
Paratype: UFPB (= CHUFPB) 24395, an adult female from a forested fragment in the municipality of Pedras de Fogo, state of Paraíba, Brazil (07°25’28”S, 34°57’38.3”W), 27 km southwest from the type locality (Fig. 7), collected by Pedro R. A. Albuquerque in July 2018. 
DiagnosisDiagnosis: Caaeteboia gaeli sp. nov. is diagnosed by a slender and small body; rounded pupil; eight supralabials (fourth and fifth contacting the orbit); nine infralabials (first to fourth contacting chinshields); loreal absent (fused with prefrontals); a preocular single and wide; two postoculars; temporals 2+2/1+2, or 2+1/2+1; dorsals 15/15/15; at least 158 ventrals, 92–106 paired subcaudals; anal plate divided; continuous dark-brown lateral stripe, bordered in black, extending from nasal, to the anterior portion of body, on rows of dorsals three and four, starting to fade after the10–15th ventrals, weakening towards the end of body; posterior to parietals, “V” shaped dark-mark, extending backwards and forming a weak vertebral stripe fading posteriorly; hemipenial lobes almost completely covered with calyces and naked area restricted to the small and poorly marked lobular crotch, on the asulcate side; medial edges of lobes poorly demarcated and bordered with spines; lobular crest poorly developed, bearing small spines on its edge (Fig. 6A, Montingelli et al. 2020).

Coloration: Ground color of body light brown, with dark marks scattered on top of the head and a poorly defined brownish vertebral stripe on the anterior portion of the body that fades posteriorly (Figs. 3, 4A–B, and 5). Well-defined dark-brown lateral stripe, bordering supralabials dorsally and extending posteriorly, on the lateral side of the dorsum, on rows three and four. Ventrally, head and body immaculate whitish-cream, with a small dark spot on each edge of ventrals.

Comparisons: Caaeteboia gaeli differs from C. amarali by the following combination of characters (values of C. amarali between parenthesis; Table 1): 15/15/15 smooth dorsal scales (vs. 17/17/15 or 17/17/17); 158 ventrals (vs. 165–184); 92–106 paired subcaudals (vs. 112–124); well-defined dark lateral stripe (Fig. 4) extending posteriorly along the lateral sides of the body on rows three and four (vs. ill-defined dark ocular stripe, separate or poorly connected to the first of nearly ten dark blotches that occupies fourth, fifth and sixth rows; dark stripe absent on the body); hemipenial lobes (Fig. 6) almost completely covered with calyces and naked area restricted to the small and poorly marked lobular crotch on the asulcate side (vs. lobes covered with calyces on sulcate, asulcate and lateral sides, large naked area on the medial surface of lobes and large lobular crotch); medial edges of lobes poorly delimited and bordered with spines (vs. medial edges of lobes strongly delimited and bordered with spines); lobular crest poorly developed bearing small spines on its edge (vs. lobular crest strongly developed bearing enlarged spines on its edge); shorter proximal head of the quadrate and longer supratemporal with a free-ending posterior extremity projecting beyond the braincase (vs. wider proximal head of the quadrate and shorter supratemporal that does not project posteriorly in a free-ending extremity) (Fig. 7); contact between the maxilla and ectopterygoid reaching the level of the post-frontal (sensu Zaher and Scanferla, 2012) in lateral view (vs. maxilla-ectopterygoid contact does not reach the level of the postfrontal); longer angular, three times longer than high (vs. angular twice longer than high); pituitary vein foramen lying between the sphenoid and parietal (vs. pituitary vein clasped by the parietal, sphenoid and prootic). 
EtymologyThe specific name honours Gael Hingst Zaher. GGM, FEB, GAPF, GGS, FGRF and FGG dedicated this species to the beloved son of the senior author, who sadly passed prematurely in March, 2020. 
  • Filho, G.A.P. et al. 2023. Composition, Species Richness, and Conservation of the Reptiles of the Highly Threatened Northern Brazilian Atlantic Forest. In: Pereira Filho, G.A., França, F.G.R., Alves, R.R.N., Vasconcellos, A. (eds) Animal Biodiversity and Conservation in Brazil's Northern Atlantic Forest. Springer, Cham - get paper here
  • Freitas, Marco A. de; Marcos J.M. Dubeux, Márcio F. Chaves, Bruno F. Fiorillo, Gentil A.P. Filho, Washington L.S. Vieira, and Geraldo J.B. de Moura 2023. Herpetofauna in three highland Atlantic Forest remnants in northeastern Brazil. Herpetology Notes 16: 377-390
  • Montingelli, Giovanna Gondim; Barbo, Fausto Erritto; Pereira Filho, Gentil Alves; Santana, Gindomar Gomes; França, Frederico Gustavo Rodrigues; Grazziotin, Felipe Gobbi; Zaher, Hussam 2020. A second new species for the rare dipsadid genus Caaeteboia Zaher et al., 2009 (Serpentes: Dipsadidae) from the Atlantic Forest of northeastern Brazil Cuad. herp. 34 (2): 219-230 - get paper here
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