Eutrachelophis papilio ZAHER & PRUDENTE, 2019
Can you confirm these amateur observations of Eutrachelophis papilio?
|Higher Taxa||Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Synonym||Eutrachelophis papilio ZAHER & PRUDENTE 2019: 9|
Taeniophallus occipitalis – AVILA-PIRES et al. 2009
Eutrachelophis undescribed species – MYERS & MCDOWELL 2014
Eutrachelophis papilio — NOGUEIRA et al. 2019
Type locality: Fazenda Scheffer (8°20′S, 65°43′W), Ituxi River, Municipality of Labrea, state of Amazonas, Brazil
|Types||Holotype. MPEG 25471, collected by Teresa Cristina Sauer de Avila-Pires on February 14, 1997 (fig. 6 in ZAHER & PRUDENTE 2019).|
Paratypes. MPEG 18250, from Km 2 of BR 3041 (9°45′S, 67°39′W), Municipality of Rio Branco, state of Acre, Brazil, collected by Marinus Hoogmoed and Teresa Cristina Sauer Avila-Pires on January 1, 1990. MPEG 19950, Municipality of Careiro da Varzea (3°13′ S, 59°49′ W), state of Amazonas, Brazil, collected by Shawn S. Sartorius on December 22, 1998. MPEG 23862, Municipality of Coari (4°53′ S, 65°21′ W), state of Amazonas, Brazil, collected by Gleomar Maschio and Alessandra Travasso on November 19, 2009. MZUSP 10530, Urucu River (Locality roughly at 05°S, 65°W), state of Amazonas, Brazil, collector and date unknown.
|Diagnosis||Diagnosis. Eutrachelophis papilio is distinguished from all other species by the following combination of characters: 15-15-15 number of dorsal scale rows; three gular scale rows, wider than long; 8 supralabials, 2-3 contacting loreal and 3-5 in orbit; 9 infralabials, 1–5 contacting anterior chinshields and 5-6 posterior chinshields; 139-145 ventrals; 68-76 subcaudals; conspicuous white butterfly-shaped ocellus on the nape; hemipenis slightly bilobed with apical disks; and 22-25 maxillary teeth subequal in size and recurved, followed by diastema and two ungrooved fangs.|
Comparisons. Eutrachelophis papilio differs from Eu. bassleri by having a single laterally expanded, butterfly-shaped and black-rimmed white ocellus on the nape (vs. a pair of distinct round-shaped, black-rimmed white ocelli on the neck in Eu. bassleri), a higher number of ventrals (139-145 vs. 128-139 in Eu. bassleri), and a longer hemipenial lobe that tapers distally (rounded distally in Eu. bassleri).
|Etymology||The specific epithet is derived from the Latin word “papilio”, gender masculine, and noun in apposition, in reference to the butterfly-shaped white ocellus on the nape.|
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