Atractus microrhynchus (COPE, 1868)
Can you confirm these amateur observations of Atractus microrhynchus?
Atractus microrhynchus
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| Higher Taxa | Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | |
| Synonym | Rhabdosoma microrhynchum COPE 1868: 102 Atractus microrhynchum — SAVAGE 1960: 52 Atractus microrhynchus — PETERS & OREJAS-MIRANDA 1970: 31 Atractus microrhynchus — DA SILVA & SITES 1995 Atractus microrhynchus — PASSOS et al. 2009 Atractus microrhynchus — WALLACH et al. 2014: 76 |
| Distribution | Ecuador, Peru (Tumbes region) Type locality: Guayaquil, Ecuador (02º10’S, 79º54’W, ca. 50 m elevation); neotype locality: Reserva Biológica Buenaventura (03°38’55’’ S, 79°45’50’’ W, ca. 600 m asl), Parroquia Piñas,Cantón Piñas, El Oro Province, Ecuador |
| Reproduction | oviparous |
| Types | Neotype: MECN (was DHMECN) 3008, Adult male, designated by Passos et al. 2012; Holotype: CAS 6693, Unknown sex, (California Academy of Science), from Guayaquil, province of Guayas, Ecuador, collected by the Orton Expedition in 1865. Savage (1960) pointed out that the holotype was missing at the CAS and it is probably lost (see Remarks). Also given as USNM 6693 (lost) |
| Diagnosis | Diagnosis: Atractus microrhynchus is distinguished from all congeners by the following combination of characters: (1) 17/17/17 smooth dorsals; (2) one or two postoculars; (3) loreal long; (4) temporals 1+2; (5) seven supralabials, third and fourth contacting orbit; (6) unknown number of infralabials, first two contacting chinshields; (12) dorsum uniformly dark brown, with a incomplete occipital light band; (13) venter light brown with dark brown dots in the lateral region of ventrals; (14) small body size (but the age and sex were unreported in the original description, likely based on a juvenile specimen), holotype about 100 mm SVL [from PASSOS et al. 2009]. Updated diagnosis in Passos et al. 2012: 378. |
| Comment | Synonymy: Has been synonymized with Atractus badius by DIXON & SOINI (1977). Similar species: A. dunni (for examples of misidentifications see Passos et al. 2022). Passos et al. (2012) restricted the concept of A. microrhynchus to the Pacific lowland populations from Ecuador and Peru, and they designated a neotype for the species. Habitat: Lowland Seasonal Evergreen forest near sea level Abundance: Rare. This is one of the species called 'lost' and 'rediscovered' by Lindken et al. 2024. |
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