Atractus akerios MELO-SAMPAIO, PASSOS, PRUDENTE, VENEGAS & TORRES-CARVAJAL, 2021
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Atractus akerios
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| Higher Taxa | Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | |
| Synonym | Atractus akerios MELO-SAMPAIO, PASSOS, PRUDENTE, VENEGAS & TORRES-CARVAJAL 2021: 733 Atractus badius – CUNHA & NASCIMENTO 1978 (partim) Atractus schach – CUNHA & NASCIMENTO 1983 Atractus schach – PASSOS & FERNANDES 2008 (partim) Atractus schach – PRUDENTE & PASSOS 2008 (partim) Atractus schach – PRUDENTE et al. 2018 Atractus schach – CUNHA & NASCIMENTO 1993 Atractus snethlageae – PRUDENTE et al. 2018 (partim) |
| Distribution | Brazil (Maranhão) Type locality: Brazil, Maranhão, Junco do Maranhão, at Nova Vida (1.822°S, 46.109°W), 39 m asl, |
| Reproduction | |
| Types | Holotype: MPEG 12255, adult male, collected by O.R. da Cunha and F.P. do Nascimento on 1 June 1976. Paratopotypes (n = 4): MPEG Paratypes (n = 6): MPEG |
| Diagnosis | Diagnosis: Atractus akerios can be distinguished from all congeners by unique combination of the following characters: (1) smooth dorsal scale rows 17/17/17; (2) postoculars two; (3) loreal moderately long; (4) temporal formula 1+2; (5) supralabials usually seven, third and fourth contacting eye; (6) infralabials seven, first four contacting chinshields; (7) maxillary teeth usually six; (8) gular scale rows three; (9) usually four preventrals; (10) ventrals 149–156 in females, 140– 154 in males; (11) subcaudals 19–20 in females, 24–33 in males; (12) in preservative, dorsum salmon colored to antique brown with russet spots; (13) in preservative, venter sayal brown with Verona brown spots; (14) body moderately long in females (maximum 360 mm SVL) and short in males (290 mm SVL); (15) tail short in females (9.4% of SVL) and moderately long in males (11.7–16.3% of SVL); and (16) hemipenes moderately bilobed (≥half the length of capitulum), semicapitate and semicalyculate (Melo-Sampaio et al. 2021). |
| Comment | Synonymy: from Melo-Sampaio et al. 2021 |
| Etymology | The specific epithet "akerios" in the Greek means life-less. The word is related to the Greek goddess Keres, (Κῆρες) who personifies violent death and destruction. We draw a parallel, where this new species is named after the sudden disappearance in one of the main areas explored and well-studied in relation to Amazonian snakes. |
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