Achalinus tranganensis LUU, ZIEGLER, HA, LO, HOANG, NGO, LE, TRAN & NGUYEN, 2020
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Achalinus tranganensis
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| Higher Taxa | Xenodermidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Trang An Burrowing Snake Vietnamese: Rắn xe điếu tràng an |
| Synonym | Achalinus tranganensis LUU, ZIEGLER, HA, LO, HOANG, NGO, LE, TRAN & NGUYEN 2020 |
| Distribution | N Vietnam (Ninh Binh) Type locality: limestone forest (20°15.266’N, 105°53.677’E, 9 m a.s.l.), near Tran Temple, Trang An Landscape Complex, Ninh Binh Province, northern Vietnam |
| Reproduction | |
| Types | Holotype. VNUF R.2018.21 (field number TA.18.21), adult female, collected by V.Q. Luu, O.V. Lo, N.T. Nguyen on 31 May 2018. |
| Diagnosis | Diagnosis: Achalinus tranganensis sp. nov is characterized by the following combination of morphological characters: 1) maxillary teeth 29; 2) suture between the internasals distinctly longer than that between the prefron- tals; 3) loreal distinctly wider than high, extending from the nasal to the eye; 4) dorsal scales in 25–23–23 rows, keeled; 5) two pairs of prefrontals; 6) supralabials six; 7) infralabials six; 8) temporals 2+3, the two anterior tempo- rals in contact with eye; 9) ventrals 171; 10) subcaudals 73+, entire; 11) cloacal entire; 12) dorsum in preservative reddish to greyish brown above; 13) the lower part of head side and chin region somewhat paler than remaining head; 14) venter greyish cream, with the anterior region of each ventral and subcaudal somewhat darker. |
| Comment | Sympatry: Lycodon futsingensis, L. subcinctus, Oligodon chinensis. Abundance: only known from a single specimen (2023). |
| Etymology | Named after its type locality, the Trang An Landscape Complex, where the new Achalinus was discovered. |
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