Proahaetulla antiqua MALLIK, ACHYUTHAN, GANESH, PAL, VIJAYAKUMAR & SHANKER, 2019
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Proahaetulla antiqua
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| Higher Taxa | Colubridae, Ahaetuliinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | |
| Synonym | Proahaetulla antiqua MALLIK, ACHYUTHAN, GANESH, PAL, VIJAYAKUMAR & SHANKER 2019 |
| Distribution | India (Tamil Nadu) Type locality: near Agasthiyar peak (8 ̊37’09’’N 77 ̊14’57’’E), Agasthyamalai hills, Kalakad Mundanthurai tiger reserve, Tamil Nadu, India. |
| Reproduction | |
| Types | Holotype: CES 259 (given as CESS); adult male; Coll. Saunak Pal and S. P. Vijayakumar, 28th August 2011. Paratype: CESS318; adult male; Pandimotta (8 ̊49’35’’N 77 ̊13’02’’E), Shendurney Wildlife Sanctuary, Thenmala, Kerala, India; Coll. S.R. Chandramouli and K. P. Dinesh, July 2012. |
| Diagnosis | Diagnosis (genus): Morphologically, Proahaetulla is characterized by the presence of horizontally elliptical pupil; concave loreal region, enabling a near-binocular vision; snout produced forward to a fine point; and bright-green dorsum. Proahaetulla gen. nov. differs from Ahaetulla (A. anomala, A. nasuta, A. dispar, A. pulverulenta, A. mycterizans, A. fasciolata, A. fronticincta & A. prasina) in showing the following combination of morphological characters: 12–13 rows of mildly serrated, keeled dorsal scales starting from the nape till the dorsal scales that are situated in the row adjacent to the cloacal plate; strongest keels on the mid vertebral row (7th or 8th row) of scales; keels consecutively weaker in the paravertebral row of scales (dorsal scales smooth in most Ahaetulla, partly keeled near sacral region in A. perroteti); a set of 20 maxillary teeth (12–16 in Ahaetulla) and post-ocular scales 2–3 (2 in Ahaetulla); greenish yellow tongue with black speckles (vs. reddish, purplish or brownish tongue in Ahaetulla spp.). Proahaetulla gen. nov. differs from all the known genera in Ahaetuliinae as follows:pupil horizontally elliptical (vs. rounded in Dendrelaphis, Chrysopelea); snout tip pointed (vs. rounded in Dendrelaphis, Chrysopelea); dorsum verdant green (vs. never totally green in Dendrelaphis, Chrysopelea, Dryophiops); dorsal scales keeled (vs. smooth in Dendrelaphis, Dryophiops, Ahaetulla); vertebral scales not enlarged (vs. enlarged in Dendrelaphis); dorsal body scales without apical pits (vs. with apical pits in Dendrelaphis, Chrysopelea, Dryophiops); maxillary teeth 20 (vs. < 16 in Ahaetulla; > 22 in Dendrelaphis, Chrysopelea); mid body scale rows 13–15 (vs. not less than 15 in Dryophiops, Ahaetulla; 17 in Chrysopelea) (Table 3 in Mallik et al. 2019: 10). |
| Comment | Type species: Proahaetulla antiqua is the type species of the genus Proahaetulla MALLIK, ACHYUTHAN, GANESH, PAL, VIJAYAKUMAR & SHANKER 2019. |
| Etymology | The specific epithet antiqua is Latin for ‘antique’ or old, a term alluding to the evolutionary age or antiquity of this new taxon. The generic epithet Proahaetulla gen. nov. stems from the generic nomen Ahaetulla indicating the early divergence of the lineage from the rest of the Ahaetuliinae members. Gender feminine. |
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