Hebius arquus (DAVID & VOGEL, 2010)
Can you confirm these amateur observations of Hebius arquus?
|Higher Taxa||Colubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Synonym||Amphiesma arquus DAVID & VOGEL 2010|
Hebius arquus — GUO et al. 2014
Amphiesma arquus — WALLACH et al. 2014: 28
Type locality: “Borneo”
|Types||Holotype: NMW 37943, an adult male. Deposited by Franz Steindachner, 1878.|
|Diagnosis||Diagnosis. A species of the genus Amphiesma, characterized by a combination of the following characters: (1) elongate body; (2) a long tail, amounting for 30% of the total length; (3) 17 gradually enlarged maxillary teeth, followed without diastema by 3 moderately enlarged posterior teeth; (4) nostrils slightly dorsolateral; (5) 17 – 17 – 15 DSR, all strongly keeled; (6) no loreal, prefrontal in contact with SL 2 – 3; (7) a high number of ventrals (187); (8) supralabials dark, the first seven supralabials ornate on their upper part by an arched white streak; and (9) a largely obscured venter. A comparison with other species of the genus Amphiesma and of other natricine genera of Borneo and adjacent regions is given in the Discussion. The pattern of supralabials, the high number of ventral scales and the lack of loreal scales are enough to distinguish Amphiesma arquus sp. nov. from all other natricine species.|
Amphiesma arquus sp. nov. is distinguished from other species of the Sunda Region by the combination of an elongated body, 17 + 3 enlarged maxillary teeth, 17 – 17 – 15 dorsal scale rows, all strongly keeled, absence of a loreal, a high number of ventrals and subcaudals, supralabials ornate with white arched markings, and an obscured venter.
|Etymology||The specific nomen is the Latin noun arquus (-us), meaning “arches,” by reference to the white arched streaks on the upper part of each anterior supralabial. It is here considered a noun in apposition in the plural, and not an adjective.|