Prosymna janii BIANCONI, 1862
Can you confirm these amateur observations of Prosymna janii?
|Higher Taxa||Lamprophiidae, Prosymninae, Colubroidea, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||Mozambique Shovel-snout, Keel-scaled Shovel-snout|
|Synonym||Prosymna janii BIANCONI 1862|
Prosymna jani — LOVERIDGE 1958
Prosymna janii — WALLACH et al. 2014: 580
|Distribution||S Mozambique, Republic of South Africa (N Zululand, Natal)|
Type locality: Inhambane, Mozambique.
|Types||Holotype: MZUB (was: IBI) a 180 mm male.|
|Comment||Habitat: restricted to coastal dune forest and thicket.|
Description. Rostral with angular horizontal edge; separated by the single bandlike internasal from the single prefrontal; frontal large: loreal longer than high; preocular 1; postoculars 2-3; temporals 1 + 2; upper labials 6-7, the third and fourth entering the orbit; lower labials 8, the first four in contact with the sublinguals. Midbody scale-rows 15-17 (15 in Kosi Bay snake, said to be 17 in Inhambane type) keeled; ventrals 113-119; anal entire; subcaudals 3-37 [from LOVERIDGE 1958].
Color. Above, head yellowish, a black crossbar on the pre frontal extends backwards over frontal to unite with a black area covering parietals and nape, except for a light cordiform patch on nape; body pale reddish brown with a double series of conspicuous black spots along the anterior two-thirds of the back. Below, yellowish-white, uniform [from LOVERIDGE 1958].
Remarks. Nothing in the bibliography adds anything to the original descriptions of Bianconi and Jan, which are frequently in disagreement. Ventrals are given as 117 and 119 for the holo- type, subcaudals as 32 and 37. When Peters (1882a) gave the latter as 34 he was perhaps trying to strike an average. Though both give the scale-rows as 17, Jan adds that they are reduced to 15 posteriorly. There are certainly only 15 in the Kosi Bay snake which I have examined, and I suspect that the count of 17 was made in advance of midbody. Only these two examples of this handsome little species are known [from LOVERIDGE 1958].
|Etymology||Named after Giorgio Jan (1791-1866), Austrian-born botanist and professor in Parma and Milan, Italy.|