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In reptiles, the supralabial scales, also called upper-labials, are those scales that border the mouth opening along the upper jaw. They do not include the median scale[1] (rostral scale). The term labial originates from Labium (Latin for "lip"), which refers to any lip-like structure. The numbers of these scales present, and sometimes the shapes and sizes, are some of many characteristics used to differentiate species from one another.

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See also

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References

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  1. ^ Wright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates (7th printing, 1985). 1105 pp. ISBN 0-8014-0463-0.

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Puff adder

three or four scales separate the suboculars and the supralabials. It has 12 to 17 supralabials and 13–17 sublabials. The first three or four sublabials

Buff striped keelback

second supralabial (upper lip shield); The rostral touches a total of 6 shields. These are two inter-nasals, two nasals and the first supralabial on each

Gaboon viper

Four or five scale rows separate the suboculars and the supralabials, with 13–18 supralabials and 16–22 sublabials. The fangs may reach a length of 55 mm

Russell's viper

The snake has 10–12 supralabials, the fourth and fifth of which are significantly larger. The eye is separated from the supralabials by three or four rows

Vipera aspis

distance between the eye and the mouth. There are 9–13 supralabials. The 4th–5th supralabials (rarely 4th–6th or 5th–6th) are separated from the eye by

Naja obscura

separating the eye from the supralabials, whereas Naja obscura lacks suboculars, with the eye being in contact with two supralabials. Naja nubiae also lacks

Pituophis catenifer deserticola

29–35 Ventrals 214–259 Caudals 54–71, divided Anal entire Prefrontal scales usually 4 Supralabials 8–10 Infralabials 9–15 Preoculars 1–2 Postoculars 2–6

Bungarus suzhenae

including upper part of supralabials are uniform black. The lower half of its head, including the lower part of supralabials and rostral are yellowish-white