W F B 3000 Lecture Notes - Lecture 3: Nuptial Pad, Telmatobius, Amplexus
19 Oct 2017
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Document Summary
Dorsolateral ridges: raised ridges running along the back of many frogs. Usually behind the eye and can extend to the groin. Lack of dorsolateral ridges & length of them can help identify species. Lack of & size of tympanum can help identify species or sex. Parotid glands: raised concentration of granular glands possessed by many toads that produce poison; usually shaped like kidney beans and connected to cranial ridges. Size and shape of parotid glands, and whether or not they touch cranial ridges can help identify species. Most have 3 distinct life stages and go through metamorphosis (change in shape throug time) Larva develop hind legs first ind at s can rough. Cant move on land as well as an adult. Direct development: metamorphosis takes place in the egg- hatchlings are miniature adults. Sexual dimorphism: occurs when morphology of males and females differs. Many anurans are sexually dimorphic- but only during the breeding season.
