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The word amphibian is derived from the Ancient Greek term ἀμφίβιος (amphíbios), which means 'both kinds of life', ἀμφί meaning 'of both kinds' and βίος meaning 'life'. The term was initially used as a general adjective for animals that could live on land or in water, including seals and otters. [8]
The generic name comes from Nohoch ("great") and ich'ak ("claw"), a translation of the Greek family name Megalonychidae. The specific name is from Xibalba ("the underworld") and ahkah ("dweller") [181] Nopal (Opuntia cochinellifera) cactus: Nahuatl: From nohpalli, via Spanish [citation needed] Nystalus chacuru (white-eared puffbird) puffbird ...
The frog's eyes are on top of the head, looking upwards. The pupils are circular. They have no moveable eyelids, tongues (rather it is completely attached to the floor of the mouth [6]) or eardrums (similarly to Pipa pipa, the common Suriname toad [7]). [8] Unlike most amphibians, they have no haptoglobin in their blood. [8]
The African clawed frog (Xenopus laevis), also known as simply xenopus, African clawed toad, African claw-toed frog or the platanna) is a species of African aquatic frog of the family Pipidae. Its name is derived from the short black claws on its feet. The word Xenopus means 'strange foot' and laevis means 'smooth'.
Except in the family Salamandridae, the head, body, and tail have a number of vertical depressions in the surface which run from the mid-dorsal region to the ventral area and are known as costal grooves. Their function seems to be to help keep the skin moist by channeling water over the surface of the body. [13] Sirens have an eel-like appearance.
This week, meet a shroom frog, explore an asteroid shaped by a NASA mission, marvel at a fish louder than elephant, get an update on Odie’s moon landing, and more.
[17] [18] Unlike other modern amphibians (frogs and salamanders) the skull is compact and solid, with few large openings between plate-like cranial bones. The snout is pointed and bullet-shaped, used to force their way through soil or mud. In most species the mouth is recessed under the head, so that the snout overhangs the mouth. [10]
Little is known about the longevity of frogs and toads in the wild, but some can live for many years. Skeletochronology is a method of examining bones to determine age. Using this method, the ages of mountain yellow-legged frogs ( Rana muscosa ) were studied, the phalanges of the toes showing seasonal lines where growth slows in winter.