THÔNG TIN TÀI LIỆU
FOSSIL VERTEBRATES/Mesozoic Amphibians and Other Non-Amniote Tetrapods 521 The Lissamphibian Groups The taxon Lissamphibia applies to the living frogs, salamanders, and caecilians and their immediate relatives They are believed by most workers to be a single adaptive radiation that started to diversify in the Permian, with the frogs demonstrably present in the Lower Triassic The other groups first appear in the Jurassic and are presumed to be as yet undiscovered in Triassic rocks Frogs Frogs occur on all non-polar continents and on many islands, particularly those that are relicts (New Zealand, Madagascar, and the Seychelles) of larger Figure Lissamphibia (A) Reconstruction of the protofrog Triadobatrachus massinoti, from the Lower Triassic, Madagascar; (B) the pipid tadpole Shomronella jordanica, from the Lower Cretaceous, Israel; (C), reconstruction of the primitive salamander Karaurus sharovi, from the Upper Jurassic, Kazakhstan, (D) reconstruction of the primitive caecilian Eocaecilia micropodia, from the Lower Jurassic, Kayenta Formation, Arizona; (E) reconstruction of the albanerpetontid Celtedens ibericus, from the Lower Cretaceous, Las Hoyas, Spain; (F) mandibles of the albanerpetontid Celtedens, showing the unique asymmetrical symphysial articulation Reproduced with permission from (A) Rage, J C and Rocˇek, Z (1989) Redescription of Triadobatrachus massinoti (Piveteau, 1936) an anuran amphibian from the early Triassic Palaeontographica A 206: 16; (B) Estes, R, Sˇpinar, ZV and Nevo, E (1978) Early Createceous pipid tadpoles from Israel (Amphibia: Anura) Herpetologica 34: 374 393; (C) Milner, AR (1994) Chapter Upper Triassic andJurassic amphibians, fossil record and phylogeny 22 In: Fraser, N and Sues, H D (eds), In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods Cambridge: Cambridge University Press; (D) Jenkins, FA and Walsh, D (1993) An early Jurassic caecilian with limbs Nature 365: 246 250; (E) McGowan, G and Evans, SE (1995) Albanerpetontid amphibians from the Cretaceous of Spain Nature 373: 143 145; (F) Fox, RC and Naylor, BG (1982) A reconsideration of the relationships of the fossil amphibian Albanerpeton Canadian Journal of Earth Science 19: 118 128
Ngày đăng: 26/10/2022, 11:01
Xem thêm: