Podrobnosti záznamu

    Mesozoic and Tertiary Anura of Laurasia
    Roček, Zbyněk
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Palaeobiodiversity and Palaeoenvironments
    Roč. 93, č. 4
    s. 397-439
    Rozsah: 44 s. : E
Předmětová kategorie
    systematic review
    taxonomic diagnoses
Klíčové slovo
Abstrakt (anglicky)
   Anurans of Laurasia have a long history that begins with the earliest known anuran, Prosalirus, from the Early Jurassic of Arizona, USA. At that time, western Laurasia (North America) was still connected with Gondwana, so faunal interchange was still possible between those parts of the former Pangean supercontinent. The anuran fossil record from the Jurassic and Cretaceous of Laurasia is mainly represented by disarticulated skeletal elements similar to those of Prosalirus (e.g. amphicoelous vertebrae indicating the presence of continuous notochord; ilia without dorsal crest and dorsal tubercle; small body size). Because the morphology of the ilium, the most commonly preserved element of Mesozoic anurans, superficially recalls that of Recent Alytes, Bombina or Pelobates, Mesozoic anurans often were assigned to discoglossids and pelobatids.
   The Cretaceous portion of the Laurasian anuran record is marked by the appearance of procoelous and opisthocoelous vertebrae, ilia bearing a dorsal crest and dorsal tubercle (although such ilia may rarely be found as early as in the Jurassic) and larger body sizes. Cretaceous anuran assemblages include a mix of generalised taxa that are comparable to Recent basal anurans and more specialised taxa lacking clear affinities with any extant anurans. Some of these forms survived into the Paleocene, but in general anuran faunas on all Laurasian continents were markedly depleted in the Paleocene. Major groups of anurans appeared in the Eocene. The early Miocene is the interval when Eurasian and American herpetofaunas reached their peak taxonomic diversities. In the Pliocene, some extant anuran species appeared, but at the same time taxa that had been dominant throughout the Oligocene and Miocene (e.g.
   Eopelobates, palaeobatrachids) became extinct during this interval or during the subsequent Pleistocene glaciation.
    AV ČR Brno, Geologický ústav
Kód přispěvatele
    AV ČR, GLÚ
Zdrojový formát
Datum importu
    23. 10. 2014