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Crossognathiformes
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Die Crossognathiformes sind eine ausgestorbene marine Knochenfischordnung aus der Klasse der Strahlenflosser (Actinopterygii). Die Gruppe lebte von der Unterkreide bis zum PaleozΓ€n.
Contents
β’ Merkmale
β’ Literatur
β’ Weblinks
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Merkmale
Die Crossognathiformes waren mittelgroΓe Fische mit schlankem Rumpf, langem Kopf und spitzer Schnauze mit einer tiefen Maulspalte. Die kurze, dreieckige RΓΌckenflosse saΓ vor der KΓΆrpermitte. Die Brustflossen waren schlank und schmal, die Schwanzflosse tief gespalten.
ΓuΓere Systematik
Die systematische Position der Crossognathiformes ist unsicher. Sicher ist, das sie zu den Teleostei, den hΓΆheren Knochenfischen gehΓΆren. Louis Taverne ordnet sie als primitive Schwestergruppe der Clupeomorpha und Euteleostei innerhalb der Clupeocephala ein.
Innere Systematik
β’ Familie Crossognathidae
β’ Apsopelix
β’ Crossognathus
β’ Familie Notelopidae
β’ Notelops
β’ Familie Pachyrizodontidae
β’ Aquilopiscis
β’ Elopopsis
β’ Goulmimichthys
β’ Greenwoodella
β’ Michin
β’ Nardopiscis
β’ Pachyrizodus
β’ Platinx (einzige Gattung aus dem PaleozΓ€n)
β’ Rhacolepis
β’ Tingitanichthys
β’ Familie Varasichthyidae
β’ Bobbichthys
β’ Domeykos
β’ Luisichthys
β’ Protoclupea
β’ Varasichthys
Literatur
β’ Joseph S. Nelson, Terry C. Grande, Mark V. H. Wilson: Fishes of the World. Wiley, Hoboken, New Jersey, 2016, ISBN 978-1-118-34233-6
β’ Karl Albert Frickhinger: Fossilien Atlas Fische, Mergus-Verlag, Melle, 1999, ISBN 3-88244-018-X
Weblinks
Commons
: Crossognathiformes
β Sammlung von Bildern, Videos und Audiodateien
β’ The Paleobiology Database Crossognathiformes