-
marine and
shallow marine habitats. Some
xenacanths may have
grown to
lengths of 5 m (16 ft). Most
xenacanths died out at the end of the
Permian in the...
- 'foreign, alien' + ἄκανθος, akanthos, 'spine') is an
extinct genus of
xenacanth cartilaginous fish. It
lived in
freshwater environments, and
fossils of...
-
produced by some
extinct chondricthyan groups, such as
hybodonts and
xenacanths. Egg
cases are made of
collagen protein strands, and are
often described...
-
stingray Hemitrygon bennettii Frilled shark Chlamydoselachus anguineus The †
xenacanth †Lebachacanthus senckenbergi**** The †symmoriiform †Stethacanthus productus...
- Some
prehistoric sharks (in a
broad sense),
including hybodonts and
xenacanths, are also
thought to have
inhabited freshwater environments. A
small number...
- Holocephalans, and
potential members of the symmoriida. †Xenacanthiformes
Xenacanths Glikman, 1964 4 Eel-like
elasmobranchs that were some of the top freshwater...
-
Lebachacanthus is a
genus of
extinct xenacanth cartilaginous fish
known from the late Carboniferous-Early
Permian of Europe. Well-preserved specimens...
- PMID 38230382. Johnson, Gary D.; Thayer,
David W. (2009). "Early
Pennsylvanian Xenacanth Chondrichthyans from the
Swisshelm Mountains, Arizona, USA". Acta Palaeontologica...
- doi:10.1016/j.coal.2013.07.009. ISSN 0166-5162. Johnson, Gary D. (2013). "
Xenacanth sharks and
other vertebrates from the
Geraldine Bonebed,
Lower Permian...
- just to name a few. The
rivers were
roamed by
Orthacanthus texensis (a
xenacanth "shark") and
Ectosteorhachis nitidus (a
megalichthyid fish).
Fossil bonebeds...
