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Stethacanthus
Temporal range: 382.7–298.9 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Late Devonian to Late Carboniferous
Restoration of S. altonensis and S. productus
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Class:
Chondrichthyes
Order:
†Symmoriiformes
Family:
†Stethacanthidae
Genus:
†Stethacanthus Newberry, 1889
Type species
Stethacanthus altonensis
St. John and Worthen, 1875[5]
Other species
S. concavus Ginter, 2018[1]
S. gansuensis Wang et al., 2004[2]
S. neilsoni
S. praecursor Hussakof & Bryant, 1918[3]
S. resistens
S. thomasi
S. productus Newberry, 1897[4]
Synonyms
Symmorium reniforme? Cope, 1893
Stethacanthus is an extinct genus of shark-like holocephalians[6] which lived from the Late Devonian to Late Carboniferous epoch, dying out around 298.9 million years ago. Fossils have been found in Australia, Asia, Europe and North America.
^Michał Ginter (2018). "Symmoriiform sharks from the Pennsylvanian of Nebraska". Acta Geologica Polonica. 68 (3): 391–401. doi:10.1515/agp-2018-0009 (inactive 31 January 2024).{{cite journal}}: CS1 maint: DOI inactive as of January 2024 (link)
^"Fossilworks: Stethacanthus gansuensis".
^"Fossilworks: Stethacanthus praecursor".
^"Fossilworks: Stethacanthus productus".
^"Fossilworks: Stethacanthus altonensis".
^Coates, M., Gess, R., Finarelli, J., Criswell, K., Tietjen, K. 2016. A symmoriiform chondrichthyan braincase and the origin of chimaeroid fishes. Nature. doi: 10.1038/nature20806
bizarre shapes including Stethacanthus which possessed a flat brush-like dorsal fin with a patch of denticles on its top. Stethacanthus's unusual fin may have...
such as in †Hybodontiformes, †Ctenacanthiformes or †Xenacanthida. In †Stethacanthus, the first dorsal fin spine was modified, forming a spine-brush complex...
spine, dentition teeth, and dermal denticles of these sharks. The genus Stethacanthus was established by Newberry (1889) for a series of large thin walled...
of unknown function. This is also found in the better known genus Stethacanthus. Remains have only been found near Bearsden in Scotland. The genus name...
a small group of bizarre chondrichthyans such as the bristle-spined Stethacanthus. Cladoselache and symmoriiforms may be more closely related to chimaeras...
genera Ctenodus, Uronemus, Acanthodes, Cheirodus, and Gyracanthus. Stethacanthus As a result of the evolutionary radiation, carboniferous cartilaginous...
arranged tail-first where the shark's stomach should be. Around this time, Stethacanthus also begins to appear in the fossil record. Also a cladodont, it survived...
are instead preyed upon by large predatory fish, such as the shark Stethacanthus and the two-ton giant Hyneria. 2 "Reptile's Beginnings" 300/280 mya...
Petalodus. Symmorium bears close similarity in size and appearance to Stethacanthus but the former is missing the "spine and brush" on its back. Some paleontologists...
2-90 mm in length. This species was considered as a junior synonym of Stethacanthus obtusus by Lebedev (1996) but later reassigned to Cladodus due to a...
described the new genus Eryops. 1889 Newberry described the new genus Stethacanthus. 1899 Karpinsky described the new genus Helicoprion. Jeram described...
related form or using admittedly obsolete nomenclature †Spyroceras †Stethacanthus †Stigmaria †Stigmatella †Strophomena †Strophomena alpenensis †Strophomena...
et al. Late Cretaceous (Cenomanian and Turonian) Haycock Australia Stethacanthus concavus Sp. nov Valid Ginter Carboniferous (Gzhelian) Indian Cave United...
hydei Monocladodus M. sp. Orodus O. spp. (x3) Phoebodus P. politus Stethacanthus S. altonensis S. carinatus Tamiobatis T. vetustus T. cf. T. vetustus...
or unidentified comparable form †Sphenopteris †Stearoceras †Stethacanthus †Stethacanthus altonensis †Stigmaria †Strophomena †Symmorium – type locality...
the new genus Eusthenopteron. 1889 Newberry described the new genus Stethacanthus. 1894 Dean described the new genus Cladoselache. 1932 Säve-Söderbergh...
locality for species †Stethacanthulus meccaensis †Stethacanthus †Stethacanthus altonensis †Stethacanthus longipeniculus – type locality for species †Stictoporina...
for genus †Stereophallodon ciscoensis – type locality for species †Stethacanthus †Strepsodiscus †Strophomena †Strophomena neglecta †Syringopora – tentative...
†Stereostylus aages – type locality for species †Stethacanthus †Stethacanthus depressus †Stethacanthus erectus †Stictopora †Stictostroma †Stictostroma...