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Monotypic taxon:
Family †
Orthacodontidae
Glickman, 1957
(fish)
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Entity:
Hexanchiformes (Order) - six-gill sharks
..Chlamydoselachidae (Family) - frill sharks
..[Chlamydoselachoidei] (Suborder)
..†Crassodontidanidae (Family)
..[Heptranchidae] (Family)
..[Heptranchiidae] (Family)
..Hexanchidae (Family) - cow sharks
..[Hexanchoidei] (Suborder)
..†Komoksodontidae (Family)
..†Notidanodon (Genus)
..†Notidanoides (Genus)
..[Notorynchidae] (Family)
..[†Paraorthacodontidae] (Family)
..[†Orthacodontidae] (Family)
....[†Sphaenodus] (Genus)
Authorship
SN2000 author citation
:
Glickman, 1957, orth. corr.
Original name & rank
:
Glickman, 1957: 114. ["
Orthacodidae
"].
Subsequent spelling
:
de Beaumont, 1960: 4.
Attributes
Justified emendation (: orth. corr.) [ICZN, 1999: Art. 33.2.2]
Ref:
R. van der Laan, 2018.
Eur. J. Taxon.
466
: 41 ("corrected").
Types
Type
:
†
Orthacodus
(Genus)
Woodward, 1889, nom. illeg.
Type, by synonymy
:
†
Sphenodus
(Genus)
Agassiz, 1843
Ref:
J.S. Nelson, 2006
: 64.
[indirect]
Synonyms
In
:
†
Palaeospinacidae
(Family)
Regan, 1906
Ref:
R. van der Laan, 2018
: 41.
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Last updated:
21 Sep 2025