-
paraphyletic group. One
family is
unambiguously placed in the order,
Palaeospinacidae. The
families Orthacodontidae,
Paraorthacodontidae and Pseudonotidanidae...
-
Synechodus is an
extinct genus of
shark belonging to the
family Palaeospinacidae and
order Synechodontiformes. It is
known from 16
species primarily spanning...
- Paraorthacodontidae,
though it was
formerly regarded as a
member of the
family Palaeospinacidae,
which is
either placed in
Hexanchiformes or in Synechodontiformes...
- (Rhaetian) Germany A
member of
Synechodontiformes belonging to the
family Palaeospinacidae, a
species of Synechodus.
Thiesus Gen. et sp. nov
Valid Guinot, Cappetta...
-
Paraorthacodontidae (though it was
formerly regarded as a
member of the
family Palaeospinacidae),
which is
either placed in
Hexanchiformes or in Synechodontiformes...
-
family Paraorthacodontidae, (though both
genera were
formerly placed in
Palaeospinacidae) The body is slender, with a
single dorsal fin and a
elongate caudal...
-
dentition and
squamation Osteno Outcrop A Shark, type
member of the
family Palaeospinacidae inside Synechodontiformes. Open
water swimmer.
Squaloraja S. sp. One...
- 'spine') is an
extinct genus of
prehistoric sharks in the
family Palaeospinacidae. The
species N.
elegans is from the Tri****ic of Idaho,
United States...
-
branchial arches and the
anterior finspine Type
member of the
family Palaeospinacidae.
Palidiplospinax P.
smithwoodwardi Holzmaden Articulated vertebral...
-
Northumberland Formation Canada ( British Columbia) A
member of the
family Palaeospinacidae.
Tethytrygon Gen. et comb. nov
Valid Marramà et al.
Eocene (Ypresian)...
