- The
ptyctodontids ("folded-teeth") are
placoderms of the
order Ptyctodontida,
containing the
family Ptyctodontidae. With
their big heads, big eyes, reduced...
- eyes were
vestigial and that the
phyllolepids may have been blind.
Ptyctodontida ("folded teeth") were
lightly armoured placoderms with big heads, big...
- †Antiarchi †Arthrodira †Brindabellaspida †Petalichthyida †Phyllolepida †
Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii...
- †Arthrodira †
Ptyctodontida...
- of
prehistoric cartilaginous fish List of
chimaeras Acanthothoraci Ptyctodontida Froese, Rainer; Pauly,
Daniel (eds.). "Order Chimaeriformes". FishBase...
- †Antiarchi †Arthrodira †Brindabellaspida †Petalichthyida †Phyllolepida †
Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii...
- †Antiarchi †Arthrodira †Brindabellaspida †Petalichthyida †Phyllolepida †
Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii...
- †Antiarchi †Arthrodira †Brindabellaspida †Petalichthyida †Phyllolepida †
Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii...
-
placoderm lineages: Acanthothoraci, Rhenanida, Antiarchi, Petalichthyidae,
Ptyctodontida and Arthrodira.
Spiny sharks,
class Acanthodii, are
extinct fish that...
- †Antiarchi †Arthrodira †Brindabellaspida †Petalichthyida †Phyllolepida †
Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii...
