- pad-shaped and diphycercal. The
dermal bones of
arandaspids consist of
aspidine (acellular bone) and are
ornamented with oakleaf-shaped
tubercles which...
- the birkeniids, the body was
covered in rows of tile-like
scales made of
aspidine, an
acellular bony tissue.
Anaspids all had prominent,
laterally placed...
- of dentine, with a sometimes-ornamented
enameloid upper surface and an
aspidine base. Its
growing base is made of cell-free bone,
which sometimes developed...
- of dentine, with a sometimes-ornamented
enameloid upper surface and an
aspidine (acellular bony tissue) base. Its
growing base is made of cell-free bone...
-
superficially like a tadpole,
albeit covered in bony
plates composed of the
tissue aspidine,
which is
unique to
heterostracan armor.[citation needed]
Cyathaspis ludensis...
-
dorsal and
ventral shield is made up by
numerous polygonal platelets of
aspidine,
ornamented with
large dentine tubercles capped with a
thick enameloid...
-
distinct from
other vertebrates,
having three layers composed of
dentine and
aspidine, an
acellular bony
tissue unique to
animals of this
class and Thelodonti...
