-
Cephalaspidida is an
extinct order of
jawless fish in the
subclass Cornuata. Undichna, a fish-fin, or fish-swimming
fossil trail left as a
fossil impression...
- two
major groups, the more
primitive heterostracans and the
cephalaspids. The
cephalaspids were more
advanced than the
heterostracans in that they had...
-
classification of lampreys,
because lampreys were once
thought to be
related to
cephalaspids. If
lampreys are included, they
would extend the
known range of the group...
- sand slug, is a
species of
predatory sea slug with an
internal s****, a
cephalaspid opisthobranch, or head-shield slug. It is a
marine gastropod mollusc...
-
classification of lampreys, as
lampreys are
sometimes thought to be
related to
cephalaspids. If
lampreys are included, they
would extend the
known range of the group...
- s**** of the
Volvatellidae and
Oxynoidae somewhat resemble those of the
cephalaspid bubble snails. The
Juliidae are
extraordinary in that they are s****ed...
- Søsterøyene.
Ringerike sandstone is
found in some
parts of Jeløya, and
fossil cephalaspids have been found. The
largest Norwegian moraine from the Ice Age crosses...
-
Uppsala University.
cephalaspidomorphi at users.atw.hu/fishindex On the
cephalaspid fauna of the
Podolian plateau. PP
Balabai -
aukovi zapysky Naukovo-pryodo-znavcogomuzeâ...
- to
Devonian period in what is now
Europe and
North America. A
typical cephalaspid,
Hemicyclaspis had a
heavily armored, shovel-shaped headshield. It is...
- of the Cephalaspidomorphi.
Fossil evidence now
suggests lampreys and
cephalaspids acquired their shared characters by
convergent evolution. The 5th edition...
