- (e.g. †Birgeria, †Bobasatrania).
Heterocercal is the
opposite of
hypocercal Hypocercal, also
known as
reversed heterocercal,
means that the
vertebrae extend...
- distensible. The
transparent fins are spineless; the
deeply forked and
hypocercal caudal fin is most striking, with the
lower lobe
extended to a length...
- or shields. The
fossils show
extensive shielding of the head. Many had
hypocercal tails in
order to
generate lift to
increase ease of
movement through the...
- that
lacked a
heavy bony
shield and
paired fins, but were
distinctively hypocercal.
Compared to many
other ostracoderms, such as the
Heterostraci and Osteostraci...
- with a fish-like
fusiform body
including well
developed dorsal fin,
hypocercal caudal fin,
paired pectoral and
pelvic fins, and
remarkably large eyes...
- ('wing-shield forms') have
extensive shielding of the head. Many had
hypocercal tails in
order to
generate lift to
increase ease of
movement through the...
-
fossil record are
Endeiolepis and Euphanerops, fish-like
animals with
hypocercal tails that
lived during the Late
Devonian Period. Some paleontologists...
-
other Mosasauridae in many respects,
halisaurines had the
distinctive hypocercal tail of
other mosasaurids suggesting good
swimming ability, and they persisted...
-
jawless fish. The
fossils show
extensive shielding of the head. Many had
hypocercal tails to
generate lift to
increase ease of
movement through the water...
- well-developed,
dorsal and anal fins;
these and the
hypercercal and much
larger hypocercal lobes forming a
heterocercal tail
resemble features of
modern fish that...
