-
hypothesis is due to the fact that
stethacanthids and
symmoriids are
poorly defined;
symmoriids are
thought to lack a spine-brush
complex but are otherwise...
-
upturned pectoral fins, and club-like tails. †Debeeriiformes †Symmoriida
Symmoriids Zangerl, 1981 (sensu Maisey, 2007) 4
Members of the holocephali, they...
-
toward the
caudal fin. The
packed neural arches are
similar to
those of
symmoriid and
stethacanthid holocephalians. The
holotype has a 16
centimetres (6...
-
patelliformis Steeplehouse Quarry.
Thousands of
dermal denticles. A
symmoriid and the most
abundant vertebrate in the formation.
Reesodus R. wirksworthensis...
- claspers.
Pleuropterygii was
later expanded to
incorporate ctenacanthids and
symmoriids,
which were
similar to
Cladoselache in
geological age,
cladodont tooth...
- This
condition is also seen in
symmoriids and is
unique among known elasmobranchs of any time. So,
either symmoriids are the
females of some stethacanthids...
-
resembles a 3D-preserved model. At first, the
skull was
thought to
belong a
symmoriid shark, but
after the CT-scanning, the
image appeared to show anatomical...
