- differences. All pre-Cretaceous "Spirorbis"
fossils are now
known to be
microconchids.
Their classification at the
phylum level is
still debated. Most likely...
-
closely related to
other taxa of
uncertain affinity,
including the
microconchids, cornulitids, and tentaculitids.
Spirally coiled trypanoporids (Devonian)...
-
occurred in
South China.
Serpulids appeared in the
Middle Tri****ic.
Microconchids were abundant. The s****ed
cephalopods called ammonites recovered, diversifying...
-
brachiozoans and
annelids as
possible sister taxa. The
extinct hederelloids,
microconchids, cornulitids, and
tentaculitids were
likely lophophorates based on their...
-
Punctaconchus is a
genus of
microconchid tubeworms. It was the last
genus of
microconchids, and the only
genus to
exist beyond the Tri****ic.
Their tubes...
- (amphibians, reptile),
brackish or
euryhaline (ostracods, eurypterids,
microconchids, fish), and
marine (brachiopods, echinoderms) fossils.
According to...
- bryozoans,
diverse and
abundant brachiopods, the
enigmatic hederellids,
microconchids, and corals. Lily-like
crinoids (animals,
their resemblance to flowers...
-
periods are the
remains of an
extinct order of
lophophorates (now
called microconchids)
unrelated to
modern marine tube-worms (Annelids) to
which the genus...
- from a
common origin. The
impunctate tubes are
greatly elongated for
microconchids and have
occasional diaphragms with
central pits. The
tubes branch in...
- s**** of
uncertain affinity including cornulitids, Anticalyptraea,
microconchids and trypanoporids.
Their s****
microstructure has
warranted their comparison...
