- (Gasconadian) of
North America. The
Dakeoceras s**** is an
endogastric cyrtocone with the
siphuncle on the concave, ventral, side;
moderately curved and...
- the Poterioceratidae, a
family of
subcircular to
compressed exogastric cyrtocones without a
hyponomic sinus.
Mecynoceras has a compressed,
gibbous cyrtoconic...
-
nautiloid cephalopods from the
Ordovician comprising exogastric longiconic cyrtocones, that is no
longer in
common use. The
Order B****lerocerida was established...
- Quebec. The s**** of
Simardoceras is a
moderately expanding exogastric cyrtocone, said to
resemble a
rather large Oncoceras, but with a
siphuncle that...
- in Nova
Scotia and Quebec. S**** are depressed,
irregularly annulated cyrtocones with V-shaped
hyponomic sinuses,
ornamented by
longitudinal and transverse...
- S**** of
Augustocers are slender,
upwardly curved, fusiform,
exogastric cyrtocones with
subtriangular cross-sections,
short chambers,
oblique sutures, and...
- of the
order Oncocerida,
Fayettoceras has a s****
which is a
depressed cyrtocone with a
ventral cyrtochoanitic siphuncle of
elongated ovoid segments strongly...
-
oncocerid found in Ontario. The s**** is a
faintly gibbous exogastric cyrtocone with
subparallel dorsal and
ventral profiles but
adorally converging sides...
- of Australia. The s**** of
Macrodomoceras is a compressed,
endogastric cyrtocone, i.e.
section higher than wide and
curved with the
ventral side concave...
-
Reedsoceras was
named as a
genus characterized by
rapidly expanding exogastric cyrtocones with
unconstricted apertures and
straight sutures. The
siphuncle is close...
