-
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...
-
found in mid
Silurian sediments in Europe. The s**** is a
longiconic cyrtocone, like that of
Jovellania or Mixosiphonoceras,
except for
being compressed...
- Penn, Ont.) The s**** of
Baeopleuroceras is a short,
rapidly expanding cyrtocone,
curved through at
least 90 degrees. The body
chamber is one half the...
- Quebec. The s**** of
Gaspocyrtoceras is a co****ly
annularted exogastric cyrtocone.
Curvature is upward, the
ventral side
convex in profile. Annulations...
-
Mingan Island. The s**** of
Minganoceras is a
slender depressed exogastric cyrtocone,
curved so that the underside, the venter, is
longitudinally convex and...
- of the
order Oncocerida,
Fayettoceras has a s****
which is a
depressed cyrtocone with a
ventral cyrtochoanitic siphuncle of
elongated ovoid segments strongly...
- in Nova
Scotia and Quebec. S**** are depressed,
irregularly annulated cyrtocones with V-shaped
hyponomic sinuses,
ornamented by
longitudinal and transverse...
- Quebec. The s**** of
Simardoceras is a
moderately expanding exogastric cyrtocone, said to
resemble a
rather large Oncoceras, but with a
siphuncle that...
-
North America. The s**** of
Laureloceras is a smooth, slender,
compressed cyrtocone or
gyrocone with the
venter more
narrowly rounded than the dorsum. Sutures...
