-
Archiacoceratidae are
represented by only two or
three (Sweet, 1964). The s**** of
oncocerids are
primarily somewhat compressed cyrtoconic brevicones. More advanced...
- from the
middle Devonian of the
United States Lorieroceras was a
bizarre oncocerid nautiloid from the
Devonian that
possessed a
helically coiled s**** A...
- an
impressed zone on the
inner rim, or dorsum. Both are
close to
their oncocerid ancestors in that
their siphuncles contain laminar actinosiphonate deposits...
- PMID 22649542. Manda, Štěpán; Turek, Vojtěch (2009). "Minute
Silurian oncocerid nautiloids with
unusual color patterns". Acta
Palaeontologica Polonica...
- undetermined.
Externally Pseudobrevicoceras resembles Brevicoceras, an
oncocerid in the Brevicoceratidae, in
having a curved, expanded,
breviconic phragmocone...
-
Maelonoceras is a Late
Ordovician -
early Silurian oncocerid found in Ontario. The s**** is a
faintly gibbous exogastric cyrtocone with
subparallel dorsal...
- Akt****cheilus is a
genus of
oncocerid nautiloids from the
Upper Devonian (M Famenian)
included in the Acleistoceratidae, a
family characterized by depressed...
-
Minganoceras is a
genus in the
oncocerid family, Valcouroceratidae,
named by Foeste, 1938, from the
Middle Ordovician of Quebec,
found on
Mingan Island...
-
Balashovia is a
genus of
oncocerid nautiloids from the
Middle Devonian, (lower Eifelian),
included in the Archiacoceratidae, a
family characterized by...
-
Lorieroceras lorieri is an
extinct oncocerid nautilitoidean cephalopod belonging to the
family Nothoceratidae.
Fossils are
found in
Lower Devonian marine...
