-
deposits well developed,
fusing to form a
thick lining on the
ventral siphuncular wall. The
endosiphuncular canal system consists of a
central canal that...
- 0.CO;2. ISSN 0022-3360. Mutvei,
Harry (2016-04-02). "
Siphuncular structures in
Calciosiphonate nautiloid orders Actinocerida, Orthocerida...
-
Danaoceras has a
laterally compressed s****
curved such that the
ventral or
siphuncular side is
longitudinally concave, i.e. is endograstric. The siphuncle,...
- with a
subtriangular to
depressed cross-section in
which the
ventral (
siphuncular) side is
typically angular or more
acutely rounded than the
dorsal (antisiphuncular)...
-
fossil straight s****ed nautiloids,
cylindrical calcareous growths ("
siphuncular deposits")
around the
siphuncle can be seen
towards the apex of the s****...
-
similar to
Paraplectronoceras except for
having more
strongly expanded siphuncular segments and less
concave septa. Chen Jun-yuan et al., 1979 Late Cambrian...
-
Calciosiphonata and a new
order Cyrtocerinida of the
subclass Nautiloidea;
siphuncular structure in the
Ordovician nautiloid Bathmoceras (Cephalopoda)". GFF...
- is a
genus of long, straight, and
slender actinocerid nautiloid with
siphuncular segments in the
early stages like
those of Actinoceras,
becoming narrower...
-
Kochoceras of the Actinoceratidae, but with re****bent
septal necks. The
first siphuncular segment is large, broad, and blunt. Selkirkoceras,
which is
known from...
- s****; the
apical and
apertural ends are unknown. Mutvei,
Harry (1997). "
Siphuncular structure in
Ordovician endocerid cephalopods". Acta Palaeontologica...
