-
large lips, each with 2 papillai,
amphidial pore at
lateral edge of each
subventral lip. Its lip
support is
lightly sclerotized.
Cervical papillae slightly...
- of the
buccal capsule. It also has a pair of
subdorsal and a pair of
subventral teeth located close to the rear. Historically, the
European medicinal...
- stamens,
numerous free
carpels in a
single whorl, each with 1 ovule, and
subventral styles. The
fruit is an
achene with a
short beak. The
nineteenth century...
- sinuous;
siphuncle large,
subventral,
apparently orthochoantitic[clarification needed] with
tubular segments. The tubular,
subventral siphuncle separates Chidleyenoceras...
-
possessing short outer labial setae; its
short pharynx;
carrying anterior subventral teeth and a
posterior dorsal tooth in the same
stomal chamber; having...
- of the
buccal capsule. It also has a pair of
subdorsal and a pair of
subventral teeth located close to the rear.
Males are
usually 7–9 mm long, whereas...
- with a
small perforation in the center,
shallow dorsal impression, and
subventral tubular siphuncle with thin
connecting rings.
Chambers are very short...
-
elliptical transverse aperture,
without a
hyponomic sinus, and a small,
subventral siphuncle. The
phragmocone is
rapidly expanding and
strongly exogastric...
-
endogastric with the
ventral side
somewhat concave in profile. The
siphuncle is
subventral, empty, with
segments expanded into the
short but
broad chambers. Septa...
- The
aperture is
without a
hyponomic sinus. The
siphuncle is
small and
subventral.
Other Devonian Acleistoceratidae are Acleistoceras, Paracleistoceras...
