- of
certain ammonite s**** of the same species, the
larger s**** (the
macroconch)
being female, and the
smaller s**** (the microconch)
being male. This...
-
macroconchs.
Microconch and
macroconch variations,
presumed male and
female respectively, also
differ in
their apertures. The
aperture of
macroconch Duashnoceras...
-
belonging to this
genus were
probably microconchs of Catacoeloceras. As
macroconch of M.
mucronatus is
considered to be
Catacoeloceras raquinianum. Ammonites...
-
oblique ventrolateral clavi. Usually, ribs are
zigzagging through venter.
Macroconchs have a
smooth body
chamber and
rounded venter. Currently,
there is confusion...
-
dimorphism in
their size.
While microconchs reach 16–62 mm in diameter,
macroconchs s****
width is 85–200 mm. They are
moderately involute,
compressed and...
-
Macrochons can be 4, to 6
times larger than microconchs. As an example,
macroconchs of
Pseudolioceras are more than 150mm in diameter,
while adult microconchs...
- an
average height of 180 mm (7.1 in);
while the
larger female adults (
macroconchs) had the
average height of 270 mm (11 in).
Didymoceras nebrascense was...
- into
prominent and
moderately sharp secondary ribs. The
aperture of the
macroconch has a
broad ventral collar preceded by a constriction. That of the microconch...
- with ****. This is
largely reflected in the s****, with some
specimens (
macroconchs)
being distinctly larger in size than the
others (microconchs). In the...
-
sloping sides. The
aperture is circular. The
fossils come in two sizes, the
macroconch (female)
ranging in size from 95 to 175
millimetres (3.7 to 6.9 in) in...
