Describe the differences in internal morphology that can be seen between a Nautilus and Ammonite
in nautiloids septal necks are retrosiphonate (point towards the protoconch / centre OR away from the aperture)in ammonoids septal necks are mainly prosiphonate (point towards the aperture OR away from the protoconch / centre)
in nautiloids, the siphuncle is centralin ammonoids, the siphuncle is ventral (positioned towards the outer margin / marginal / towards the edge)
VG
Related Geology A Level answers
All answers ▸Describe and explain the nature of Igneous body A and explain the distribution of olivine and its significance?
What are the main differences between bivalves and brachiopods?
How does magma form?
What is the difference between a Normal Fault, a Reverse Fault, and a Strike-Slip Fault?