Stratigraphy
Era:
System:
Series:
Stage:
Substage:
Site and situation
City:
Site:

Identification
Rostrum - ventral view
Rostrum - lateral view
Lateral symmetry
Shape at maximum cross section
Shape apical cross section
Shape alveolar cross section
Apex type
Rostrum surface
Lateral lines or grooves
Apical grooves
Rostrum size
Relative length alveolar groove

 
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