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Protogrammoceras (Matteiceras) geometricum (Phillips 1829)

Protogrammoceras geometricum a l'é na spece ëd Cephalopoda ant la famija Hildoceratidae.

L'EdV a l'ha dij dàit për un atribù:

Body symmetry
- URI: http://eol.org/schema/terms/body_symmetry
- Definission: overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
smon-e tute j'argistrassion
bilaterally symmetric
- URI: http://purl.obolibrary.org/obo/PATO_0001324
- Definission: being symmetric about a plane running from frontal end to caudal end (head to tail), and having nearly identical right and left halves
smon-e tute j'argistrassion