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Grammoceras
Taxonomy
Grammoceras was named as a genus. It is not extant.
It was reranked as Arieticeras (Grammoceras) by Gemmellaro (1885); it was reranked as Harpoceras (Grammoceras) by Thevenin (1908).
It was assigned to Arieticeras by Gemmellaro (1885); to Harpoceras by Thevenin (1908); to Ammonoidea by Sepkoski (2002); and to Grammoceratinae by Howarth (2013).
It was reranked as Arieticeras (Grammoceras) by Gemmellaro (1885); it was reranked as Harpoceras (Grammoceras) by Thevenin (1908).
It was assigned to Arieticeras by Gemmellaro (1885); to Harpoceras by Thevenin (1908); to Ammonoidea by Sepkoski (2002); and to Grammoceratinae by Howarth (2013).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Grammoceras
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†Grammoceras normanianum d'Orbigny 1900
†Grammoceras penestriatulum Buckman 1902
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Invalid names: Costigrammoceras costigerum Buckman 1926 [synonym]
†Grammoceras striatulum Sowerby 1825
†Grammoceras thouarsense d'Orbigny 1844
†Grammoceras timorense Krumbeck 1923
Invalid names: Costigrammoceras Buckman 1926 [synonym]
Diagnosis
No diagnoses are available