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Helicelasma
Taxonomy
Helicelasma was named by Neuman (1969). Its type is Helicelasma simplex.
It was assigned to Streptelasmatidae by Neuman (1969) and Elias (1981); and to Rugosa by Sepkoski (2002).
It was assigned to Streptelasmatidae by Neuman (1969) and Elias (1981); and to Rugosa by Sepkoski (2002).
Species
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. †Helicelasma Neuman 1969
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†Helicelasma fossulatum Wang 1948
†Helicelasma giganteum Kaljo 1958
†Helicelasma randi Elias 1981
†Helicelasma rusticum Billings 1858
†Helicelasma simplex Neuman 1969
†Helicelasma whittardi Smith 1930
Diagnosis
No diagnoses are available