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Grypoceras quadrangulum
Taxonomy
Nautilus quadrangulus was named by Beyrich (1866).
It was recombined as Grypoceras quadrangulum by Parnes (1986) and Pérez-Valera et al. (2017).
It was recombined as Grypoceras quadrangulum by Parnes (1986) and Pérez-Valera et al. (2017).
Subspecies
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1866 | Nautilus quadrangulus Beyrich p. 671 |
| 1882 | Nautilus quadrangulus von Mojsisovics |
| 1986 | Grypoceras quadrangulum Parnes |
| 2017 | Grypoceras quadrangulum Pérez-Valera et al. p. 179 fig. 6 |
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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.
†Grypoceras quadrangulum Beyrich 1866
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†Nautilus quadrangulus brahmanicus Griesbach 1880
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Diagnosis
No diagnoses are available