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Placoganoidei (disused)
Taxonomy
Placoganoidei was named as an order. It is extant.
It was reranked as the suborder Placoganoidei by Owen (1859).
It was assigned to Ganoidei by Owen (1859); and to Ganoidei by Leidy (1873).
It was reranked as the suborder Placoganoidei by Owen (1859).
It was assigned to Ganoidei by Owen (1859); and to Ganoidei by Leidy (1873).
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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.
Or. Placoganoidei
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Owen 1859 | Endo-skeleton cartilaginous, or retaining the notochord; head and more or less of the trunk protected by large ganoid, often reticulated, plates; heterocercal. |