|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Actinopteri - Acanthuriformes - Acanthuridae
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.
|J. C. Tyler 2000||Unique among all acanthurids, both fossil and Recent, by two derived features: extensive hypurostegy, with the caudal-fin rays so broadly overlapping the hypural plate that their bases are separated by only a narrow horizontal space along the midline of the plate (versus hypurostegy absent or only very moderately developed); the first, second, and third interneural spaces vacant (versus only the second and third, or only the third, or none vacant).|