| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Polarasterias
Taxonomy
Polarasterias was named by Rousseau et al. (2018). Its type is Polarasterias janusensis.
It was assigned to Asteriidae by Rousseau et al. (2018).
It was assigned to Asteriidae by Rousseau et al. (2018).
Species
P. janusensis (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2018 | Polarasterias Rousseau et al. p. 5 |
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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. †Polarasterias Rousseau et al. 2018
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†Polarasterias janusensis Rousseau et al. 2018
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Rousseau et al. 2018 | Asteriid with elongated arms, small disc, very broad ambulacral grooves with narrow ambulacrals and weakly developed or absent actinals. Abactinals cruciform, numerous, forming a rectilinear grid arranged in regular transverse rows of seven or more plates on each side of the arm. Tube feet strongly quadriserial. |