Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Placatenellidae (sand dollar)
Taxonomy
Placatenellidae was named by Mooi et al. (2018). Its type is Placatenella.
It was assigned to Scutelliformes by Mooi et al. (2018).
It was assigned to Scutelliformes by Mooi et al. (2018).
Subtaxa
Camachoaster, Placatenella (type genus)
Synonymy list
Year | Name and author |
---|---|
2018 | Placatenellidae Mooi et al. |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
Fm. †Placatenellidae Mooi et al. 2018 [sand dollar]
show all | hide all
Diagnosis
Reference | Diagnosis | |
---|---|---|
R. Mooi et al. 2018 | Scutelline sand dollars with a slight to very pronounced posterior notch; paired oral interambulacra continuous; first postbasicoronal plates in paired oral interambulacra greatly elongated along the interradius, at least four times longer than wide and at least two to three times the length of any other postbasicoronal in the paired columns |