| 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. |
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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.
Fm. †Placatenellidae Mooi et al. 2018 [sand dollar]
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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 |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum | |||||
| References: Aberhan 1992, Kiessling 2004, Aberhan et al. 2004 | |||||
Age range: base of the Early/Lower Miocene to the top of the Serravallian or 23.03000 to 11.62000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Miocene | Brazil | Abertella complanata (112581) | |
| Early/Lower Miocene | Brazil (Para) | Abertella complanata (112590) | |
| Early/Lower Miocene | Argentina (Santa Cruz) | Camachoaster maquedensis (193976) | |
| Langhian - Serravallian | Brazil (Para) | Abertella complanata (58454) |