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Placatenellidae (sand dollar)

Echinoidea - Clypeasteroida - Placatenellidae

Taxonomy
Placatenellidae was named by Mooi et al. (2018). Its type is Placatenella.

It was assigned to Scutelliformes by Mooi et al. (2018).

Subtaxa
Camachoaster, Placatenella (type genus)

Synonymy list
YearName and author
2018Placatenellidae Mooi et al.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEleutherozoa
Echinozoa()
classEchinoidea()
subclassEuechinoideaBronn 1860
RankNameAuthor
superorderAcroechinoidea()
Carinacea
Irregularia()
Microstomata
Neognathostomata
orderClypeasteroida
suborderScutellina()
infraorderScutelliformes
familyPlacatenellidae
familyPlacatenellidae

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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G. †Camachoaster Mooi et al. 2018
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Camachoaster maquedensis Mooi et al. 2018
G. †Placatenella Mooi et al. 2018
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Diagnosis
ReferenceDiagnosis
R. Mooi et al. 2018Scutelline 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