PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Acrotreta gemma

Lingulata - Acrotretida - Acrotretidae

Taxonomy

Acrotreta gemma was named by Billings (1865).

Sister species lacking formal opinion data

A. aequatorialis, A. attica, A. dissimilis, A. eucharis, A. fenxiangensis, A. grandis, A. inchoans, A. korinevskii, A. maior, A. minima, A. minima, A. multa, A. orientalis, A. sabrinae, A. sulcata, A. foetida

Synonymy list

Year	Name and author
1865	Acrotreta gemma Billings p. 216 figs. figs. 201a, f
1884	Acrotreta gemma Walcott pp. 17 - 18 figs. Plate i, figs, la, If, Id-f; plate ix, figs. 9, 9a
1902	Acrotreta gemma Walcott p. 585

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
—	Lophophorata
—	Panbrachiopoda	Carlson and Cohen 2020

Rank	Name	Author
phylum	Brachiopoda	Cuvier 1805
subphylum	Linguliformea	Williams et al. 1996
class	Lingulata	Gorjansky and Popov 1985
order	Acrotretida	Kuhn 1949
superfamily	Acrotretoidea
family	Acrotretidae	Schuchert 1893
genus	Acrotreta	Kutorga 1848
species	gemma	Billings 1865

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.

†Acrotreta gemma Billings 1865

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Diagnosis

No diagnoses are available