PBDB Taxon

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

Composita crassa

Rhynchonellata - Athyridida - Athyrididae

Taxonomy

Composita crassa was named by Cooper and Grant (1976). Its type specimen is USNM 153009g, a shell (Articulated shell), and it is not a trace fossil.

Sister species lacking formal opinion data

C. ambigua, C. ambigua, C. bellula, C. caimaensis, C. ficoidea, C. gibbosa, C. humilis, C. immatura, C. lateralis, C. megala, C. oblonga, C. ptygmation, C. salve, C. struniensis, C. trilobata

Synonymy list

Year	Name and author
1976	Composita crassa Cooper and Grant p. 2149 figs. Pl 655, figs 1-39

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
—	Lophophorata
—	Panbrachiopoda	Carlson and Cohen 2020
phylum	Brachiopoda	Cuvier 1805

Rank	Name	Author
subphylum	Rhynchonelliformea	Williams et al. 1996
class	Rhynchonellata	Williams et al. 1996
order	Athyridida	Boucot et al. 1964
suborder	Athyrididina	Boucot et al. 1964
superfamily	Athyridoidea	McCoy 1844
family	Athyrididae	McCoy 1841
subfamily	Spirigerellinae
genus	Composita	Brown 1849
species	crassa

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.

†Composita crassa Cooper and Grant 1976

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Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	49	7.14	1.20	22.2	7.50	6.54

Composition:

low Mg calcitep

Environment:

marineuc

Locomotion:

stationarysubo

Attached:

yesp

Life habit:

low-level epifaunalsubo

Diet:

suspension feedersubo

Vision:

blindc

Created:

2018-11-10 18:06:04

Modified:

2018-11-10 18:06:04

Source: subo = suborder, c = class, p = phylum, uc = unranked clade

References: Aberhan et al. 2004, Nesnidal et al. 2013

Age range: base of the Kungurian to the top of the Roadian or 283.30000 to 266.90000 Ma

Collections (35 total)

Time interval	Ma	Country or state	Original ID and collection number
Kungurian	283.3 - 274.4	USA (Texas)	Composita crassa (43492 43513 43514 43517 44564 81644 81954 105744 106286)
Roadian	274.4 - 266.9	USA (Texas)	Composita crassa (43512 43518 43554 43563 43598 43613 44242 81640 81671 101781 101782 101783 101793 101805 102603 102604 102611 102615 102616 105742 105743 105805 105807 105814 105838 105873)