PBDB Taxon

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

Composita grandis

Rhynchonellata - Athyridida - Athyrididae

Taxonomy

Composita grandis was named by Cooper (1953). Its type specimen is USNM 115522 and is a 3D body fossil. Its type locality is USNM806r, Cerros de los Monos, El Antimonio, Sonora, which is in a Wordian marine limestone in the Antimonio Formation of Mexico.

Sister species lacking formal opinion data

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
1953	Composita grandis Cooper p. 56 figs. Pl 17, figs 1-18; pl 18l figs 1-10
1960	Composita grandis Coogan p. 296 figs. 22a-c

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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	grandis

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 grandis Cooper 1953

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Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	6	24.0	20.0	31.4	23.1	4.85

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: Wordian or 266.90000 to 264.28000 Ma

Collections (15 total)

Time interval	Ma	Country or state	Original ID and collection number
Roadian - Wordian	272.3 - 264.28	USA (California)	Composita grandis (105672)
Wordian	266.9 - 264.28	Mexico (Sonora)	Composita grandis (40810 40811 40813 40815 40816 40818 40820 40827 40828 40837 type locality: 40839 40844 40848 40850)