PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Cidaris thouarsii

Echinoidea - Cidaroida - Cidaridae

Taxonomy

Cidaris thouarsii was named by Valencienncs (1846).

It was recombined as Cidaris (Eucidaris) thouarsii by Döderlein (1887); it was recombined as Eucidaris thouarsii by Grant and Hertlein (1938).

Subspecies

Eucidaris thouarsii galapagensis

Sister species lacking formal opinion data

C. alataeformis, C. anhaltina, C. bermudezi, C. frequens, C. gattungae, C. gladius, C. guiaensis, C. lanceolata, C. pretiosa, C. spendens, C. tehamensis, C. melitensis

Synonymy list

Year	Name and author
1846	Cidaris thouarsii Valencienncs
1887	Cidaris (Eucidaris) thouarsii Döderlein
1915	Cidaris thouarsii Clark and Twitchell p. 179
1920	Cidaris thouarsii Kew pp. 54 - 55
1938	Eucidaris thouarsii Grant and Hertlein p. 7

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
—	Ambulacraria
phylum	Echinodermata
subphylum	Eleutherozoa
—	Echinozoa	()

Rank	Name	Author
class	Echinoidea	()
subclass	Cidaroidea	(Claus 1880)
order	Cidaroida	()
superfamily	Cidaridea	Gray 1825
family	Cidaridae
genus	Cidaris	Leske 1778
species	thouarsii	Valencienncs 1846

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.

†Cidaris thouarsii Valencienncs 1846

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†Eucidaris thouarsii galapagensis Döderlein 1887

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Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

high Mg calciteo

Ontogeny:

accretion, addition of partsp

Environment:

marineo

Locomotion:

slow-movingo

Life habit:

low-level epifaunalo

Diet:

grazero

Diet 2:

omnivoreo

Vision:

limitedc

Dispersal:

watero

Dispersal 2:

planktonico

Created:

2004-02-28 12:08:25

Modified:

2009-12-13 03:42:21

Source: o = order, c = class, p = phylum

References: Aberhan 1992, Kiessling 2004

Age range: base of the Early/Lower Miocene to the top of the Late/Upper Pleistocene or 23.04000 to 0.01170 Ma

Collections (14 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Miocene	23.04 - 15.98	USA (California)	Eucidaris thouarsii (196138 196169)
Middle Miocene	15.98 - 11.63	Mexico	Cidaris thouarsii (133556)
Pliocene	5.333 - 2.58	USA (California)	Eucidaris thouarsii (203409)
Pliocene	5.333 - 2.58	Ecuador	Eucidaris thouarsii (96595)
Late/Upper Pleistocene (interglacial)	0.129 - 0.0117	Mexico (Baja California)	Eucidaris thouarsii (194405 194406 194407 194410 194420 194428 194429 194547)
Late/Upper Pleistocene	0.129 - 0.0117	Ecuador	Eucidaris thouarsii (96866)