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Hardouinia aequorea

Echinoidea - Cassiduloida

Taxonomy
Cassidulus aequoreus was named by Morton (1834). It is a 3D body fossil. Its type locality is Prairie Bluff (Morton collection), which is in a Maastrichtian carbonate chalk in the Prairie Bluff Formation of Alabama.

It was recombined as Hardouinia aequorea by Cooke (1953).

Synonyms
Synonymy list
YearName and author
1834Cassidulus aequoreus Morton
1909Cassidulus intermedius Slocom
1915Cassidulus aequoreus Clark and Twitchell p. 75
1915Cassidulus intermedius Clark and Twitchell p. 79
1953Hardouinia aequorea Cooke p. 22 figs. Pl 8, figs 15-22

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
subphylumEleutherozoa
—Echinozoa()
classEchinoidea()
RankNameAuthor
subclassEuechinoideaBronn 1860
superorderAcroechinoidea()
—Carinacea
—Irregularia()
—Microstomata
—Neognathostomata
orderCassiduloida
genusHardouinia()
speciesaequorea(Morton 1834)

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.

†Hardouinia aequorea Morton 1834
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Invalid names: Cassidulus intermedius Slocom 1909 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: high Mg calciteo
Ontogeny: accretion, addition of partsp
Environment: marinep
Locomotion: slow-movingo
Life habit: semi-infaunalo
Diet: detritivoreo
Vision: limitedc
Dispersal: waterp
Dispersal 2: planktonicp
Created: 2004-02-28 17:48:53
Modified: 2009-10-08 14:57:31
Source: o = order, c = class, p = phylum
References: Aberhan et al. 2004, Kiessling 2004, Aberhan 1992

Age range: base of the Late/Upper Maastrichtian to the top of the Thanetian or 70.60000 to 56.00000 Ma

Collections (8 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Maastrichtian70.6 - 66.0USA (Mississippi) Hardouinia aequorea (4105 4113)
Late/Upper Maastrichtian70.6 - 66.0USA (Mississippi) Hardouinia aequorea (4160)
Late/Upper Maastrichtian70.6 - 66.0USA (Alabama) Cassidulus aequoreus (123411) Hardouinia aequorea (4203 4205 197246)
Thanetian59.2 - 56.0USA (New Jersey) Cassidulus aequoreus (3113)