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Echinoidea - Cassiduloida - Cassidulidae

Synonymy list
YearName and author
1801Cassidulus Lamarck p. 348
1846Nucleolites (Cassidulus) Forbes p. 162
1915Cassidulus Clark and Twitchell p. 74
1938Cassidulus Grant and Hertlein p. 107
1942Cassidulus Cooke p. 30
1966Cassidulus Kier p. U514
1968Cassidulus Nisiyama p. 8
2002Cassidulus Sepkoski, Jr.
2009Cassidulus Smith pp.

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subclassEuechinoideaBronn 1860

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.

A. B. Smith 2009Test small, low, elongate oval; broader posteriorly, base more or less flat; Apical system anterior; monobasal with four gonopores; Petals moderately developed, straight, the two poriferous zones of the same petal usually unequal in length; Ambulacra plates beyond petals single pored; Periproct supramarginal, subrounded, with short groove on subanal ledge extending from periproct to posterior margin; Peristome pentagonal, transverse, anterior, with vertical-walled entrance; Bourrelets confined to vertical sides of peristome, basicoronal plates short, very slightly inflated at outer edge; Phyllodes single pored, with slight crowding of pores, one or two occluded pores in some ambulacra but for the most part forming a single series widening slightly towards the peristome; Three or four sphaeridial pits perradially in phyllodes and partially enclosed; Buccal pores present; Adorally tubercles much larger, scrobicules often polygonal, with bosses eccentric anteriorly; adorally, naked, pitted area in interambulacrum 5, ambulacrum III
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: Kiessling 2004, Aberhan et al. 2004, Aberhan 1992

Age range

Maximum range based only on fossils: base of the Maastrichtian to the top of the Hemphillian or 72.10000 to 4.90000 Ma
Minimum age of oldest fossil (stem group age): 66.0 Ma

Collections (28 total)

Time interval Ma Country or state Original ID and collection number
Maastrichtian72.1 - 66.0USA (California) C. mercedensis (185457 185494 185622 185628 185632 185636)
Danian66.0 - 61.6Denmark C. faberi (89866)
Selandian61.6 - 59.2Nigeria C. kieri (7791)
Lutetian47.8 - 41.3Egypt C. sp. (41904)
Priabonian38.0 - 33.9Germany (Bavaria) C. scutella (10963)
Priabonian38.0 - 33.9USA (Florida) C. ericsoni, C. globosus (41475) C. globosus, C. ericsoni (61109)
Late/Upper Eocene37.2 - 33.9USA (Florida) Casidulus trojanensis (204637)
Late/Upper Eocene37.2 - 33.9USA (Georgia) C. sp. (57926) C. trojanensis (204638 204639)
Late/Upper Eocene37.2 - 33.9Colombia C. sp. (103544)
Early/Lower Oligocene33.9 - 28.4USA (Georgia) C. gouldii (203474)
Early/Lower Oligocene33.9 - 28.4USA (Florida) C. gouldii (61122 61123)
Early/Lower Oligocene33.9 - 28.4USA (Alabama) C. alabamensis (203475)
Rupelian33.9 - 28.1USA (Georgia) C. gouldii (155967 155968 155969)
Late/Upper Oligocene28.4 - 23.03Cuba C. rojasi (155859)
Early/Lower Miocene23.03 - 15.97Brazil C. sp. (112581)
Early/Lower Miocene23.03 - 15.97Brazil (Para) C. sp. (58454)
Hemphillian10.3 - 4.9USA (Alabama) C. gouldii (89608)