PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Heterodiadema

Echinoidea - Pseudodiadematidae

Taxonomy

Heterodiadema was named by Cotteau (1864) [Sepkoski's age data: K Ceno K Camp]. It is the type genus of Heterodiadematidae.

It was assigned to Diadematidae by Clark and Twitchell (1915); to Hemicidaridae by Fell and Pawson (1966); to Heterodiadematidae by Smith (1995); to Hemicidaroida by Sepkoski (2002); and to Pseudodiadematidae by Berndt (2003).

Species

H. buhaysensis, H. libycum, H. ornatum

Species lacking formal opinion data

H. arrabidense, H. buhayensis, H. interjectum

Synonymy list

Year	Name and author
1864	Heterodiadema Cotteau
1915	Heterodiadema Clark and Twitchell p. 56
1966	Heterodiadema Fell and Pawson p. U384
1995	Heterodiadema Smith p. 133
2002	Heterodiadema Sepkoski
2003	Heterodiadema Berndt p. 78

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

Rank	Name	Author
—	Echinozoa	()
class	Echinoidea	()
subclass	Euechinoidea	Bronn 1860
superorder	Acroechinoidea	()
—	Carinacea
family	Pseudodiadematidae
genus	Heterodiadema	Cotteau 1864

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.

G. †Heterodiadema Cotteau 1864

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†Heterodiadema buhaysensis Smith 1995

†Heterodiadema libycum Agassiz and Desor 1846

†Heterodiadema ornatum Clark and Twitchell 1915

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

high Mg calcitec

Ontogeny:

accretion, addition of partsp

Environment:

marinep

Locomotion:

actively mobilec

Life habit:

epifaunalc

Diet:

grazerc

Diet 2:

deposit feederc

Vision:

limitedc

Dispersal:

waterp

Dispersal 2:

planktonicp

Created:

2004-02-28 12:05:24

Modified:

2010-02-12 04:00:29

Source: c = class, p = phylum

References: Aberhan 1992, Kiessling 2004

Age range: base of the Valanginian to the top of the Late/Upper Campanian or 137.05000 to 72.20000 Ma

Collections (31 total)

Time interval	Ma	Country or state	Original ID and collection number
Valanginian	137.05 - 132.6	Portugal	H. arrabidense (64952 65674 65675)
Late/Upper Albian	106.3 - 100.5	Portugal	H. interjectum (145815)
Late/Upper Albian - Cenomanian	106.3 - 93.9	Egypt	H. libycum (150677 150876)
Cenomanian	100.5 - 93.9	Saudi Arabia	H. lybicum (195496 195497 195499 195500 195501)
Cenomanian	100.5 - 93.9	Jordan	H. libycum (96246 96247 140949)
Early/Lower Cenomanian	100.5 - 93.9	Egypt	H. libycum (140114 140613)
Early/Lower Cenomanian - Middle Cenomanian	100.5 - 93.9	Egypt	H. libycum (114785 150675)
Late/Upper Cenomanian	100.5 - 93.9	Egypt	H. buhayensis (114795) H. libycum (114794 114809 114889 114891 140578 140581)
Late/Upper Cenomanian	100.5 - 93.9	Nigeria	H. libycum (4048 4055 210160)
Middle Cenomanian	100.5 - 93.9	Serbia	H. lybicum (164671)
Early/Lower Turonian	93.9 - 89.8	Egypt	H. libycum (140245)
Late/Upper Campanian	83.6 - 72.2	Saudi Arabia	H. lybicum (195503)