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Heteroschisma

Blastoidea - Fissiculata - Phaenoschismatidae

Discussion

Redefined by A. Bremier and D. B. Macurda,Jr.,1972

Taxonomy
Heteroschisma was named by Wachsmuth (1883) [Sepkoski's age data: D Eife-l D Give Sepkoski's reference number: 2]. It is not extant.

It was assigned to Codasteridae by Fay and Wanner (1967); to Phaenoschismatidae by Macurda (1983); and to Fissiculata by Sepkoski (2002).

Species
H. alternatum, H. alternatus, H. canadense, H. subtruncatus
Species lacking formal opinion data
H. canadensis

Synonymy list
YearName and author
1883Heteroschisma Wachsmuth p. 352
1967Heteroschisma Fay and Wanner pp. S408-S409 figs. 248 3a, 3b
1983Heteroschisma Macurda
2002Heteroschisma Sepkoski

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumBlastozoa
classBlastoideaSay 1825
orderFissiculataJaekel 1918
familyPhaenoschismatidaeEtheridge and Carpenter 1886
genusHeteroschismaWachsmuth 1883

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. †Heteroschisma Wachsmuth 1883
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†Heteroschisma canadense Billings 1869
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: high Mg calcitep
Ontogeny: accretion, addition of partsp
Environment: marinep
Locomotion: stationaryc
Attached: yesc
Life habit: intermediate-level epifaunalc
Diet: suspension feederc
Vision: blindc
Dispersal: waterp
Dispersal 2: planktonicp
Created: 2009-12-09 05:26:13
Modified: 2009-12-09 07:26:53
Source: o = order, c = class, p = phylum
References: Aberhan 1992, Aberhan et al. 2004, Whittington et al. 1997

Age range: base of the Southwoodian to the top of the Givetian or 393.47000 to 382.31000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Southwoodian393.47 - 387.95USA (Indiana) Codaster alternatus (230505)
Southwoodian393.47 - 387.95USA (Kentucky) H. alternatum (230506)
Givetian387.95 - 382.31USA (New York) H. canadensis (5659)