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Isomicraster ✝

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Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	9569949	https://www.gbif.org/species/9569949
PaleoBioDB ID (PBDB)	33406	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=33406

Rank

genus

Taxonomy (GBIF)

Life : Animalia : Echinodermata : Echinoidea : Spatangoida : Micrasteridae : Isomicraster

Taxonomy (PBDB)

Life : Animalia : Echinodermata : Echinoidea : Spatangoida : Spatangidae : Isomicraster

Taxonomic Status (GBIF)

accepted

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Triploblastica	Lankester 1877
-	Nephrozoa	Jondelius et al. 2002
-	Deuterostomia	Grobben 1908
-	Ambulacraria
phylum	Echinodermata	Klein 1754
subphylum	Echinozoa	von Zittel 1895
class	Echinoidea
subclass	Euechinoidea	Bronn 1860
superorder	Acroechinoidea
-	Carinacea	Kroh and Smith 2010
-	Irregularia
-	Atelostomata	von Zittel 1879
order	Spatangoida	Agassiz 1840
suborder	Brissidina	Stockley et al. 2005
superfamily	Spatangidea	Fischer 1966
family	Spatangidae	Gray 1825
genus	Isomicraster

Scientific Name

Isomicraster

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Isomicraster	genus	belongs to Spatangidae	stated with evidence	Djabarov, 1964
Isomicraster	genus	belongs to Toxasteridae	stated without evidence	Fischer, 1966
Isomicraster	genus	belongs to Spatangoida	second hand	Sepkoski, 2002

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

93.9 - 89.8 Ma
Late/Upper Cretaceous

Last Recorded Appearance

83.5 - 70.6 Ma
Late/Upper Cretaceous

Environment

marine (based on Spatangoida)

Motility

slow-moving (based on Spatangoida)

Vision

limited (based on Echinoidea)

Diet

deposit feeder, detritivore (based on Spatangoida)

Reproduction

dispersal=water,planktonic (based on Spatangoida)

Ontogeny

accretion,addition of parts (based on Echinodermata)

Taphonomy

high Mg calcite (based on Spatangoida)

Primary Reference (PBDB)

J. J. Sepkoski, Jr. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560

Fossil Distribution

Subtaxa

Name	Status	Common Name(s)	Fossil Occurrences	Oldest	Youngest
Isomicraster babatakensis species	accepted (GBIF)	No associated record in PBDB
Isomicraster brueti species	accepted (GBIF)	No associated record in PBDB
Isomicraster campaniensis species	accepted (GBIF)	No associated record in PBDB
Isomicraster danei ✝ species	accepted (GBIF) listed (PBDB)		2	86.3 Ma Late/Upper Cretaceous	83.5 Ma Late/Upper Cretaceous
Isomicraster faasi species	accepted (GBIF)	No associated record in PBDB
Isomicraster gibbus ✝ species	listed (PBDB)		3	83.5 Ma Late/Upper Cretaceous	83.5 Ma Late/Upper Cretaceous
Isomicraster gregalis species	accepted (GBIF)	No associated record in PBDB
Isomicraster mexicanus species	accepted (GBIF)	No associated record in PBDB
Isomicraster rossi ✝ species	accepted (GBIF) listed (PBDB)		1	93.9 Ma Late/Upper Cretaceous	93.9 Ma Late/Upper Cretaceous

Synonymy List

Year	Name and Author
1964	Isomicraster Djabarov p. 62
1966	Isomicraster Fischer p. U554
2002	Isomicraster Sepkoski, Jr.

References

Sepkoski, Jr. J. J. (2002) A compendium of fossil marine animal genera, Bulletins of American Paleontology 363, 1-560

Djabarov G. N. (1964) , Verkhnemelovye Morskiy Ezhi Tsentral'nogo Kopet-Daga i ikh Stratigraficheskoe Znachenie, 1-114

Fischer A. G. (1966) Spatangoids, Treatise on Invertebrate Paleontology, Part U. Echinodermata. Geological Society of America and University of Kansas Press, Boulder and Lawrence 3 2, U543-U628

Smith, A.B. & Wright, C.W. 2012. British Cretaceous echinoids. Part 9, Atelostomata, 2. Spatangoida (2). Monographs of the Palaeontographical Society, 166/639, 635-754. - via World Register of Marine Species

GBIF/Yale University Peabody Museum: Peabody Invertebrate Paleontology DiGIR Service - via The Interim Register of Marine and Nonmarine Genera

Nomenclator Zoologicus (authority adjusted) - via The Interim Register of Marine and Nonmarine Genera

Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera

Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. Bulletins of American Paleontology. 363, 1-560. - via The Interim Register of Marine and Nonmarine Genera

WoRMS (Nov 2016). - via The Interim Register of Marine and Nonmarine Genera

in Grossouvre, Mém. Carte Géol. France, Rech. Craie sup., 1, 1901, fasc. 2 - via The Interim Register of Marine and Nonmarine Genera

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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