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Megadesmus ✝

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Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	4586748	https://www.gbif.org/species/4586748
PaleoBioDB ID (PBDB)	18762	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=18762

Rank

genus

Taxonomy (GBIF)

Life : Animalia : Mollusca : Bivalvia : Megadesmidae : Megadesmus

Taxonomy (PBDB)

Life : Animalia : Mollusca : Bivalvia : Pholadomyida : Megadesmidae : Megadesmus

Taxonomic Status (GBIF)

accepted

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Bilateria
-	Eubilateria	Ax 1987
-	Protostomia	Grobben 1908
-	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca	Linnaeus 1758
class	Bivalvia	Linnaeus 1758
-	Eubivalvia	Carter 2011
subclass	Autobranchia
infraclass	Heteroconchia
-	Cardiomorphi	Ferussac 1822
-	Cardioni	Ferussac 1822
-	Cardiidia	Ferussac 1822
-	Poromyata	Ridewood 1903
order	Pholadomyida
superfamily	Edmondioidea
family	Megadesmidae	Vokes 1967
genus	Megadesmus	Sowerby 1838

Scientific Name

Megadesmus Sowerby, 1838

Name Published In

in Mitchell, Three Exped. Australia, 1

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Megadesmus	genus	belongs to Megadesmidae	stated with evidence	Morris et al., 1991
Megadesmus	genus	belongs to Pholadomyoida	second hand	Sepkoski, 2002

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

326 - 307 Ma
Carboniferous

Last Recorded Appearance

251 - 247 Ma
Early/Lower Triassic

Motility

facultatively mobile (based on Pholadomyida)

Vision

blind (based on Bivalvia)

Diet

suspension feeder (based on Pholadomyida)

Taphonomy

aragonite (based on Bivalvia)

Primary Reference (PBDB)

J. d. C. Sowerby. 1838. Fossils. In T.L. Mitchell (ed.), Three Expeditions into the Interior of Eastern Australia 1:14-15

Fossil Distribution

Subtaxa

Name	Status	Common Name(s)	Fossil Occurrences	Oldest	Youngest
Megadesmus (Cleobis) ✝ subgenus	listed (PBDB)		24	299 Ma Carboniferous	269 Ma Permian
Megadesmus (Megadesmus) ✝ subgenus	listed (PBDB)
Cardiomorpha gryphoides species	accepted (GBIF)	No associated record in PBDB
Cleobis robusta species	accepted (GBIF)	No associated record in PBDB
Edmondia nobilissima species	accepted (GBIF)	No associated record in PBDB
Megadesmus borealis ✝ species	accepted (GBIF) listed (PBDB)		2	279 Ma Permian	260 Ma Permian
Megadesmus deflatus ✝ species	accepted (GBIF) listed (PBDB)		3	279 Ma Permian	279 Ma Permian
Megadesmus dembskajae ✝ species	accepted (GBIF) listed (PBDB)		1	279 Ma Permian	279 Ma Permian
Megadesmus globlosus ✝ species	listed (PBDB)		2	296 Ma Permian	296 Ma Permian
Megadesmus globosus ✝ species	accepted (GBIF) listed (PBDB)		8	299 Ma Carboniferous	269 Ma Permian
Megadesmus gryphoides ✝ species	listed (PBDB)		12	296 Ma Permian	269 Ma Permian
Megadesmus nobilissimus ✝ species	listed (PBDB)
Megadesmus ovalis ✝ species	listed (PBDB)		1	272 Ma Permian	272 Ma Permian
Megadesmus pristinus ✝ species	accepted (GBIF) listed (PBDB)		4	299 Ma Carboniferous	296 Ma Permian
Megadesmus robusta ✝ species	listed (PBDB)		3	279 Ma Permian	265 Ma Permian
Megadesmus trigonalis ✝ species	listed (PBDB)		1	279 Ma Permian	279 Ma Permian
Notomya trigonalis species	accepted (GBIF)	No associated record in PBDB
Pachydomus ovalis species	accepted (GBIF)	No associated record in PBDB

Obsolete Names

Name	Source	Taxon Rank	Taxonomy
Pachydomus Morris, 1845	GBIF	genus	Animalia : Mollusca : Bivalvia : Megadesmidae : *Pachydomus*

Synonymy List

Year	Name and Author
1838	Megadesmus Sowerby p. 14
1991	Megadesmus Morris et al. p. 93
2002	Megadesmus Sepkoski, Jr.

References

Sowerby J. d. C. Fossils, Three Expeditions into the Interior of Eastern Australia 1, 14-15

Morris N. J., Dickins J. M., et al (1991) Upper Palaeozoic Anomalodesmatan Bivalvia, Bulletin of the British Museum of Natural History (Geology) 47 1, 51-100

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

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

SN2000: Brands, S. J. (compiler) 1989-2005. Systema Naturae 2000. Amsterdam, The Netherlands (2006 version). Available online at http://sn2000.taxonomy.nl/. - 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

SN2000/Runnegar, 1965 - via The Interim Register of Marine and Nonmarine Genera

in Mitchell, Three Exped. Australia, 1 - 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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