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Eurydesma cordatum

Bivalvia - Pectinida - Eurydesmatidae

Taxonomy
Eurydesma cordata was named by Morris (1845). It is the type species of Eurydesma.

It was corrected as Eurydesma cordatum by Etheridge and Dun (1910), Harrington (1955), Runnegar (1969), Runnegar (1970), Srikantia et al. (1978), Waterhouse (1988), Clarke (1992).

Sister species lacking formal opinion data
E. hobartense, E. hobartense, E. hobartensis, E. sacculum

Synonyms
Synonymy list
YearName and author
1845Eurydesma cordata Morris p. 276 figs. Pl 12
1847Eurydesma elliptica Dana p. 158
1847Eurydesma globosa Dana p. 158
1847Eurydesma cordata M'Coy p. 299
1847Pachydomus sacculus M'Coy p. 301 figs. Pl 14, fig 5
1849Eurydesma cordata Dana p. 700
1849Eurydesma elliptica Dana p. 700 figs. Pl 7, fig 6
1849Eurydesma globosa Dana p. 700
1849Eurydesma sacculus Dana p. 700 figs. Pl 7, fig 8
1910Eurydesma cordatum Etheridge Jr. and Dun p. 71 figs. Pl 17; pl 18, fig 1; pl 19, figs 35; pl 20, figs 2-5; pl 21, fig 1; pl 22, figs 3-5; pl 23, figs 1-4
1932Eurydesma globosum Reed p. 53 figs. Pl 10, figs 5,5a; pl 11, figs 4,4a
1955Eurydesma cordatum Harrington p. 122 figs. Pl 26, figs 2, 3
1956Eurydesma globosa Sahni and Srivastava p. 205 figs. Pl 34, figs 4,5
1969Eurydesma cordatum Runnegar pp. 279 - 280 figs. pl. 18 f. 9; pl. 19 f. 5-7
1970Eurydesma cordatum Runnegar p. 92 figs. Pl 13, figs 1-10; pl 14, figs 1-6; pl 16, fig 7; pl 17, figs 1-4
1978Eurydesma cordatum Srikantia et al. p. 74 figs. 2a-c
1983Eurydesma globosum Liu and Cui p. 86 figs. Pl 9, fig 8
1988Eurydesma cordatum Waterhouse p. 176 figs. Pl 4, figs 1-5; pl 5, fig 1
1992Eurydesma cordatum Clarke p. 34 figs. 19A,B, 20D, 21A

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
—Eubivalvia
subclassAutobranchia(Groblen 1894)
infraclassPteriomorphia(Beurlen 1944)
RankNameAuthor
—OstreomorphiFerussac 1822
—OstreioniFerussac 1822
—OstreataFerussac 1822
superorderOstreiformiiFerussac 1822
orderPectinida(Gray 1854)
suborderAnomiidinaGray 1854
—MonotoideiWaterhouse 2001
superfamilyEurydesmatoideaReed 1932
familyEurydesmatidae(Reed 1932)
genusEurydesma
speciescordatum()

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.

†Eurydesma cordatum Morris 1845
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Invalid names: Eurydesma elliptica Dana 1847 [synonym], Eurydesma globosa Dana 1847 [synonym], Pachydomus sacculus M'Coy 1847 [synonym]
Diagnosis
ReferenceDiagnosis
B. Runnegar 1969Relatively large and inflated species of Eurydesma having markedly thickened umbones, an obsolete byssal notch, and high, pointed and strongly inrolled beaks.
Measurements
partNmeanminimummaximummedians.d.
shell height886.138.0138.098.334.0
valve height1058.617.0121.290.141.7

Composition: low Mg calciteo
Composition 2: aragoniteo
Environment: marineo
Locomotion: stationaryo
Life habit: epifaunalo
Diet: suspension feedero
Vision: blindc
Created: 2007-09-07 02:56:05
Modified: 2009-12-13 03:22:38
Source: o = order, c = class
References: Aberhan et al. 2004, Kiessling 2004

Age range: base of the Asselian to the top of the Wordian or 298.90000 to 264.28000 Ma

Collections (54 total)


Time interval Ma Country or state Original ID and collection number
Asselian298.9 - 293.52India Eurydesma globosa (116802)
Asselian298.9 - 293.52Pakistan Eurydesma cordatum (116446)
Permian298.9 - 251.902India (Himachal Pradesh) Eurydesma cordatum (46394)
Sakmarian293.52 - 290.1China (Xizang) Eurydesma globosum (97289)
Sakmarian293.52 - 290.1Argentina Eurydesma cordatum (91638)
Sakmarian293.52 - 290.1India (Kashmir) Eurydesma globosum (86536) Pachydomus sacculus (86545)
Sakmarian293.52 - 290.1Australia (New South Wales) Eurydesma cordata (133750) Eurydesma cordatum (101575 133744 144835 144837 144838 144851 144853 144877 144878 144896 144897 214494 214495 214497) Eurydesma globosa, Eurydesma elliptica, Eurydesma cordata, Eurydesma sacculus (119250) Isocardia sp. (120458)
Sakmarian293.52 - 290.1Australia (Queensland) Eurydesma playfordi (58079 58080)
Sakmarian293.52 - 290.1Australia (Tasmania) Eurydesma cordatum (105476 105488 105493 105499 144834)
Sakmarian - Artinskian293.52 - 283.3Australia (Queensland) Eurydesma cordatum (144892 144893)
Sakmarian - Artinskian293.52 - 283.3Australia (New South Wales) Eurydesma cordatum (144882 144883)
Artinskian290.1 - 283.3Australia (New South Wales) Eurydesma cordatum (132483 144852 144880 144884 144885 144886 144887 144888 144889 144890 144891)
Artinskian290.1 - 283.3Australia (Queensland) Eurydesma cordatum (66207 66208 66209 66210 66215 66218 66219)
Wordian266.9 - 264.28Australia (New South Wales) Pachydomus sacculus (133342)