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Hymeniastrum

Polycystinea - Spumellaria - Spongodiscidae

Taxonomy
Hymeniastrum was named by Ehrenberg (1847) [Sepkoski's age data: J u R]. It is extant. Its type is Hymeniastrum pythagorae. It was considered unknown by Ehrenberg (1847).

It was assigned to Spongodiscidae by Ehrenberg (1847); and to Spumellaria by Sepkoski (2002).

Species
H. ancora, H. pythagorae (type species)
Species lacking formal opinion data
H. euclidis
Entered
by J. Sepkoski on 2003-01-23; modified by B. Allen on 2024-03-22

Synonymy list
YearName and author
1847Hymeniastrum Ehrenberg
2002Hymeniastrum Sepkoski

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RankNameAuthor
kingdomChromistaCavalier-Smith 1981
subkingdomRhizaria()
superphylumRetariaCavalier-Smith 1999
phylumRadiozoa
superclassPolycystinia
RankNameAuthor
classPolycystinea
orderSpumellariaEhrenberg 1875
familySpongodiscidaeHaeckel 1862
genusHymeniastrum

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. Hymeniastrum Ehrenberg 1847
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†Hymeniastrum ancora Rüst 1898
Hymeniastrum pythagorae Ehrenberg 1854
Diagnosis
ReferenceDiagnosis
C. G. Ehrenberg 1847Small, disc-shaped body, median part nucleate, with a sometimes wide or concentrically cellular margin. (Mixed) Median chamber wide and nucleate, margin delicate with concentric rows or irregular spongy. Lobate or radiate. Radii joined at the base by a cellular membrane
Measurements
No measurements are available
No ecological data are available

Age range

Maximum range based only on fossils: base of the Early/Lower Tithonian to the top of the Pleistocene or 149.20000 to 0.01170 Ma
Minimum age of oldest fossil (stem group age): 145.06 Ma

Collections (35 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Tithonian149.2 - 145.06Italy H. ancora (47167)
Miocene23.04 - 5.333North Pacific H. euclidis (248443)
Pliocene5.333 - 2.58North Pacific H. euclidis (251005 251006 251007) H. sp. (262436)
Pleistocene2.58 - 0.0117North Pacific H. euclidis (248425 253647 264871) H. sp. (264864 264865)
Actinocyclus oculatus2.0 - 1.1North Pacific H. euclidis (250536)
NN191.9 - 0.42North Pacific H. euclidis (252898 252908)
NN200.42 - 0.29North Pacific H. euclidis (257521 257522 257523 257524 257526 259778)
NN210.29 - 0.0North Pacific H. euclidis (252891 257511 257512 257513 257514 257515 257517 257520 259772 259774 259775 259776 259777 266882 266883)