Classification: rads_cenozoic -> Spongodiscidae -> Euchitoniidae -> Myelastrum
Sister taxa: Amphicraspedum, Dictyocoryne, Myelastrum, Perichlamydium, Rhopalastrum, Spongaster, Tessarastrum
Daughter taxa: (blue => in age window 0-800Ma)
Myelastrum quadrifolium

neptune records:
Myelastrum trinibrachium

neptune records:
Myelastrum sp.

neptune records:


Citation: Myelastrum Haeckel 1881
Rank: genus
Basionym: Myelastrum
Taxonomic discussion: Has been assigned to Myelastridae, here assigned to Euchitoniidae following new classification being developed by Suzuki & co-workers

Catalog entries: Myelastrum

Original description: 3c. Tribus: Euchitonida. Porodiscida brachiata, brachiis cameratis in plano aequatoriali sitis et e margine disci radiantibus (saepe aculeis brachiorum terminalibus, saepe brachiis patagio vel vimento camerato conjunctis).
C. brachiis quatuor, ad formam crucis rectaugularis dispositis.
CII. brachiis dichotomis aut ramosis (sine patagio).
IIc. cruce quadricorni.

Translated description: 3c. Tribe: Euchitonida. Porodiscida with arms, the chambered arms being situated in the equatorial plane and radiating from the margin of the disk (often with terminal spines on the arms, and often with the arms Joined by a patagium or chambered web).
C. With four arms, arranged in the form of a rectangular cross.
CII. With the arms dichotomous or branched (without patagium).
IIc. Forming a cross with four horns. (Translated from Latin by E.M.R. and W.R.R.)]


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Gelasian Stage (0% up, 2.6Ma, in Gelasian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Haeckel, E. (1882). Entwurf eines Radiolarien-Systems auf Grund von Studien der Challenger-Radiolarien [Basis for a radiolarian classification from the study of Radiolaria of the Challenger collection]. Jenaische Zeitschrift für Naturwissenschaft. 15: 418-472. gs


Myelastrum compiled by the radiolaria@mikrotax project team viewed: 23-11-2020

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