CATALOG OF ORIGINAL DESCRIPTIONS: Semantrum tetrastoma Haeckel 1887

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.

Higher levels: rads_cat -> S -> Semantrum -> Semantrum tetrastoma
Other pages this level: S. buetschlii, S. quadrifore, S. signarium, S. sphragisma, S. tetrapylum, S. tetrastoma

Semantrum tetrastoma

Citation: Semantrum tetrastoma Haeckel 1887
Rank: species
Type specimens: pl.92, fig.3
Type repository: No information given
Described on page(s) : p.959
Family (traditional): Trissocyclidae
Family (modern): Trissocyclidae

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Current identification:

Original Description
Sagittal ring semicircular, thorny, without edges. Basal ring tetragonal or nearly cordate, with a small anterior and a large posterior bow-shaped incision; on the lateral edges with numerous irregular thorns. Jugular gates pear-shaped. Cardinal gates nearly kidney-shaped.

Height of the sagittal ring 0.1 to 0.14, breadth 0.07 to 0.09.

Editors' Notes
Stratigraphic information for LM21 from Riedel, 1959, p.287.


Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gs

Riedel, W. R. (1959). Oligocene and Lower Miocene Radiolaria in tropical Pacific sediments. Micropaleontology. 5(3): 285-302. gs


Semantrum tetrastoma compiled by the radiolaria@mikrotax project team viewed: 4-3-2021

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