CATALOG OF ORIGINAL DESCRIPTIONS: Trigonastrum regulare 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 -> T -> Trigonastrum -> Trigonastrum regulare
Other pages this level: T. regulare

Trigonastrum regulare

Citation: Trigonastrum regulare Haeckel 1887
Rank: species
Type specimens: pl.43, fig.16
Type repository: No information given
Described on page(s) : p.539
Family (traditional): Spongodiscidae
Family (modern): Euchitoniidae

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Current identification/main database link: Trigonastrum regulare Haeckel 1887

Original Description
All three arms equal and equidistant. Each arm has the form of an isosceles triangle, twice as high as broad, the truncated apex of which is inserted into the large circular central disk, whilst its distal base (four times as broad) is divided by a deep incision (half as long as the arm). Each arm with ten to twelve joints. Patagium between the arms nearly complete, spongy. (Differs from Chitonastrum triglochin mainly in the possession of a patagium.)

Radius of each arm 0.24, greatest breadth 0.11, basal breadth 0.03; length of the sides of the regular triangle 0.45.


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


Trigonastrum regulare compiled by the radiolaria@mikrotax project team viewed: 19-4-2021

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