CATALOG OF ORIGINAL DESCRIPTIONS: Amphirhopalum bigeminum 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 -> A -> Amphirhopalum -> Amphirhopalum bigeminum
Other pages this level: A. amphidicranum, A. bifidum, A. bigeminum, A. echinatum, A. omalocladum, A. praeypsilon, A. ximorphum, A. ypsilon

Amphirhopalum bigeminum

Citation: Amphirhopalum bigeminum Haeckel 1887
Rank: species
Type repository: No information given
Described on page(s) : p.522
Family (traditional): Spongodiscidae

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Current identification:

Original Description
Both arms equal, in the proximal larger half simple, in the distal smaller half forked; each branch triangular, with a strong conical terminal spine. Axis of the branches straight. (Resembles Dicranastrum cornutum, Pl. 45, fig. 2, but without lateral arms.)

Radius of the arms (without spines) 150µm, basal breadth 30µm ; breadth of the bifurcation 80µm.

Editors' Notes
There was no illustration of this species in Haeckel (1887)
For Amphirrhopalum read Amphirhopalum. For Amphirrhopella read Amphirhopella.

Haeckel listed Amphirhopalum bigeminum under the subgeneric name Amphirhopella, but did not include the subgeneric name in the species name.


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


Amphirhopalum bigeminum compiled by the radiolaria@mikrotax project team viewed: 4-3-2021

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