CATALOG OF ORIGINAL DESCRIPTIONS: Arachnocorys trifida 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 -> Arachnocorys -> Arachnocorys trifida
Other pages this level: A. arachnodiscus, A. araneosa, A. circumtexta, A. discoides, A. dubius, A. enneaptera, A. fimbria, A. hexaptera, A. pentacantha, A. polyptera, A. simplex, A. trifida, A. umbellifera

Arachnocorys trifida

Citation: Arachnocorys trifida Haeckel 1887
Rank: species
Type locality: LM25
Type age (chronostrat): [presumably Quaternary though some forms reported from this station appear to be Tertiary]
Type repository: No information given
Described on page(s) : p.1267

<% linkedspecs %>

Current identification:

Original Description
Cephalis large, campanulate, with irregular, roundish pores and numerous ramified spines; in the centre of the top a larger pyramidal oblique horn of twice the length. Thorax cap-shaped, flatly vaulted, with nine strong convex ribs, prolonged into slender free feet. Three of these nine ribs are the centrifugal prolongations of the three cortinar bars (united in the centre of the collar stricture, separating its three large cortinar meshes); the other six are diverging lateral branches of the former, arising in pairs at both sides of its base. All nine ribs are connected by delicate arachnoidal network with irregular polygonal meshes. From its surface arise thin bristles, and from the base of each main rib a stout, perpendicular branch. All these dorsal spines are connected by irregular, arachnoidal wicker-work, covering thorax and cephalis. (A remarkable primitive species ?)

Size: Cephalis 0.05 long, 0.06 broad; thorax 0.07 long, 0.18 broad.

Editors' Notes
There was no illustration of this species in Haeckel (1887)
Haeckel listed Arachnocorys trifida under the subgeneric name Arachnocoronium, but did not include the subgeneric name in the species name.[comment from RadWorld database]


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


Arachnocorys trifida compiled by the radiolaria@mikrotax project team viewed: 18-4-2021

Taxon Search:
Advanced Search

Short stable page link: Go to to create a permanent copy of this page - citation notes

Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
Captcha Image
Powered by Commentics