radiolaria - rads_cat - Arachnocorallium cerebellum radiolaria - rads_cat - Arachnocorallium cerebellum

CATALOG OF ORIGINAL DESCRIPTIONS: Arachnocorallium cerebellum Renaudie & Lazarus 2015

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 -> Arachnocorallium -> Arachnocorallium cerebellum
Other pages this level: A. cerebellum, A. pyroensis, A. stilla

Arachnocorallium cerebellum

Citation: Arachnocorallium cerebellum Renaudie & Lazarus 2015
Taxonomic rank: species
Described on page(s) : 192
Type specimens: ECO-056, circle 2
Type sample (& lithostrat): 120-751A-4H-4, 98–102cm
Type age (chronostrat): Early Pliocene
Type locality: ODP Site 751, Kerguelen Plateau, Southern Ocean
Type repository: Museum für Naturkunde Berlin
Family (traditional): Plagiacanthidae
Family (modern): Lophophaenidae

Current identification/main database link: Arachnocorallium cerebellum Renaudie & Lazarus 2015


Original Description

Description

Shell consists only in a cephalis which is in two distinct parts: a large, spherical, almost globular upper part that bears regularly arranged, relatively large circular pores and whose wall is rough and crested and a more or less conical, narrow lower part with a few large circular pores and a rather smooth wall. Spine A is embedded in the wall of the lower and the upper part and eventually, in some specimens, protrudes as a fairly long conical spine (Pl. 5, fig. 2). Spines D, Ll and Lr are rather strong, relatively long and bifurcate distally. Ax can be seen near the junction of MB, Ll and Lr as a triangular dent on MB. Several supplementary thin, long, conical horns can also be present subapically.
Remarks

It differs from Peridium sphaerum Funakawa, 1995b in the presence of the long by-spines and in the robustness, length and shape of the basal spines. It is also distinguishable from the specimen illustrated in Petrushevskaya (1971) as Lophophaeninae gen. sp. cf. Micromelissa coarctata Rüst, 1888 by its size, its numerous, larger pores and the additional spines being confined to the apical part of the cephalis. Psilomelissa? sp. A Hollis, 2002 is lacking an apical horn, has longer, tribladed D, Ll and Lr spines and lacks the basal constriction of the cephalic chamber.


Size:
(Based on 6 specimens.) Total length (excluding spines): 80–105 µm (94)

Etymology:
Named after the resemblance of the specimen illustrated in Plate 5, fig. 1 to a brain (from the Latin cere­ bellum, ‘small brain’)

References:


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Arachnocorallium cerebellum compiled by the radiolaria@mikrotax project team viewed: 14-9-2026

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=262947 Go to Archive.is to create a permanent copy of this page - citation notes



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