CATALOG OF ORIGINAL DESCRIPTIONS: Cyclampterium tanythorax Sanfilippo & Riedel 1970

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 -> C -> Cyclampterium -> Cyclampterium tanythorax
Other pages this level: C. brachythorax, C. leptetrum, C. longiventer, C. milowi, C. neatum, C. pegetrum, C. tanythorax

Cyclampterium tanythorax

Citation: Cyclampterium tanythorax Sanfilippo & Riedel 1970
Rank: species
Type specimens: pl.2, figs.13-14
Type repository: Holotype, DODO 39P, 328-330 cm.: USNM 167344, E53/0
Described on page(s) : p.457
Family (traditional): Theoperidae
Family (modern): Lophocyrtiidae

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Current identification:

Original Description
Shell robust, subspherical to subellipsoidal in general form. Cephalis subspherical, poreless or with a few small pores, commonly with a short apical horn. Collar stricture pronounced. Thorax inflated, thick-walled. with rather regular circular pores increasing in size away from the collar stricture, and a thorny surface. Abdomen thick-walled, with subcircular pores less regular than those of the thorax, always closed distally, ranging in form from a slightly convex cap to inflated, more than hemispherical. There are no feet, but in some specimens a few short, irregularly scattered subterminal spines.

(Based on 1 5 specimens) Total length 290-380µm. Length of thorax 185-235µm, its maximum breadth 240-290µm. Distinguishing characters (rw): This species is distinguished from C. ? leptetrum by the greater dimensions of the thorax, thorny rather than nodose surface of the thorax, and more regular lattice-work of the abdomen, which is closed in all specimens in which it is preserved. The thorax is not compressed as it is in C. ? brachythorax.
It is practically impossible to distinguish between this species and C. ? brachythorax unless specimens can be viewed perpendicularly to the axis of the shell. In the cases of some of the samples examined, insufficient material was available to permit making special preparations to orient the specimens, and this accounts for the doubtful occurrences of these two species indicated in the tables.

Etymology: From the Greek tany = long, and thorax


Sanfilippo, A. & Riedel, W. R. (1970). Post-Eocene "closed" theoperid radiolarians. Micropaleontology. 16(4): 446-462. gs


Cyclampterium tanythorax compiled by the radiolaria@mikrotax project team viewed: 24-2-2021

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