CATALOG OF ORIGINAL DESCRIPTIONS: Cyclampterium brachythorax 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 brachythorax
Other pages this level: C. brachythorax, C. leptetrum, C. longiventer, C. milowi, C. neatum, C. pegetrum, C. tanythorax

Cyclampterium brachythorax

Citation: Cyclampterium brachythorax Sanfilippo & Riedel 1970
Rank: species
Type specimens: pl.2, figs.15, 16
Type repository: Holotype, AMPH 6P, 18-20 cm.; USNM 167333, P52/0
Described on page(s) : p.457
Family (traditional): Theoperidae
Family (modern): Lophocyrtiidae

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Current identification:

Original Description
Shell moderately robust, approximately oblate-ellipsoidal in over-all form. Cephalis sub-spherical, poreless or with a few small pores. The thorax is broadly conical proximally, then expands rapidly and contracts distally, so that it is 1.5-2 times as broad as it is long. Thoracic pores are circular, regular, increasing in size distally from the slight collar stricture. Thoracic surface thorny. Abdomen rarely preserved, closed, ranging from a slightly convex cap to hemispherical, with pores similar in size to those of the thorax but less regular.

(Based on 16 specimens) length 220-310µm. Length of thorax 1 25-195µm, its maximum breadth 240-335µm. Distinguishing characters (rw): This species is distinguished from C.? tanythorax and C. ? neatum by the pronounced compression of the thorax along the axis of the shell.

Etymology: From the Greek brachys = short, and thorax.


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


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

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