arrayname: original 
radiolaria - rads_cat - Cassideus mariae radiolaria - rads_cat - Cassideus mariae

CATALOG OF ORIGINAL DESCRIPTIONS: Cassideus mariae Nishimura 1992

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 -> Cassideus -> Cassideus mariae
Other pages this level: C. mariae

Cassideus mariae

Citation: Cassideus mariae Nishimura 1992
Taxonomic rank: species
Described on page(s) : p.333
Type specimens: pl.4, figs.1-3
Type repository: Holotype n° LMMN AN0007-5, and paratype n° LMMN AN0007-4.Laboratory of the Microfossil's study of Matsumoto, Nagano, Japan.
Family (traditional): Theoperidae
Family (modern): Neosciadiocapsidae

Current identification/main database link: Cassideus mariae Nishimura 1992


Original Description

Cephalis small, subspherical, penetrated by small pores bearing two stout three-bladed horns (apical and vertical). Collar stricture with four collar pores internally, slightly defined externally. Cephalic structure has A, V, two L and D. Two L and D extend to thoracic internal wall as ribs. Thorax large, conical, hat-shaped with smooth surface; pores circular or subcircular, regular in size and arrangement. These pores become gradually larger distally. Internally is a thin thoracic velum. Abdomen (?) flat, rounded, with regularly arranged circular pores.

Size:
(Based on 15 specimens) Maximum width of cephalis 25-30 µ, of thorax 60-136 µ, of abdomen 80-240 µ.

Etymology:
for Dr. Maria G. Petrushevskaya in honor of her manifold contributions to Cenozoic radiolarian studies.

Extra details from original publication
Distinguishing characters: This species differs from Cassideus riedeli (Pessagno 1969, p. 395, pl. 25, figs. 1-8; pl. 27, fig. 1) in lacking the numerous concentric ridges. This species is similar to Cassideus yoloensis (Pessagno 1969, p. 396, pl. 25, figs. 9-12; pl. 26, figs. 1-3), but distinguished from the latter by its small cephalis and by usually lacking a distinct ridge in the slope of the proximal portion of the thorax, and by having larger and less numerous pores.

References:

Nishimura, A. (1992). Paleocene radiolarian biostratigraphy in the northeast Atlantic at Site 384, Leg 43, of the Deep Sea Drilling Project. Micropaleontology. 38(4): 317-362. gs


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Cassideus mariae compiled by the radiolaria@mikrotax project team viewed: 23-4-2025

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