CATALOG OF ORIGINAL DESCRIPTIONS: Tholospyris gephyristes Hülsemann 1963

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 -> T -> Tholospyris -> Tholospyris gephyristes
Other pages this level: T. baconiana spinula, T. baconiana variabilis, T. caudata, T. cupola, T. devexa, T. devexa dusenburyi, T. devexa finalis, T. fenestrata, T. fornicata, T. galeata, T. gephyristes, T. infericosta, T. procera, T. ramosa, T. spinosus, T. tautessares, T. tripodiscus

Tholospyris gephyristes

Citation: Tholospyris gephyristes Hülsemann 1963
Rank: species
Type specimens: figs.14,15a,b
Type repository: No catalog number, U.S. National Museum, Washington, D.C.
Described on page(s) : p.24
Family (traditional): Plagiacanthidae
Family (modern): Sethoperidae

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Current identification/main database link: Tholospyris gephyristes Hülsemann 1963

Original Description
The shell consists of a bilocular cephalis with unequal, rounded pores and a small, fenestrated conical cupola which is prolonged into an apical spine. Three basal feet are prolongations of the dorsal and the paired lateral spines of the inner skeleton. Between their proximal portions a small amount of lattice-work connecting the spines may be present. From the lower part of the sagittal ring, where it is incorporated in the shell wall, arises a small vertical spine. There is a spine in the sagittal constriction on the dorsal side right below the cupola, like an elongation of the sagittal ring to the dorsal side. Another spine arises above the sagittal constriction on the ventral side; this spine does not originate in the constriction, but from a columella bridging the shallow groove. Haeckel (1887) shows a similar slender, bridge-like columella on the ventral side of T. tripodiscus (Pl. 89, Fig. 1), but no spine originates from there. Further, the insignificant cupola and small size of the new species, which is only about one-third of T. tripodiscus, distinguish the two species.

(Based on 2 specimens) Height of sagittal ring 0.032, 0.035µm.; length of cephalis 0.044, 0.047µm.


Huelsemann, K. (1963). Radiolaria in plankton from the Arctic Drifting Station T-3, including the description of three new species. Arctic Institute of North America, Technical Paper. 13: 1-52. gs


Tholospyris gephyristes compiled by the radiolaria@mikrotax project team viewed: 19-4-2021

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