CATALOG OF ORIGINAL DESCRIPTIONS: Tholospyris devexa dusenburyi Goll 1973

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 devexa dusenburyi
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 devexa dusenburyi

Citation: Tholospyris devexa dusenburyi Goll 1973
Rank: sub-species
Type specimens: pl.12, figs.1-8
Type repository: Holotype: USNM 181852, Paratypes: USNM 181853, -54, U.S. National Museum, Washington, D.C.
Described on page(s) : p.453
Family (traditional): Trissocyclidae
Family (modern): Acanthodesmiidae

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Current identification:


Original Description
A subspecies of Tholospyris devexa characterized by symmetrical pairs of short lattice spines on the distal ends of lattice bars joined to the sagittal ring.
Sagittal ring subpolygonal, 58 to 68 microns high, 51 to 63 microns thick, joined directly to front and back of lattice shell. Complete specimens have a slender. apical connector bar and no apical or axial spines. A short vertical spine projects near the base of the sagittal ring. Short broad frontal spine. Single sculptured tubercle arising from base of sagittal ring at intersect with primary lateral processes. On some specimens, the only basal connector bars are primary lateral bars ; other specimens have primary lateral spines and no basal connector bars. A pair of short sagittal-ring spines projects from the front-base of the sagittal ring.
Basal ring oval, indented sagittally, 81 to 109 microns wide, 47 to 61 microns thick, enclosing two or four basal pores. Basal ring joined to front-middle and back-base of sagittal ring ; lattice bars joined to basal ring irregular in number and position. Lattice shell 102 to 132 microns wide, 84 to 150 microns high, surrounding apex and base of sagittal ring; slight horizontal constriction at basal ring. Broad lattice bars separate small, subrounded, lattice pores on the lateral portions of the lattice shell. Three pairs of very large, sagittal lattice pores are covered by thin, perforate, lattice plates. Portions of lattice shell surrounding apex and base of sagittal ring composed of delicate, smooth, lattice bars separating many small, subcircular lattice pores. Three tribladed lattice bars joined to middle and apex of sagittal ring. Some or all of these tribladed lattice bars and the front and back of the basal ring bear symmetrical pairs of short lattice spines. No frontal, vertical or sternal pores or lattice-shell tubercles. Distinguishing characters (rw): Representatives of Tholospyris devexa dusenburyi are distinguished from those of Tholospyris baconiana, Tricolospyris leibnitriana, Tholospyris procera and the type species of Tholospyris, T. cortinisca, by the presence of a pair of sagittal-ring spines at the front-base of the sagittal ring.

Etymology: In honor of Arthur N. Dusenbury, Jr., Assistant Editor of Micropaleontology.

Editors' Notes
Tholospyris devexa dusenburyi is a short-ranging subspecies, the scarce occurrence of which is restricted to the lower portion of the Matuyama Reversed Magnetic Series (Upper Pliocene).

References:

Goll, M. R. (1972b). Systematic of eight Tholospyris taxa (Trissocycylidae, Radiolaria). Micropaleontology. 8(4): 443-475. gs


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Tholospyris devexa dusenburyi compiled by the radiolaria@mikrotax project team viewed: 12-5-2021

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