radiolaria - rads_cat - Dictyophimus mawsoni

radiolaria - rads_cat - Dictyophimus mawsoni radiolaria - rads_cat - Dictyophimus mawsoni

CATALOG OF ORIGINAL DESCRIPTIONS: Dictyophimus mawsoni Riedel 1958

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 -> D -> Dictyophimus -> Dictyophimus mawsoni

Other pages this level: << < D. constrictus, D. cortina, D. craticula, D. crisiae, D. elegans, D. gracilipes, D. hertwigii, D. histricosus, D. hueyi, D. infabricatus, D. kiwi, D. larus, D. lasanum, D. longicollum, D. longipes, D. mawsoni, D. multispinus, D. okadai, D. plactonis, D. platycephalus, D. plectaniscus, D. pocillum, D. procerus, D. pyramis, D. robustus, D. sphaerocephalus, D. splendens, D. tethyis, D. tetracanthus, D. tripus, D. triserratus

Dictyophimus mawsoni Riedel 1958.jpg

Dictyophimus mawsoni

Citation: Dictyophimus mawsoni Riedel 1958

Taxonomic rank: species

Described on page(s) : p.234

Type specimens: pl.3, figs.6, 7

Type repository: Holotype from the B.A.N.Z.A.R.E. collections, Adelaide University, Australia.

Family (traditional): Theoperidae

Family (modern): Lychnocaniidae

Current identification/main database link: Lamprotripus mawsoni (Riedel) Petrushevskaya&Kozlova 1972

Original Description

Shell large, of heavy construction, spiny, generally subhemispherical in form. Cephalis cap-like, with subcircular pores and short, acute, thorn-like spines scattered over its surface. Apical horn stout, cylindro-conical, vertical or oblique. Collar stricture indistinct. Thorax subhemispherical with large subcircular or subangular pores separated by heavy intervening bars from which arise numerous acute, conical spines. Three ribs, which in some specimens are not distinct, extend along the entire length of the thoracic wall and terminate in three sub-parallel or divergent, stout, cylindro-conical feet. At the collar region, three spines extend inward from the shell-wall, but do not connect with each other; these apparently represent all that remains of the reduced internal spicular skeleton.

Size:

(based on 11 specimens) Length of apical horn 113-166 µm, of cephalis 33-40 µm, of thorax 125-175 µm, of feet 100-187 µm. Breadth of cephalis 53-76 µm, of thorax 196-225 µm.

Etymology:

This species is named for Sir Douglas Mawson, leader of the B.A.N.Z.A.R.E.. Expedition and my teacher, mentor and friend, who was responsible for my deciding to study the Radiolaria.

Extra details from original publication

Distinguishing characters: This species is distinguished from all others of the genus Dictyophimus by the combination of characters: heavy construction, spiny surface, long and stout apical horn, and subhemispherical thorax. Although the number of observed specimens is less than that desirable for the description of a new species, the naming of this species seems justifiable because of the apparent constancy of the skeletal structure, and the distinct differences between this and other described species.

Editors' Notes

Apart from its occurrence in the B.A.N.Z.A.R.E. sediments, D. mawsoni has been found in no other locality except the far northern Pacific. It is thus apparently a bipolar cold-water species.

References:

Riedel, W. R. (1958). Radiolaria in Antarctic sediments. B.A.N.Z. Antarctic Research Expedition Reports. 6(10): 217-255. gs

Dictyophimus mawsoni compiled by the radiolaria@mikrotax project team viewed: 13-8-2026

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