Spongurus pylomaticus


Classification: rads_cenozoic -> Spongodiscidae -> Sponguridae -> Spongurus -> Spongurus pylomaticus
Sister taxa: S. bilobatus, S. cauleti, S. cylindricus, S. pylomaticus, S. quadratus, S. spatulaeformis, S. sp.

Taxonomy

Citation: Spongurus pylomaticus Riedel 1958
Rank: species
Basionym: Spongurus pylomaticus
Taxonomic discussion: Riedel 1958

Catalog entries: Spongurus pylomaticus

Original description: Shell subcylindrical or elongate ellipsoidal, approximately twice as long as broad. An inner, densely spongy core is surrounded by a narrow mantle of less dense meshwork. Entire surface usually sparsely covered with bristle-like spines, which in many specimens tend to be longer at the two poles of the main axis. At one pole is a pylome, usually surrounded by short, irregular teeth.

(based on 29 specimens) Length 150-255 µm, breadth 78-125 µm. Length of surface spines 5-40 µm (usually broken off). Distinguishing characters (rw): his species differs from all others of the genus in the presence of a pylome
Remarks on original description: As indicated by Haeckel (1887, 343-345), the genus Spongurus is apparently cosmopolitan, this species, the only pylomatic member of the genus, has not been found anywhere but in the Antarctic, where it occurs in both the American and Indian Ocean sectors.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"

Plot of occurrence data:

References:

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


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Spongurus pylomaticus compiled by the radiolaria@mikrotax project team viewed: 24-11-2020

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