radiolaria - rads_cenozoic - Anthocyrtella callopisma

radiolaria - rads_cenozoic - Anthocyrtella callopisma radiolaria - rads_cenozoic - Anthocyrtella callopisma

Anthocyrtella callopisma

Classification: rads_cenozoic -> Theoperidae -> Anthocyrtidae -> Anthocyrtella -> Anthocyrtella callopisma
Sister taxa: A. anthemis, A. callopisma, A. furcata, A. mespilus, A. spatiosa

rad_org Anthocyrtella (Q) callopisma, img1989.jpg
rad_org Anthocyrtella (Q) callopisma, img1868.jpg
rad_org Anthocyrtella (Q) callopisma, img1869.jpg

Taxonomy

Citation: Anthocyrtella callopisma Caulet 1986

Taxonomic rank: species

Basionym: Anthocyrtella callopisma

Synonyms:
1975 Anthocyrtella sp. A - Petrushevskaya Pl. 15, Fig. 2; Pl. 16, Fig. 5
1986 Anthocyrtella (?) callopisma - Caulet p.227

From Suzuki Paleotax db:

1986 Anthocyrtella (?) callopisma n. sp. Caulet p. 227, pl. 1, figs. 1, 2
1995 Anthocyrtella (?) callopisma Caulet Morley & Nigrini p. 81, pl. 3, fig. 3

Catalog entries: Anthocyrtella callopisma

Type images:

type image: A. callopisma

Original description: Cephalis subglobose, with small pores. Fundamental spicule reduced to bars separating four collar pores. Apical spine thin, vertical. Vertical spine, oblique, very short. No axobate. Collar stricture slightly marked by a progressive change in external contour. Shell conical, consisting of four segments, separated by inner rings. Thorax truncate-conical, spiny, with thin walls perforated by circular pores of irregular size. About 8-10 pores on a half-circumference. Abdomen truncate-conical with longitudinal ribs and spines. A total of 8-10 subcircular pores on a half-circumference. Pores increase in size distally. Fourth segment with indistinct termination, truncate-conical. Large pores of irregular shape and increasing distally. One or two ribs prolonged outward as thin acicular feet of the same length as the fourth segment.

Description

Published descriptions

Petrushevskaya 1975 - Anthocyrtella callopisma

The first three segments are porous and the pores are very large, often irregular in the fourth segment. Some longitudinal ribs may be seen in the walls of the fourth segment. The first segment is the narrowest, the fourth is the broadest. All the segments are separated from one another by the inner ring and the external constriction. Not very abundant but rather typical in the Antarctic Miocene. Some specimens with undeveloped fourth segment (which has very small pores) also occur (Plate 15, Figures 4, 5).

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested.
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Anthocyrtella callopisma, synonyms included - Anthocyrtella (?) callopisma; Anthocyrtella callopisma;
See also space-time plot :: Samples map :: Parent: Anthocyrtella

References:

Petrushevskaya, M. G. (1975a). Cenozoic radiolarians of the Antarctic, Leg 29, DSDP. Initial Reports of the Deep Sea Drilling Project. 29: 541-675. gs O

Missing or ambiguous references: Caulet 1986; ; ; ; ; ;

Anthocyrtella callopisma compiled by the radiolaria@mikrotax project team viewed: 15-8-2026

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=203153 Go to Archive.is to create a permanent copy of this page - citation notes

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