radiolaria - rads_cenozoic - Calocycletta robusta radiolaria - rads_cenozoic - Calocycletta robusta

Calocycletta robusta


Classification: rads_cenozoic -> Pterocorythidae -> Calocycletta -> Calocycletta robusta
Sister taxa: C. acanthocephala, C. anekathen, C. caepa, C. cladara, C. costata, C. parva, C. robusta, C. serrata, C. virginis, C. sp.

Taxonomy

Citation: Calocycletta robusta Moore 1971
Taxonomic rank: species
Basionym: Calocycletta robusta
Synonyms:
1972 Calocyletta robusta - Moore plate 10, figure 6

From Suzuki Paleotax db:

1971 Calocycletta robusta n. sp. Moore p. 743-744, pl. 10, figs. 5, 6
1972 Calocycletta robusta Moore Johnson & Parker pl. 3, fig. 3
1972 Calocycletta robusta Moore Moore p. 148, pl. 1, fig. 6
1973 Calocycletta robusta Moore Dinkelman p. 788, pl. 7, fig. 4
1974 Calocycletta robusta Moore Johnson p. 550
1975 Calocycletta robusta Moore Ling p. 730, pl. 12, fig. 12
1977 Calocycletta robusta Moore Riedel & Sanfilippo pl. 16, fig. 10
1978 Calocycletta robusta Moore Theyer et al. pl. 2, fig. 17
1978 Calocycletta robusta Moore group Riedel & Sanfilippo p. 66, pl. 3, figs. 10, 11
1982 Calocycletta robusta Moore Riedel & Sanfilippo pl. 2, fig. 5
1984 Calocycletta robusta Moore Nigrini & Lombari N157-N158, pl. 28, fig. 3
1985 Calocycletta robusta Moore Sanfilippo et al. fig. 28.4
1986 Calocycletta robusta Moore Levyikina p. 72, pl. 2, figs. 1, 2, 6, 7
1992 Calocycletta (Calocycletta) robusta Moore Sanfilippo & Riedel pl. 1, fig. 6
1995 Calocycletta (Calocycletta) robusta Moore Sanfilippo & Nigrini p. 272, 275, pl. 2, figs. 2, 3
2006 Calocycletta (Calocycletta) robusta Moore Nigrini et al. p. 28, pl. P5, fig. 6
Taxonomic discussion: Moore 1971 p 743-744 pl 10 figs 5, 6; Moore 1995 p 211

Catalog entries: Calocycletta robusta

Original description: Stout conical apical horn which envelopes or nearly envelopes an ovate, lobed cephalis. Cephalis has very sparse subcircular pores. Thorax robust and hemispherical to subspherical in shape. Rough surface of the thorax contains circular, hexagonally arranged pores with a tendency towards longitudinal alignment. Lumbar stricture usually not marked externally (except in early forms). Abdomen tapers distally and contains subcircular pores which are strongly longitudinally aligned. Abdominal termination usually ragged, but may end in irregular lamellar and tapering feet in the later forms.
Remarks on original description: Early forms of C. robusta have a nearly hemispherical thorax, a cylindrical shape in the region of the lumbar stricture, and an abdomen that tapers distally. Later forms have a subspherical thorax that gives rise smoothly to the uniform taper of the abdomen at or slightly above the lumbar stricture.
prominent constituent of assemblages from latitudes lower than 40 degrees

Description


Published descriptions


Moore 1972 - Calocyletta robusta

Description: Stout conical apical horn which envelops or nearly envelops an ovate, lobed cephalis. Cephalis with very sparse subcircular pores. Thorax robust and hemispherical to subspherical in shape. Rough surface of the thorax pierced by circular, hexagonally arrangedpores with a tendency toward longitudinal alignment. Lumbar stricture usually not marked externally except in early forms. Abdomen tapering distally and pierced by subcircular pores which are strongly longitudinally aligned. Abdominal termination usually ragged, but may be irregular with lamellar and tapering feet in the later forms. Early forms of C. robusta (Moore, MS., pl. 7, fig. 4a) have a nearly hemispherical thorax, a cylindrical shape in the region of the lumbar stricture, and an abdomen that tapers distally. Later forms (plate 1, figure 6; Moore, MS., pl. 7, fig. 4b) have a subspherical thorax that gives rise smoothly to the uniform taper ofthe abdomen at or slightly above the lumbar stricture.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:

References:

Moore, T. C. Jr. (1971). Radiolaria. Initial Reports of the Deep Sea Drilling Project. 8: 727-774. gs

Moore, T. C. Jr. (1972). Mid-Tertiary evolution of the radiolarian genus Calocycletta. Micropaleontology. 18(2): 144-152. gs

Moore, T. C. (1995b). Radiolarian stratigraphy, Leg 138. Proceedings of the Ocean Drilling Program, Scientific Results. 138: 191-232. gs


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Calocycletta robusta compiled by the radiolaria@mikrotax project team viewed: 14-2-2025

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