Cycladophora golli


Classification: rads_cenozoic -> Theoperidae -> Theopilidae -> Cycladophora -> Cycladophora golli
Sister taxa: C. antiqua, C. bicornis, C. cabrilloensis, C. campanula, C. conica, C. cosma, C. davisiana, C. golli, C. humerus, C. pliocenica, C. robusta, C. sakaii, C. spongothorax, C. tetracantha, C. sp.
Daughter taxa (time control age-window is: 0-800Ma)
Cycladophora golli golli

neptune records: 22
Cycladophora golli regipileus

neptune records: 97

Taxonomy

Citation: Cycladophora golli (Chen) Lombari and Lazarus 1988
Rank: species
Basionym: Lophocyrtis golli
Taxonomic discussion: (Chen)1975 p.461 pl.12 figs.4,5 as Lophocyrtis; Lombari and Lazarus 1988 p.124 pl.11

Catalog entries: Lophocyrtis golli

Original description: Cephalis hemispherical, with small, circular pores, bearing two three-bladed spines; apical spine twice length of cephalis; vertical spine short. Thorax conical in the upper part, inflated conical or conical in the lower part, with a distinct change in contour. Thoracic pores circular to subcircular, and arranged in transverse rows; pore sizes increasing slightly, with a marked change in size at place where change in contour occurs. Abdomen cylindrical or slightly dilated cylindrical, wider than thorax, separated from the thorax by a distinct change in contour, with 2-4 rows of circular to subcircular pores of uniform dimension. Shell closed by a sieve plate.
(Dimensions: Based on 30 specimens from 266-18-3, 51-53cm.; 266-17-4, 50-52cm.; and 266-15-3, 50-52 cm.) Length of shell (excluding apical horn) 103-131µm. Maximum width of abdomen 102-113µm. Distinguishing characters (rw): This species differs from Lophocyrtis regipileus Chen, n. sp., in having a more delicate thoracic wall and a wider abdomen, from Theocalyptra bicornis (Popofsky) in having an abdomen of more cylindrical shape.

Description

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:

References:

Chen, P. H. (1975). Antarctic Radiolaria. Initial Reports of the Deep Sea Drilling Project. 28: 437-513. gs

Lombari, G. & Lazarus, D. (1988). Neogene cycladophorid radiolarians from North Atlantic, Antarctic, and North Pacific deep-sea sediments. Micropaleontology. 34(2): 97-135. gs


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Cycladophora golli compiled by the radiolaria@mikrotax project team viewed: 18-4-2021

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=203761 Go to Archive.is to create a permanent copy of this page - citation notes



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