radiolaria - rads_cenozoic - Androcyclas <title>radiolaria - rads_cenozoic - Androcyclas


Classification: rads_cenozoic -> Pterocorythidae -> Pterocorythidae inc sed -> Androcyclas
Sister taxa: Androcyclas, Lithopilium
Daughter taxa (time control age-window is: 0-800Ma)
Androcyclas gamphonycha

neptune records: 24
Androcyclas sp.

neptune records: 1


Citation: Androcyclas Jørgensen 1905
Rank: genus
Basionym: Androcyclas

Catalog entries: Androcyclas

Original description: The four primary spines and the ventral sagittal one are present. The apical spine, D, runs close to the cephalic wall, and finally protrudes as a marginal topsword, thick and large, and furnished with three broad edges. There is, consequently, no distinct columella. The three basal spines, A, Lr and Ll protrude from the upper part of the thorax (the spine A lowest down) like fine needles, which pierce the wall, no part of them being enclosed in it as ""thoracic ribs"". The ventral, sagittal spine also protrudes like a similar needle in the region of the neck. There is also a long, inner axial spine, which reaches as far down as to the upper part of the abdomen.

Cfr. the remarks about the region of the neck, under the description of the species
Translated description: Androcyclas gamphonycha (Jorgensen) in Jorgensen, 190].
Remarks on original description: I referred the following species [Androcyclas gamphonycha (Jørgensen) in Jørgensen, 1905] previously to the genus Pterocorys Haeckel, but I now find it necessary to separate it from this genus which has strong side swords on the thorax. On the other hand, there is probably no doubt that the genus Theoconus Haeckel to some extent corresponds to my genus Androcyclas. Thus, Theocorys jovis Haeckel (1887a, pl. 69, fig. 4) is undoubtedly of quite the same structure as Androcyclas gamphonycha, the byspines on the abdomen of the latter only excepted. As, however, Haeckel’s group Theocyrtida, to which Theoconus Haeckel and Theocamptra Haeckel belong, is defined as Tricyrtida without radial apophyses, I have thought it most practical, to avoid confusion, temporarily to erect the new genus Androcyclas.




Biogeography and Palaeobiology

Similar species

Geographic distribution


Phylogenetic relations

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Total of range of species in this database
First occurrence (base): at base of Gelasian Stage (0% up, 2.6Ma, in Piacenzian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Jørgensen, E (1905). The protist plankton and diatoms in bottom samples: Radiolaria. In, Nordgaard (ed.) Hydrographical and biological investigation in Norwegian Fjord. 49-151. gs O


Androcyclas compiled by the radiolaria@mikrotax project team viewed: 27-1-2023

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