Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
| Phormacantha hystrix neptune records: 2 | ||||
| Phormacantha sp. neptune records: 15 | ||||
Catalog entries: Phormacantha
Original description: Has the same four primary spines and the same three primary arches as Plectacantha. There is, however, also a ventral, sagittal spine, which is less strongly developed than the others (""der secundäre Mittelstachel Jørgensen, 1900, p. 77). The network, as in Plectacantha, is at a late stage and only imperfectly closed beneath.
Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
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Phormacantha compiled by the radiolaria@mikrotax project team viewed: 13-7-2026
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