Daughter taxa (time control age-window is: 0-800Ma) | ||||
Periarachnium pauliani neptune records: | ||||
Periarachnium periplectum neptune records: |
Catalog entries: Periarachnium
Original description: 2a.Tribus: Sethocorida .Dyocyrtida aperta eradiata.
A. Sethocorida limbata = Lophophaenida. (Sethocorida margine ostii. laevi aut succiso).
AII. acuta (capitulo spinoso, non laevi).
IIb. secundo articulo conico, ostio nec coarctato nec dilatato.
b++ spinis capituli pluribus.
§4. secundo articulo spinis pallio arachnoideo incluso.
Translated description: 2a. Tribe: Sethocorida. Open eradiate dyocyrtids.
A. Sethocorida with a girdle = Lophophaenida (Sethocorida with a smooth or truncate apertural margin).
AII. Acute (with cephalis spiny, not smooth).
IIb. With the second segment conical and the aperture neither constricted nor dilated.
b++ With more than one cephalic spine.
§4. With the second segment enclosed by an arachnoidal mantle. (Translated from Latin by E.M.R. and W.R.R.)]
Geological Range:
Last occurrence (top): at top of (100% up, 0Ma, in "Holocene" stage). Data source: Total of ranges of the species in this database
First occurrence (base): within (-Ma, base in "Holocene" stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Periarachnium compiled by the radiolaria@mikrotax project team viewed: 20-9-2024
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