Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
![]() | ![]() | ![]() | ![]() | Siphostichartus corona neptune records: 949 |
![]() | Siphostichartus praecorona neptune records: 18 | |||
Siphostichartus sp. neptune records: 2 |
Catalog entries: Siphostichartus
Original description: Artostrobiid having four segments, ovate to spindle-shaped; mouth constricted, no terminal feet; vertical tube flared (duck-billed *) ; apical horn present.
*In ""duck-billed"" vertical tube opening is, in fact, circular and the ""duck-bill"" effect is produced by additional skeletal material on the outer edge of the tube.
Geological Range:
Last occurrence (top): at top of Piacenzian Stage (100% up, 2.6Ma, in Piacenzian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Aquitanian Stage (0% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Nigrini, C. A. (1977). Tropical Cenozoic Artostrobiidae (Radiolaria). Micropaleontology. 23(3): 241-269. gsReferences:
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Siphostichartus compiled by the radiolaria@mikrotax project team viewed: 3-10-2023
Short stables page link: https://mikrotax.org/radiolaria/index.php?id=205411 Go to Archive.is to create a permanent copy of this page - citation notes |