radiolaria - rads_cenozoic - Botryostrobus parsonsae radiolaria - rads_cenozoic - Botryostrobus parsonsae

Botryostrobus parsonsae

Classification: rads_cenozoic -> Artostrobiidae -> Botryostrobus -> Botryostrobus parsonsae
Sister taxa: B. aquilonaris, B. auritus, B. bramlettei, B. hollisi, B. joides, B. kerguelensis, B. miralestensis, B. parsonsae, B. rednosus, B. sp.


Citation: Botryostrobus parsonsae Hollis 1997
Rank: species
Basionym: Botryostrobus parsonsae Hollis 1997
1991 Botryostrobus? sp. A - Hollis plate 10, figures 11-15
1997 Botryostrobus? parsonsae - Hollis pl. 13, figs. 13-15

Catalog entries: Botryostrobus parsonsae

Original description: Narrowly conical test of five medially-inflated segments, very rarely six segments. Ovate cephalis with very small apical horn and lateral directed vertical tube; external expression of vertical tube is usually a large pore on the side of the cephalis, but in well-preserved specimens a tubular structure extends down from the area of the pore to the third or fourth segment, following the contour of the test. Surface of the cephalis otherwise imperforate or dimpled. Thorax hemispherical, imperforate or sparsely perforate; surface simply dimpled or with four rows of occluded pores, quincuncially arranged in regular hexagonal frames. Single row of open pores at collar and lumbar strictures. Abdomen and subsequent segment medially inflated, separated by rounded constrictions, and increase regularly in size. Pores on these segments usually occluded, occasional patches of small, circular, open pores; quincuncially arranged in 4-8 rows, set in regular hexagonal frames; 7-10 rows on final segment. Constrictions between post thoracic segments have 2-3 transverse rows of open, unframed pores. Final segment terminates with 1-2 rows of open pores, framed or unframed, above slightly constricted thickened peristome.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Danian Stage (61.61-66.04Ma, top in Danian stage). Data source:
First occurrence (base): within Danian Stage (61.61-66.04Ma, base in Danian stage). Data source:

Plot of occurrence data:


Hollis, C. J. (1991). Latest Cretaceous to Late Paleocene Radiolaria from Marlborough (New Zealand) and DSDP Site 208. Thesis, University of Auckland. 1-308. gs

Hollis, C. J. (1997). Cretaceous-Paleocene Radiolaria from eastern Marlborough, New Zealand. Institute of Geological & Nuclear Sciences, Monograph. 17: 1-152. gs


Botryostrobus parsonsae compiled by the radiolaria@mikrotax project team viewed: 30-11-2023

Taxon Search:
Advanced Search

Short stables page link: Go to to create a permanent copy of this page - citation notes

Add Comment

* Required information
Captcha Image
Powered by Commentics


No comments yet. Be the first!