Nannotax3 - ntax_Farinacci - Pseudotriquetrorhabdulus

CATALOG - Pseudotriquetrorhabdulus

Folder trail: ntax_Farinacci -> P -> Pseudotriquetrorhabdulus
Folders this level: << < Pontosphaera, Poricalyptra, Poritectolithus, Porsildia, Praenoelaerhabdus, Praeprinsius, Prediscosphaera, Prinsiosphaera, Prinsius, Proculithus, Prolatipatella, Pseudoconus, Pseudoemiliania, Pseudolithraphidites, Pseudomicula, Pseudotriquetrorhabdulus, Pseudowigwamma, Pseudozygrhablithus, Psyktosphaera, Pyrobolella, Pyrocyclus, Pyxolithus

Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
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Current identification/main database link: Blackites Hay & Towe, 1962

Compiled data

Citation: Pseudotriquetrorhabdulus Wise & Constans 1976
Rank: Genus
Type species: Triquetrorhabdulus inversus Bukry & Bramlette, 1969
Language: EN
Farinacci catalog page (& compiler): 11178
Current citation: Blackites Hay & Towe, 1962

Original Description



Extra details from original publication

Editors' Notes
Synonym: Wiseorhabdus Bukry 1981 (this was based on the same holotype as the genus Pseudotriquetrorhabdulus and so is an objective junior synonym)

Current status: The genus was originally compared with Neogene Triquetrorhabdulus due to the presence of ‘keels' but it is now thought to represent disarticulated rhabdolith spines, hence the genus has been included in the Rhabdosphaeraceae. Bown & Newsam (2017) recombined P. inversus in Blackites, making the genus superfluous

See also: Triquetrorhabdulus inversus - type species;Wiseorhabdus - alternative name;


Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs O

Wise, S. W. & Constans, R. E. (1976). Mid Eocene plankton correlations Northern Italy - Jamaica W.I. Transactions of the Gulf-Coast Association of Geological Societies. 26: 144-155. gs V O


Pseudotriquetrorhabdulus: Catalog entry compiled by Anna Farinacci. Viewed: 7-10-2022

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Short stable page link: Go to to create a permanent copy of this page - citation notes
Link to WoRMS (World Register of Marine Species)

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