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CATALOG - Parhabdolithaceae


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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: Parhabdolithaceae Bown, 1987

Compiled data

Citation: Parhabdolithaceae Bown, 1987
taxonomic rank: Family
Described on page(s) : 21
Current citation: Parhabdolithaceae Bown, 1987


Original Description

Diagnosis. 'Coccoliths with a protolith rim structure, i.e. a rim typically consisting of a dominant and characteristic distal shield composed of laths arranged vertically and subvertically and tangentially to an ellipse with sutures perpendicular to the coccolith base; and a proximal shield composed of elements with a triangular cross-section which form a flat coccolith base with radiating sutures and also extend upwards ot form an inner cycle ot the distal shield' (Bown 1987).
LM characteristics. As for the Zygodiscacee; the imbrication or non-imbrication of the distal shield elements cannot be distinguished.

Extra details from original publication
Remarks. The subfamily Parhabdolithoidea erected by Gartner (1968) was defined to include genera possessing loxolith rim structures, based on the misconception that Parhabdolithus typified loxolith construction. The family Apertiaceae erected by Goy (1981) is also unavailable as it is based on a coccolith which is a junior synonym of Crucirhabdus primulus. The Crepidolithaceae Black, 1971 is not used, as the genus Crepidolithus includes a majority of species which show considerable inclination of their outer wall elements and thus belong to the Zygodiscaceae Hay and Mohler, 1967.

Included genera. Bucanthus, Crucirhabdus, Diductius, Mitrolithus, Parhabdolithus, Timorella.

Range. Upper Triassic to ?Middle Jurassic.

References:

Black, M. (1971c). The systematics of coccoliths in relation to the paleontological record. In, Funnell, B. M. & Riedel, W. R. (eds) The Micropaleontology of the Oceans. Cambridge University Press, Cambridge 611-624. gs O

Bown, P. R. (1987a). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 1-118. gs

Gartner, S. (1968). Coccoliths and related calcareous nannofossils from Upper Cretaceous deposits of Texas and Arkansas. University of Kansas Paleontological Contributions, Articles. 48 (Protista 1): 1-56. gs O

Goy, G. (1981). Nannofossiles calcaires des schistes carbon (Toarcien Inferieur) du Bassin de Paris. Doc. de la RCP 459, Nature et genese des facies confines, (Editions du BRGM). 1: 1-86. gs O


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Parhabdolithaceae: Catalog entry compiled by <% compiler %>. Viewed: 11-9-2024

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