Distinguishing features: Parent taxon (Parhabdolithaceae): Murolith (protolith type) coccoliths with bicylic rims and central-areas spanned by an axial-cross or transverse bar bearing a broad, often long, spine. This taxon: Protolith coccoliths with high rim; central area with large spine supported by transverse bar. Often seen in side view
Daughter taxa (time control age-window is: 0-800Ma)
Parhabdolithus robustus Parhabdolithus with broad, parallel-sided, bluntly terminated spine. Spine usually terminates just above the rim, and does not exceed twice the rim height.
Parhabdolithus stubbingsii Elliptical murolith (protolith) with a high, flaring rim composed of non-imbricating elements; the central area is filled by the broad, granular base of a prominent distal process/spine and a proximal grid composed of bars aligned parallel with the short axis of the coccolith.
Distinguishing features: Parent taxon (Parhabdolithaceae): Murolith (protolith type) coccoliths with bicylic rims and central-areas spanned by an axial-cross or transverse bar bearing a broad, often long, spine. This taxon: Protolith coccoliths with high rim; central area with large spine supported by transverse bar. Often seen in side view
Morphology: Protolith coccoliths with high rim; central area with large spine supported by transverse bar. Bicyclic rim image in XPL, but often seen in side view
Lith size: 2.5->7µm; Data source notes: size range of included species
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range: Last occurrence (top): at top of Early Barremian Substage (100% up, 124.4Ma, in Barremian stage). Data source: Total of ranges of the species in this database First occurrence (base): within NJ2 zone (195.06-199.66Ma, base in Hettangian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 34-85. gsO
Bown, P. R. & Young, J. R. (1997). Mesozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 21-36. gs
Deflandre, G. (1952). Classe des Coccolithophoridés. (Coccolithophoridae. Lohmann, 1902). In, Grassé, P. P. (ed.) Traité de Zoologie. Masson, Paris 439-470. gs
Parhabdolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-3-2025
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