Nannotax3 - ntax_main - Cretarhabdus madingleyensis

Citation: Cretarhabdus madingleyensis (Black, 1971) Crux, 1989

Basionym: Polypodorhabdus madingleyensis Black, 1971

Synonyms:

Retecapsa madingleyensis (Black, 1971)

Variants:

Cretarhabdus delicatus Applegate, Covington & Wise, in Covington & Wise 1987 - similar but with more bars per quadrant. Also illustrated by Applegate & Bergen 1988. There appears to be overlap in usage between the names C. madingleyensis and C. delicatus so they are listed here as variants [JRY Dec 2014]

Taxonomic discussion: The species was invalidly introduced by Black (1968) and subsequently validated by Black (1971)

Distinguishing features:
Parent taxon (Cretarhabdus): Cretarhabdids with central area net that often includes axial cross bars.
This taxon: Medium to large (7-12 µm) with relatively wide central area and multiple lateral bars (~4 in each quadrant).

Black (1968) originally described this species from the Oxfordian, but his Jurassic forms have 20 bars in their central grill and are probably indistinguishable from Polypodorhabdus escaigii Noël, 1965. He subsequently (1971a, 1972) described the species in considerably more detail from the Lower Cretaceous; all of his Cretaceous specimens have four bars in each quadrant, and the Hauterivian-Barremian forms were generally larger than older or younger specimens. Sissingh (1977) may have had a similar concept for Cretarhabdus loriei, whose FO he used to define the base of the Lower Hauterivian C. loriei NZ(CC4).
Crux (1989) recorded C. madingleyensis down to the Upper Ryazanian of Speeton, but included small forms and possibly R. surirella (sensu stricto)in his concept.

Geological Range:
Last occurrence (top): within Barremian Stage (121.40-126.50Ma, top in Barremian stage). Data source: Bown et al. 1998
First occurrence (base): within Oxfordian Stage (154.78-161.50Ma, base in Oxfordian stage). Data source: Bown & Cooper 1998

References:

Applegate, J. L. & Bergen, J. A. (1988). Cretaceous calcareous nannofossil biostratigraphy of sediments recovered from the Galicia Margin, ODP Leg 103. Proceedings of the Ocean Drilling Program, Scientific Results. 103: 293-348. gs O

Black, M. (1968). Taxonomic problems in the study of coccoliths. Palaeontology. 11: 793-813. gs

Black, M. (1971a). Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society. 38: 381-424. gs

Black, M. (1972a). British Lower Cretaceous Coccoliths. I-Gault Clay (Part 1). Palaeontographical Society Monograph. 126: 1-48. gs

Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 34-85. gs O

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 Site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs O

Crux, J. A. (1989). Biostratigraphy and palaeogeographical applications of Lower Cretaceous nannofossils from north-western Europe. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series . 143-211. gs

de Kaenel, E. & Bergen, J. A. (1996b). Mesozoic calcareous nannofossil biostratigraphy from sites 897, 899, and 901, Iberia Abyssal Plain: New biostratigraphic evidence. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 27-59. gs O

Medd, A. W. (1979). The Upper Jurassic coccoliths from the Haddenham and Gamlingay boreholes (Cambridgeshire, England). Eclogae Geologicae Helvetiae. 72: 19-109. gs O

Mutterlose, J. & Wise, S. W. (1990). Lower Cretaceous nannofossil biostratigraphy of ODP Leg 113 Holes 692B and 693A, continental slope off east Antarctica, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 325-351. gs

Noël, D. (1965). Sur les Coccolithes du Jurassique Européen et d'Afrique du Nord. Essai de classification des coccolithes fossiles. Éditions du Centre National de la Recherche Scientifique, Paris. 1-209. gs

Rahman, A. & Roth, P. H. (1992). New calcareous nannofossil taxa of Jurassic and early Cretaceous age from the Oka River region in Central Russia. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 184: 251-277. gs

Sissingh, W. (1977). Biostratigraphy of Cretaceous calcareous nannoplankton. Geologie en Mijnbouw. 65(1): 37-65. gs

Cretarhabdus madingleyensis

References:

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