Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-12-02T23:41:24.510Z Has data issue: false hasContentIssue false

Ramseyocrinus (Crinoidea) from the Arenig of Morocco

Published online by Cambridge University Press:  19 May 2016

Stephen K. Donovan
Affiliation:
Department of Geology, University of the West Indies, Mona, Kingston 7, Jamaica
Jeremy J. Savill
Affiliation:
Garris House, Airton, Skipton, North Yorks, BD23 4AL, England

Abstract

The discovery of the arms of the disparid inadunate crinoid Ramseyocrinus Bates from the Arenig (Lower Ordovician) of Morocco extends the geographic range of this genus, previously only known from south Wales, United Kingdom, and the Montagne Noire, France. It is probable that the Moroccan specimen represents a new species. This is the first Lower Ordovician crinoid to be described from Africa.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bates, D. E. B. 1968. On “Dendrocrinus” cambriensis Hicks, the earliest known crinoid. Palaeontology, 11:406409.Google Scholar
Chauvel, J. 1971. Les echinodermes carpoides du Paleozoique inférieur marocain. Notes du Service géologique Maroc, 31:4960.Google Scholar
Chauvel, J. 1978. Compléments sur les Echinodermes du Paléozoïque marocain (Diploporites, Eocrinoïdes, Edrioastéroïdés). Notes du Service géologique Maroc, 39:2778.Google Scholar
Donovan, S. K. 1984. Ramseyocrinus and Ristnacrinus from the Ordovician of Britain. Palaeontology, 27:623634.Google Scholar
Donovan, S. K. 1986. Pelmatozoan columnals from the Ordovician of the British Isles. Part 1. Palaeontographical Society Monograph, 138 (for 1984), 568:168.Google Scholar
Donovan, S. K. 1988. Early radiation of the Crinoidea. In Paul, C. R. C. and Smith, A. B. (eds.), Echinoderm Phylogeny and Evolutionary Biology. Oxford University Press.Google Scholar
Hicks, H. 1873. On the Tremadoc rocks in the neighbourhood of St. David's, south Wales, and their fossil contents. Quarterly Journal of the Geological Society of London, 29:3952.Google Scholar
Lane, N. G. 1970. Lower and Middle Ordovician crinoids from west-central Utah. Brigham Young University Geology Studies, 17:317.Google Scholar
Miller, J. S. 1821. A natural history of the Crinoidea or lily-shaped animals, with observations on the genera Asteria, Euryale, Comatula and Marsupites. Bryan and Co., Bristol, 150 p.Google Scholar
Moore, R. C., and Laudon, L. R. 1943. Evolution and classification of Paleozoic crinoids. Geological Society of America Special Paper 46, 153 p.Google Scholar
Smith, A. G., Hurley, A. M., and Briden, J. C. 1981. Phanerozoic Palaeocontinental World Maps. Cambridge University Press, 102 p.Google Scholar
Ubaghs, G. 1969. Aethocrinus mooreiUbaghs, n. gen., n. sp., le plus ancien crinoide dicyclique connu. Paleontological Contributions of the University of Kansas, Paper 38, 25 p.Google Scholar
Ubaghs, G. 1983. Echinodermata. Notes sur les echinodermes de l'Ordovicien inférieur de la Montagne Noire, p. 3355. In Courtessole, R., Marek, L., Pillet, J., Ubaghs, G., and Vizcaino, D. (eds.), Calymenina, Echinodermata et Hyolitha de l'Ordovicien inférieur de la Montagne Noire (France Méridionale). Mémoire de la Société d'Études Scientifiques de l'Aude Carcassonne.Google Scholar