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New Species of Taxocrinus and Synbathocrinus and other Rare Crinoids from the Carboniferous Limestone of Coplow Knoll, Clitheroe

Published online by Cambridge University Press:  01 May 2009

James Wright
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In a previous paper (Wright, 1935, p. 193) it was remarked that the crinoids of Coplow Knoll, Clitheroe, mainly consist of calices or thecae only and that specimens showing any part of the arms are extremely rare. In the paper cited, photographs were given of two specimens with arms, one being referred to a new species Cyathocrinus patulosus and the other to Pachylocrinus aff. longidactylus (Austin). Flexible crinoids belonging to the genus Euryocrinus, with part of the arm structure preserved, have also been recorded and a Poteriocrinid assigned to Pachylocrinus conicus (Phillips) (Wright, 1928, 1942). The latter species and P. aff. longidactylus mentioned above will probably have to be removed to another genus but it is not intended to discuss them at present. All these specimens were found at rather long intervals. I was therefore agreeably surprised on a recent visit to Coplow to find two fairly well-preserved crowns belonging to the genera Taxocrinus and Synbathocrinm and since the species represented by these specimens appear to differ from known forms they are now described in the present paper. An excellently preserved specimen of a species of Platycrinites was also found. This specimen shows a good part of the arm structure and although it is not possible to determine with certainty its specific identity the type of preservation exhibited by it is so rare at Coplow that it is here deemed worthy of being placed on record. Another specimen with arms, probably belonging to the same genus and found a few years ago is also recorded (Plate VII, fig. 1; Plate VIII, fig. 4).

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Geological Magazine , Volume 83 , Issue 3 , June 1946 , pp. 121 - 128
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Copyright © Cambridge University Press 1946

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References

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