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1984•Proceedings of the Yorkshire Geological SocietyRequires access

Crinoid arms from Salthill Quarry, Clitheroe, Lancashire

Stephen Kenneth Donovan, George D. Sevastopulo

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Abstract

SUMMARY Inadunates dominate the Chadian crinoid fauna of Salthill Quarry, Clitheroe, Lancashire, despite the apparent prevalence of camerates. Well-preserved arms of a crinoid, which have swollen axillaries and an ornament of tubercles, are derived from a new taxon of inadunate crinoid. The arms are pinnulate and branching is heterotomous at the secundaxils (except in the A-ray, which does not divide at this level). Dissociated brachials and radials of this species are common.

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SUMMARY Inadunates dominate the Chadian crinoid fauna of Salthill Quarry, Clitheroe, Lancashire, despite the apparent prevalence of camerates. Well-preserved arms of a crinoid, which have swollen axillaries and an ornament of tubercles, are derived from a new taxon of inadunate crinoid. The arms are pinnulate and branching is heterotomous at the secundaxils (except in the A-ray, which does not divide at this level). Dissociated brachials and radials of this species are common.

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Available abstract

SUMMARY Inadunates dominate the Chadian crinoid fauna of Salthill Quarry, Clitheroe, Lancashire, despite the apparent prevalence of camerates. Well-preserved arms of a crinoid, which have swollen axillaries and an ornament of tubercles, are derived from a new taxon of inadunate crinoid. The arms are pinnulate and branching is heterotomous at the secundaxils (except in the A-ray, which does not divide at this level). Dissociated brachials and radials of this species are common.

Key concepts: Crinoid, Fauna, Paleontology, Taxon, Geology, Geography, Ecology, Biology

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