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Article: The oldest erect cheilostome bryozoan: Jablonskipora gen. nov. from the upper Albian of south‐west England

Papers in Palaeontology - Volume 4 Part 1 - Cover Image
Publication: Palaeontology
Volume: 4
Part: 1
Publication Date: Febuary 2018
Page(s): 55 66
Author(s): Silviu O. Martha, and Paul D. Taylor
DOI: 10.1002/spp2.1097
Addition Information

How to Cite

MARTHA, S.O., TAYLOR, P.D. 2018. The oldest erect cheilostome bryozoan: Jablonskipora gen. nov. from the upper Albian of south‐west England . Papers in Palaeontology, 4, 1, 55-66. DOI: 10.1002/spp2.1097

Author Information

  • Silviu O. Martha - Department of Life Sciences Natural History Museum Cromwell Road London SW7 5BD UK
  • Paul D. Taylor - Department of Earth Sciences Natural History Museum Cromwell Road London SW7 5BD UK

Publication History

  • Issue published online: 08 February 2018
  • Manuscript Accepted: 16 September 2017
  • Manuscript Received: 05 August 2017

Funded By

Leverhulme Trust. Grant Number: RPG‐2016‐429

Online Version Hosted By

Wiley Online Library
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Abstract

Although dominant at the present day, the bryozoan order Cheilostomata did not appear until the Late Jurassic. For over 55 million years after their first appearance, cheilostomes remained low in diversity and disparity, exclusively encrusting and scant in the fossil record. During the late Albian, however, cheilostomes began an explosive diversification coinciding with the appearance of several key novelties. In this paper, we describe a new monospecific cheilostome genus, Jablonskipora gen. nov. (type species Jablonskipora kidwellae gen. et sp. nov.), of importance as the oldest known cheilostome with erect growth. Jablonskipora kidwellae is a malacostegine cheilostome characterized by rigidly erect colonies with cylindrical, bifurcating branches and is moderately common in sedimentary rocks of late Albian age in south‐west England. Autozooids are dimorphic, with long tubular autozooids in the axial endozone covered by multiple layers of short, stacked, box‐shaped autozooids in the surrounding exozone. It is assigned to Chiplonkarinidae, a family now containing five genera, a tabular key for the discrimination of which is provided. The morphology of Jablonskipora and the early evolution of erect growth in cheilostomes are discussed.

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