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Rhombopora

Rhombopora

Meek, 1872

GBIF:226325022

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Descriptions(4)

Diagnosis. Ramose colonies. Autozooecia with oval apertures and regularly thickened walls in the exozone, intersecting the colony surface at low angles. Diaphragms present in exozone. One or two acanthostyles located on the distal end of each aperture. Abundant aktinotostyles arranged in a regular pattern around the apertures. Metazooecia few to absent. Exozonal walls thick, laminated.
Ernst, Andrej, Claussen, Anna Lene, Seuss, Barbara, Wyse Jackson, Patrick N. (2022): Stenolaemate bryozoans from the Graham Formation, Pennsylvanian (Virgilian) at Lost Creek Lake, Texas, USA. Palaeontologia Electronica (a 15) 25 (2): 1-56, DOI: 10.26879/1174, URL: http://dx.doi.org/10.26879/1174
Remarks. Rhombopora Meek, 1872, differs from Megacanthopora Moore, 1929, in having fewer metazooecia. Rhombopora Meek, 1872, differs from Primorella Romantchuk and Kiseleva, 1968, through the presence of acanthostyles. Occurrence. Devonian – Permian; worldwide.
Ernst, Andrej, Claussen, Anna Lene, Seuss, Barbara, Wyse Jackson, Patrick N. (2022): Stenolaemate bryozoans from the Graham Formation, Pennsylvanian (Virgilian) at Lost Creek Lake, Texas, USA. Palaeontologia Electronica (a 15) 25 (2): 1-56, DOI: 10.26879/1174, URL: http://dx.doi.org/10.26879/1174
[= Shishoviclema Gorjunova, 1985]
Ernst, Andrej, Claussen, Anna Lene, Seuss, Barbara, Wyse Jackson, Patrick N. (2022): Stenolaemate bryozoans from the Graham Formation, Pennsylvanian (Virgilian) at Lost Creek Lake, Texas, USA. Palaeontologia Electronica (a 15) 25 (2): 1-56, DOI: 10.26879/1174, URL: http://dx.doi.org/10.26879/1174
Type species. Rhombopora lepidodendroides Meek, 1872, by original designation. Pennsylvanian (Upper Carboniferous), North America.
Ernst, Andrej, Claussen, Anna Lene, Seuss, Barbara, Wyse Jackson, Patrick N. (2022): Stenolaemate bryozoans from the Graham Formation, Pennsylvanian (Virgilian) at Lost Creek Lake, Texas, USA. Palaeontologia Electronica (a 15) 25 (2): 1-56, DOI: 10.26879/1174, URL: http://dx.doi.org/10.26879/1174

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CLASSIFICATION

Taxonomic Classification Tree

AnimaliaBryozoaStenolaemataCryptostomidaRhomboporidaeRhombopora

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Source Information

Stenolaemate bryozoans from the Graham Formation, Pennsylvanian (Virgilian) at Lost Creek Lake, Texas, USA

checklist

This dataset contains the digitized treatments in Plazi based on the original journal article Ernst, Andrej, Claussen, Anna Lene, Seuss, Barbara, Wyse Jackson, Patrick N. (2022): Stenolaemate bryozoans from the Graham Formation, Pennsylvanian (Virgilian) at Lost Creek Lake, Texas, USA. Palaeontologia Electronica (a 15) 25 (2): 1-56, DOI: 10.26879/1174, URL: http://dx.doi.org/10.26879/1174

ABSTRACT

An exceptionally well-preserved bryozoan fauna has been described from the Finis Shale Member, Graham Formation, Pennsylvanian (Virgilian) at Lost Creek Lake, Texas, USA. Nineteen bryozoan species (four cystoporates, one trepostome, two rhabdomesine cryptostomes, and 12 fenestrates) have been identified in two profiles which cut the most vertical range, at the level of the outcrop-base, of the Finis Shale. Two species are new: a trepostome Dyscritella felixi n. sp. and a fenestrate Laxifenestella texana n. sp. The fauna was studied on a combined basis of external and internal morphology, using a SEM and thin sections, respectively. Bryozoans from the Finis Shale Member exhibit a variety of growth forms from encrusting unilaminar, erect ramose, erect reticulate robust, and erect reticulate delicate, to erect pinnate morphologies. The erect growth forms clearly dominate, and bryozoans become more robust in the upper level of the profiles. The distribution pattern of bryozoan growth forms indicates gradual shallowing in the profiles supporting the assumption of a transgressive-regressive cycle in the Finis Shale. Bryozoan richness, abundance, and α-diversity increase toward the top of the profiles. Palaeobiogeographic relations of the Finis Shale bryozoans are mostly restricted to the American realm, with some connections to the Pennsylvanian of Europe.

Andrej Ernst. Institut für Geologie, Universität Hamburg, Bundesstr. 55, 20146 Hamburg, Germany. Andrej.Ernst@uni-hamburg.de

Anna Lene Claussen. GeoZentrum Nordbayern, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Loewenichstrasse 28, D-91054 Erlangen, Germany. anna.lene.claussen@fau.de

Barbara Seuss. GeoZentrum Nordbayern, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Loewenichstrasse 28, D-91054 Erlangen, Germany. barbara.seuss@fau.de

Patrick N. Wyse Jackson. Department of Geology, Trinity College, Dublin 2, Ireland. wysjcknp@tcd.ie

http://zoobank.org/ A4A07D50-3DDB-4E45-A255-1ECCF45F147A

Keywords: Finis Shale; cyclothem; North American Midcontinent; morphology; taxonomy; ecology

Submission: 1 July 2021. Acceptance: 29 April 2022.

Ernst A, Claussen A L, Seuss B, Wyse Jackson P N, felipe (2022). Stenolaemate bryozoans from the Graham Formation, Pennsylvanian (Virgilian) at Lost Creek Lake, Texas, USA. Plazi.org taxonomic treatments database. Checklist dataset https://doi.org/10.15468/baaezv accessed via GBIF.org on 2026-06-14.

CC0Published 5/31/2022View dataset
GBIF Usage Key
226325022
Dataset Key
77c06bea-bbd5-46af-8ef1-f434aa25c6a8
Origin
source
Backbone Key
4856419
Taxon ID
03C387F19A1039742C12052EF7F44BD0.taxon
Last Crawled
6/9/2026
Last Interpreted
6/9/2026
View on GBIFSource Reference