A redescription of Stenopora and the type species Stenopora tasmaniensis Lonsdale, 1844 (Trepostomata, Bryozoa)

Type material for Stenopora tasmaniensis Lonsdale, 1844 was lost in the late nineteenth century, and subsequent descriptions of the genus have been based on material incorrectly assigned to the type species. A neotype is erected for S. tasmaniensis from the original type locality and the genus redes...

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Bibliographic Details
Published in:Journal of paleontology 2021-11, Vol.95 (6), p.1147-1157
Main Author: Reid, Catherine M
Format: Article
Language:English
Subjects:
Aquatic invertebrates
Australasia
Australia
Bryozoa
Bundella Mudstone
Cisuralian
colonial taxa
Colonies
Darwin, Charles (1809-1882)
Diaphragms
Extinct species
Hobart Australia
invertebrate
lithostratigraphy
Lower Permian
microstructure
Morphology
neotypes
Paleontology
Paleozoic
Permian
REGULAR ARTICLES
Sakmarian
Statistical analysis
Stenopora
Stenopora tasmaniensis
Stenoporidae
Tasmania Australia
taxonomy
Trepostomata
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Description
Summary:Type material for Stenopora tasmaniensis Lonsdale, 1844 was lost in the late nineteenth century, and subsequent descriptions of the genus have been based on material incorrectly assigned to the type species. A neotype is erected for S. tasmaniensis from the original type locality and the genus redescribed. The genus exhibits ramose, frondescent, encrusting, and massive colony morphologies, diaphragms are absent, and acanthostyles of a single size surround each aperture. This single size of acanthostyles aligns with the original type species description; however, it differs from the subsequently accepted genus description and may result in existing species being removed from the genus. Analysis of zooecial characters of a single colony exhibiting both frondescent and ramose morphologies reveals statistically significant differences between subsampled sections, despite being from the same colony. Differences relate to details of zooecial parameters and are not controlled by colony morphology. This variation within a single colony confirms the importance of using qualitative characters alongside quantitative measures in defining Paleozoic bryozoan species.
ISSN:0022-3360
1937-2337
DOI:10.1017/jpa.2021.73