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Reappraisal of the brachiopod Acrotreta socialis von Seebach, 1865: clarifying 150 years of confusion

Topper, Timothy P.; Harper, David A. T. and Ahlberg, Per LU (2013) In GFF 135(2). p.191-203
Abstract
The acrotretide Acrotreta socialis von Seebach, 1865 has suffered a long and tumultuous history since its original description from the middle Cambrian (Guzhangian Stage) Andrarum Limestone of Bornholm, Denmark. Uncertainties regarding key morphological characters have resulted in numerous revisions and redescriptions of the species with much of the taxonomic shuffling occurring before the mid-20(th) century. A major problem with the early documentation of acrotretide brachiopods is that many species were described in the days before the advent of the Scanning Electron Microscope (SEM), resulting in dubious interpretations of significant morphological characteristics, like the position of the pedicle foramen and the internal morphology of... (More)
The acrotretide Acrotreta socialis von Seebach, 1865 has suffered a long and tumultuous history since its original description from the middle Cambrian (Guzhangian Stage) Andrarum Limestone of Bornholm, Denmark. Uncertainties regarding key morphological characters have resulted in numerous revisions and redescriptions of the species with much of the taxonomic shuffling occurring before the mid-20(th) century. A major problem with the early documentation of acrotretide brachiopods is that many species were described in the days before the advent of the Scanning Electron Microscope (SEM), resulting in dubious interpretations of significant morphological characteristics, like the position of the pedicle foramen and the internal morphology of both valves. A detailed revision of Acrotreta species resulted in the proposal that the genus is restricted solely to the Ordovician with the Bornholm acrotretide species subsequently left floating in taxonomic limbo. Recent taxonomic suggestions have been provisional, awaiting morphological information based on type or topotype material. The examination of topotype material in addition to supplementary material collected from southern Sweden has elucidated many of the previous ambiguous morphological characteristics of the species confirming that the original description was based on more than one brachiopod species. The new morphological information acquired here has resulted in the erection of a new acrotretid genus, Clupeafumosus gen. nov., to accommodate the material previously described as Acrotreta socialis. Co-occurring with Clupeafumosus socialis in southern Sweden is another new acrotretide brachiopod, Monophthalma andersoni sp. nov., which is additionally described. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
acrotretid, ceratretid, Cambrian, Bornholm, Scania, Andrarum Limestone
in
GFF
volume
135
issue
2
pages
191 - 203
publisher
Taylor & Francis
external identifiers
  • wos:000323317400006
  • scopus:84883332665
ISSN
2000-0863
DOI
10.1080/11035897.2013.811440
language
English
LU publication?
yes
id
c8b18fa9-5f25-4a15-8ae9-71616f9c6ee6 (old id 4026956)
date added to LUP
2013-10-08 09:57:11
date last changed
2019-02-20 02:18:31
@article{c8b18fa9-5f25-4a15-8ae9-71616f9c6ee6,
  abstract     = {The acrotretide Acrotreta socialis von Seebach, 1865 has suffered a long and tumultuous history since its original description from the middle Cambrian (Guzhangian Stage) Andrarum Limestone of Bornholm, Denmark. Uncertainties regarding key morphological characters have resulted in numerous revisions and redescriptions of the species with much of the taxonomic shuffling occurring before the mid-20(th) century. A major problem with the early documentation of acrotretide brachiopods is that many species were described in the days before the advent of the Scanning Electron Microscope (SEM), resulting in dubious interpretations of significant morphological characteristics, like the position of the pedicle foramen and the internal morphology of both valves. A detailed revision of Acrotreta species resulted in the proposal that the genus is restricted solely to the Ordovician with the Bornholm acrotretide species subsequently left floating in taxonomic limbo. Recent taxonomic suggestions have been provisional, awaiting morphological information based on type or topotype material. The examination of topotype material in addition to supplementary material collected from southern Sweden has elucidated many of the previous ambiguous morphological characteristics of the species confirming that the original description was based on more than one brachiopod species. The new morphological information acquired here has resulted in the erection of a new acrotretid genus, Clupeafumosus gen. nov., to accommodate the material previously described as Acrotreta socialis. Co-occurring with Clupeafumosus socialis in southern Sweden is another new acrotretide brachiopod, Monophthalma andersoni sp. nov., which is additionally described.},
  author       = {Topper, Timothy P. and Harper, David A. T. and Ahlberg, Per},
  issn         = {2000-0863},
  keyword      = {acrotretid,ceratretid,Cambrian,Bornholm,Scania,Andrarum Limestone},
  language     = {eng},
  number       = {2},
  pages        = {191--203},
  publisher    = {Taylor & Francis},
  series       = {GFF},
  title        = {Reappraisal of the brachiopod Acrotreta socialis von Seebach, 1865: clarifying 150 years of confusion},
  url          = {http://dx.doi.org/10.1080/11035897.2013.811440},
  volume       = {135},
  year         = {2013},
}