Exceptionally preserved Mickwitzia from the Indian Springs Lagerstatte (Cambrian Stage 3), Nevada
(2015) In Journal of Paleontology 89(6). p.933-955- Abstract
Exceptionally preserved specimens of the Cambrian stem-group brachiopod Mickwitzia occidens Walcott, 1908 are described in detail from the Indian Springs Lagerstatte in Nevada, USA. Shell structure and preserved mantle setae from these specimens reveal a variable diagenetic (taphonomic) history and provide insight into the phylogenetic position of mickwitziids. Morphologic and morphometric comparison to M. monilifera (Linnarsson, 1869) from Sweden and M. muralensis Walcott, 1913 from British Columbia, Canada reveals clear species-level distinctions. Scanning electron microscopic analysis allows revision of the generic diagnosis. The Mickwitzia shell is characterized by the presence of inwardly pointing phosphatic cones and tangential... (More)
Exceptionally preserved specimens of the Cambrian stem-group brachiopod Mickwitzia occidens Walcott, 1908 are described in detail from the Indian Springs Lagerstatte in Nevada, USA. Shell structure and preserved mantle setae from these specimens reveal a variable diagenetic (taphonomic) history and provide insight into the phylogenetic position of mickwitziids. Morphologic and morphometric comparison to M. monilifera (Linnarsson, 1869) from Sweden and M. muralensis Walcott, 1913 from British Columbia, Canada reveals clear species-level distinctions. Scanning electron microscopic analysis allows revision of the generic diagnosis. The Mickwitzia shell is characterized by the presence of inwardly pointing phosphatic cones and tangential setae-bearing tubes. The inwardly pointing cone structures are not consistent with setal bearing structures as previously thought, but rather represent endopunctae-like structures. Acrotretid-like shell structures and shell-penetrating setae in M. occidens strengthen the previously proposed close relationship between stem-group brachiopods and tommotiids, a group of small shelly fossils.
(Less)
- author
- Butler, Aodhan D. ; Streng, Michael ; Holmer, Lars E. and Babcock, Loren E. LU
- organization
- publishing date
- 2015-11-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Paleontology
- volume
- 89
- issue
- 6
- pages
- 23 pages
- publisher
- Paleontological Society
- external identifiers
-
- wos:000376768500004
- scopus:84971411269
- ISSN
- 0022-3360
- DOI
- 10.1017/jpa.2016.8
- language
- English
- LU publication?
- yes
- id
- 50c074bf-f2c2-430b-a9b8-fbfda0c0c855
- date added to LUP
- 2016-12-22 11:05:02
- date last changed
- 2024-01-04 19:38:20
@article{50c074bf-f2c2-430b-a9b8-fbfda0c0c855,
abstract = {{<p>Exceptionally preserved specimens of the Cambrian stem-group brachiopod Mickwitzia occidens Walcott, 1908 are described in detail from the Indian Springs Lagerstatte in Nevada, USA. Shell structure and preserved mantle setae from these specimens reveal a variable diagenetic (taphonomic) history and provide insight into the phylogenetic position of mickwitziids. Morphologic and morphometric comparison to M. monilifera (Linnarsson, 1869) from Sweden and M. muralensis Walcott, 1913 from British Columbia, Canada reveals clear species-level distinctions. Scanning electron microscopic analysis allows revision of the generic diagnosis. The Mickwitzia shell is characterized by the presence of inwardly pointing phosphatic cones and tangential setae-bearing tubes. The inwardly pointing cone structures are not consistent with setal bearing structures as previously thought, but rather represent endopunctae-like structures. Acrotretid-like shell structures and shell-penetrating setae in M. occidens strengthen the previously proposed close relationship between stem-group brachiopods and tommotiids, a group of small shelly fossils.</p>}},
author = {{Butler, Aodhan D. and Streng, Michael and Holmer, Lars E. and Babcock, Loren E.}},
issn = {{0022-3360}},
language = {{eng}},
month = {{11}},
number = {{6}},
pages = {{933--955}},
publisher = {{Paleontological Society}},
series = {{Journal of Paleontology}},
title = {{Exceptionally preserved Mickwitzia from the Indian Springs Lagerstatte (Cambrian Stage 3), Nevada}},
url = {{http://dx.doi.org/10.1017/jpa.2016.8}},
doi = {{10.1017/jpa.2016.8}},
volume = {{89}},
year = {{2015}},
}