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Morphology, evolution and stratigraphic distribution in the Middle Ordovician conodont genus Microzarkodina

Löfgren, Anita LU and Tolmacheva, Tatiana (2008) In Earth and Environmental Science Transactions of the Royal Society of Edinburgh 99(1). p.27-48
Abstract
Microzarkodina is a genus of mainly Middle Ordovician conodonts that has its centre of distribution in Baltoscandia, and much less commonly occurs in southern China, Australia, Argentina and Laurentia. In Baltica a series of species, Microzarkodina russica n. sp., M. flabellum, M. parva, M. Bella, M. Hagetiana and M. ozarkodella, established themselves successfully. The succession of species ranges from just below the base of the Middle Ordovician (M. russica) to the upper part of the Middle Ordovician (M. ozarkodella). The species are frequently used for biostratigraphical purposes. The largely contemporaneous species Microzarkodina bella and M. hagetiana probably both evolved from M. parva and mostly occurred in separate areas.... (More)
Microzarkodina is a genus of mainly Middle Ordovician conodonts that has its centre of distribution in Baltoscandia, and much less commonly occurs in southern China, Australia, Argentina and Laurentia. In Baltica a series of species, Microzarkodina russica n. sp., M. flabellum, M. parva, M. Bella, M. Hagetiana and M. ozarkodella, established themselves successfully. The succession of species ranges from just below the base of the Middle Ordovician (M. russica) to the upper part of the Middle Ordovician (M. ozarkodella). The species are frequently used for biostratigraphical purposes. The largely contemporaneous species Microzarkodina bella and M. hagetiana probably both evolved from M. parva and mostly occurred in separate areas. Microzarkodina ozarkodella probably evolved from M. hagetiana. This present investigation is based on a total of 94,208 elements, collected from 20 sections and one drill-core site in Sweden, one drill-core site and one outcrop in Estonia and two sections in the St Petersburg area in Russia. The Microzarkodina apparatus probably consisted of 15 or 17 elements: four P, two or four M and nine S elements. The S elements include different Sa, Sb-1, Sb-2, and Sc element types. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
keywords
Microzarkodina russica n., Conodonta, Baltoscandia, biostratigraphy, sp., taxonomy
in
Earth and Environmental Science Transactions of the Royal Society of Edinburgh
volume
99
issue
1
pages
27 - 48
publisher
Royal Society of Edinburgh
external identifiers
  • wos:000262218700003
  • scopus:57449102695
ISSN
1755-6929
DOI
10.1017/S1755691008007056
language
English
LU publication?
yes
id
00d58ff7-6e65-4799-8140-570b4c7831de (old id 1376249)
date added to LUP
2009-04-24 12:17:57
date last changed
2017-08-06 03:31:20
@article{00d58ff7-6e65-4799-8140-570b4c7831de,
  abstract     = {Microzarkodina is a genus of mainly Middle Ordovician conodonts that has its centre of distribution in Baltoscandia, and much less commonly occurs in southern China, Australia, Argentina and Laurentia. In Baltica a series of species, Microzarkodina russica n. sp., M. flabellum, M. parva, M. Bella, M. Hagetiana and M. ozarkodella, established themselves successfully. The succession of species ranges from just below the base of the Middle Ordovician (M. russica) to the upper part of the Middle Ordovician (M. ozarkodella). The species are frequently used for biostratigraphical purposes. The largely contemporaneous species Microzarkodina bella and M. hagetiana probably both evolved from M. parva and mostly occurred in separate areas. Microzarkodina ozarkodella probably evolved from M. hagetiana. This present investigation is based on a total of 94,208 elements, collected from 20 sections and one drill-core site in Sweden, one drill-core site and one outcrop in Estonia and two sections in the St Petersburg area in Russia. The Microzarkodina apparatus probably consisted of 15 or 17 elements: four P, two or four M and nine S elements. The S elements include different Sa, Sb-1, Sb-2, and Sc element types.},
  author       = {Löfgren, Anita and Tolmacheva, Tatiana},
  issn         = {1755-6929},
  keyword      = {Microzarkodina russica n.,Conodonta,Baltoscandia,biostratigraphy,sp.,taxonomy},
  language     = {eng},
  number       = {1},
  pages        = {27--48},
  publisher    = {Royal Society of Edinburgh},
  series       = {Earth and Environmental Science Transactions of the Royal Society of Edinburgh},
  title        = {Morphology, evolution and stratigraphic distribution in the Middle Ordovician conodont genus Microzarkodina},
  url          = {http://dx.doi.org/10.1017/S1755691008007056},
  volume       = {99},
  year         = {2008},
}