The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana
The eoorthid brachiopod Apheoorthina is reported for the first time from the Lower Ordovician of NW Argentina. It is represented by a species similar to A. ferrigena from the Tremadocian of the Prague Basin, increasing the faunal affinities between the Central Andean Basin and the South European mic...
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ftdoajarticles:oai:doaj.org/article:04060088da7e4daebd0a094c81414034 2023-05-15T13:51:44+02:00 The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana Diego F. Muñoz Juan L. Benedetto 2016-08-01T00:00:00Z https://doi.org/10.4202/app.00241.2016 https://doaj.org/article/04060088da7e4daebd0a094c81414034 EN eng Institute of Paleobiology PAS http://www.app.pan.pl/archive/published/app61/app002412016.pdf https://doaj.org/toc/0567-7920 https://doaj.org/toc/1732-2421 doi:10.4202/app.00241.2016 0567-7920 1732-2421 https://doaj.org/article/04060088da7e4daebd0a094c81414034 Acta Palaeontologica Polonica, Vol 61, Iss 3, Pp 633-644 (2016) Brachiopoda palaeobiogeography Ordovician Tremadocian Gondwana Perunica Argentina Fossil man. Human paleontology GN282-286.7 Paleontology QE701-760 article 2016 ftdoajarticles https://doi.org/10.4202/app.00241.2016 2022-12-31T03:22:57Z The eoorthid brachiopod Apheoorthina is reported for the first time from the Lower Ordovician of NW Argentina. It is represented by a species similar to A. ferrigena from the Tremadocian of the Prague Basin, increasing the faunal affinities between the Central Andean Basin and the South European microcontinents, in particular the Bohemian region (Perunica). Nine out of the fourteen brachiopod genera reported from the Tremadocian of the Central Andean Basin (~64%) are shared with the Mediterranean region, four of which (~28%) have been recorded in the Prague Basin, and two (Kvania and Apheoorthina) are restricted to the Central Andes and Perunica. Dispersal pathways around Gondwana are analyzed in the light of major factors affecting large-scale distribution of brachiopods (environment, larval capacity for dispersal, oceanic currents). The presence in Apheoorthina aff. ferrigena of a well-preserved larval protegulum measuring 420 μm in width and 210 μm in length strongly suggests that this species had planktotrophic larvae capable of long-distance dispersal. According to recent ocean-atmosphere general circulation models for the Ordovician Period, the Central Andean margin was dominated by the cold-water Antarctica Current. Despite the complex non-zonal pattern produced by current deflections around the peri-Gondwanan microcontinents, the general westward circulation sense favoured larval dispersal from the Andean region to North Africa, Avalonia, the Armorican Terrane Assemblage, and Perunica. On the other hand, the eastwards flowing Gondwana Current connected the North Gondwana waters with the South American epicontinental seas, which could explain the reversed migration of some brachiopods. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Argentina Acta Palaeontologica Polonica 61 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Brachiopoda palaeobiogeography Ordovician Tremadocian Gondwana Perunica Argentina Fossil man. Human paleontology GN282-286.7 Paleontology QE701-760 |
spellingShingle |
Brachiopoda palaeobiogeography Ordovician Tremadocian Gondwana Perunica Argentina Fossil man. Human paleontology GN282-286.7 Paleontology QE701-760 Diego F. Muñoz Juan L. Benedetto The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana |
topic_facet |
Brachiopoda palaeobiogeography Ordovician Tremadocian Gondwana Perunica Argentina Fossil man. Human paleontology GN282-286.7 Paleontology QE701-760 |
description |
The eoorthid brachiopod Apheoorthina is reported for the first time from the Lower Ordovician of NW Argentina. It is represented by a species similar to A. ferrigena from the Tremadocian of the Prague Basin, increasing the faunal affinities between the Central Andean Basin and the South European microcontinents, in particular the Bohemian region (Perunica). Nine out of the fourteen brachiopod genera reported from the Tremadocian of the Central Andean Basin (~64%) are shared with the Mediterranean region, four of which (~28%) have been recorded in the Prague Basin, and two (Kvania and Apheoorthina) are restricted to the Central Andes and Perunica. Dispersal pathways around Gondwana are analyzed in the light of major factors affecting large-scale distribution of brachiopods (environment, larval capacity for dispersal, oceanic currents). The presence in Apheoorthina aff. ferrigena of a well-preserved larval protegulum measuring 420 μm in width and 210 μm in length strongly suggests that this species had planktotrophic larvae capable of long-distance dispersal. According to recent ocean-atmosphere general circulation models for the Ordovician Period, the Central Andean margin was dominated by the cold-water Antarctica Current. Despite the complex non-zonal pattern produced by current deflections around the peri-Gondwanan microcontinents, the general westward circulation sense favoured larval dispersal from the Andean region to North Africa, Avalonia, the Armorican Terrane Assemblage, and Perunica. On the other hand, the eastwards flowing Gondwana Current connected the North Gondwana waters with the South American epicontinental seas, which could explain the reversed migration of some brachiopods. |
format |
Article in Journal/Newspaper |
author |
Diego F. Muñoz Juan L. Benedetto |
author_facet |
Diego F. Muñoz Juan L. Benedetto |
author_sort |
Diego F. Muñoz |
title |
The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana |
title_short |
The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana |
title_full |
The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana |
title_fullStr |
The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana |
title_full_unstemmed |
The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana |
title_sort |
eoorthid brachiopod apheoorthina in the lower ordovician of nw argentina and the dispersal pathways along western gondwana |
publisher |
Institute of Paleobiology PAS |
publishDate |
2016 |
url |
https://doi.org/10.4202/app.00241.2016 https://doaj.org/article/04060088da7e4daebd0a094c81414034 |
geographic |
Argentina |
geographic_facet |
Argentina |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Acta Palaeontologica Polonica, Vol 61, Iss 3, Pp 633-644 (2016) |
op_relation |
http://www.app.pan.pl/archive/published/app61/app002412016.pdf https://doaj.org/toc/0567-7920 https://doaj.org/toc/1732-2421 doi:10.4202/app.00241.2016 0567-7920 1732-2421 https://doaj.org/article/04060088da7e4daebd0a094c81414034 |
op_doi |
https://doi.org/10.4202/app.00241.2016 |
container_title |
Acta Palaeontologica Polonica |
container_volume |
61 |
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1766255761382440960 |