Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer
Previous genetic studies of extant planktonic foraminifera have provided evidence that the traditional, strictly morphological definition of species in these organisms underestimates their biodiversity. Here, we report the first case where this pattern is reversed. The modern (sub)tropical species p...
Main Authors: | , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/10255/dryad.40882 https://doi.org/10.5061/dryad.rb06j |
id |
ftdryad:oai:v1.datadryad.org:10255/dryad.40882 |
---|---|
record_format |
openpolar |
spelling |
ftdryad:oai:v1.datadryad.org:10255/dryad.40882 2023-05-15T18:00:24+02:00 Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer Quillevere, Frederic André, Aurore Weiner, Agnes Aurahs, Ralf Morard, Raphaël Douady, Christophe J. de Garidel-Thoron, Thibault Escarguel, Gilles de Vargas, Colomban Kucera, Michal 2012-07-25T20:44:30Z http://hdl.handle.net/10255/dryad.40882 https://doi.org/10.5061/dryad.rb06j unknown doi:10.5061/dryad.rb06j/1 doi:10.1666/0094-8373-39.1.21 doi:10.5061/dryad.rb06j Quillevere F, André A, Weiner A, Aurahs R, Morard R, Douady CJ, de Garidel-Thoron T, Escarguel G, de Vargas C, Kucera M (2013) Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer. Paleobiology 39(1): 21-39. http://hdl.handle.net/10255/dryad.40882 ribosomal DNA species concept gene flow planktonic foraminifera Article 2012 ftdryad https://doi.org/10.5061/dryad.rb06j https://doi.org/10.5061/dryad.rb06j/1 https://doi.org/10.1666/0094-8373-39.1.21 2020-01-01T14:57:09Z Previous genetic studies of extant planktonic foraminifera have provided evidence that the traditional, strictly morphological definition of species in these organisms underestimates their biodiversity. Here, we report the first case where this pattern is reversed. The modern (sub)tropical species plexus Globigerinoides sacculifer is characterized by large morphological variability, which has led to the proliferation of taxonomic names attributed to morphological end-members within the plexus. In order to clarify the taxonomic status of its morphotypes and to investigate the genetic connectivity among its currently partly disjunct (sub)tropical populations, we carried out a global survey of two ribosomal RNA regions (SSU and ITS-1) in all recent morphotypes of the plexus collected throughout (sub)tropical surface waters of the global ocean. Unexpectedly, we find an extremely reduced genetic variation within the plexus and no correlation between genetic and morphological divergence, suggesting taxonomical overinterpretation. The genetic homogeneity within the morphospecies is unexpected, considering its partly disjunct range in the (sub)tropical Atlantic and Indo-Pacific and its old age (early Miocene). A sequence variant in the rapidly evolving ITS-1 region indicates the existence of an exclusively Atlantic haplotype, which suggests an episode of relatively recent (last glacial) isolation, followed by subsequent resumption of unidirectional gene flow from the Indo-Pacific into the Atlantic. This is the first example in planktonic foraminifera where the morphological variability in a morphospecies exceeds its rDNA genetic variability. Such evidence for inconsistent scaling of morphological and genetic diversity in planktonic foraminifera could complicate the interpretation of evolutionary patterns in their fossil record. Article in Journal/Newspaper Planktonic foraminifera Dryad Digital Repository (Duke University) Pacific |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
ribosomal DNA species concept gene flow planktonic foraminifera |
spellingShingle |
ribosomal DNA species concept gene flow planktonic foraminifera Quillevere, Frederic André, Aurore Weiner, Agnes Aurahs, Ralf Morard, Raphaël Douady, Christophe J. de Garidel-Thoron, Thibault Escarguel, Gilles de Vargas, Colomban Kucera, Michal Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer |
topic_facet |
ribosomal DNA species concept gene flow planktonic foraminifera |
description |
Previous genetic studies of extant planktonic foraminifera have provided evidence that the traditional, strictly morphological definition of species in these organisms underestimates their biodiversity. Here, we report the first case where this pattern is reversed. The modern (sub)tropical species plexus Globigerinoides sacculifer is characterized by large morphological variability, which has led to the proliferation of taxonomic names attributed to morphological end-members within the plexus. In order to clarify the taxonomic status of its morphotypes and to investigate the genetic connectivity among its currently partly disjunct (sub)tropical populations, we carried out a global survey of two ribosomal RNA regions (SSU and ITS-1) in all recent morphotypes of the plexus collected throughout (sub)tropical surface waters of the global ocean. Unexpectedly, we find an extremely reduced genetic variation within the plexus and no correlation between genetic and morphological divergence, suggesting taxonomical overinterpretation. The genetic homogeneity within the morphospecies is unexpected, considering its partly disjunct range in the (sub)tropical Atlantic and Indo-Pacific and its old age (early Miocene). A sequence variant in the rapidly evolving ITS-1 region indicates the existence of an exclusively Atlantic haplotype, which suggests an episode of relatively recent (last glacial) isolation, followed by subsequent resumption of unidirectional gene flow from the Indo-Pacific into the Atlantic. This is the first example in planktonic foraminifera where the morphological variability in a morphospecies exceeds its rDNA genetic variability. Such evidence for inconsistent scaling of morphological and genetic diversity in planktonic foraminifera could complicate the interpretation of evolutionary patterns in their fossil record. |
format |
Article in Journal/Newspaper |
author |
Quillevere, Frederic André, Aurore Weiner, Agnes Aurahs, Ralf Morard, Raphaël Douady, Christophe J. de Garidel-Thoron, Thibault Escarguel, Gilles de Vargas, Colomban Kucera, Michal |
author_facet |
Quillevere, Frederic André, Aurore Weiner, Agnes Aurahs, Ralf Morard, Raphaël Douady, Christophe J. de Garidel-Thoron, Thibault Escarguel, Gilles de Vargas, Colomban Kucera, Michal |
author_sort |
Quillevere, Frederic |
title |
Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer |
title_short |
Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer |
title_full |
Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer |
title_fullStr |
Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer |
title_full_unstemmed |
Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer |
title_sort |
data from: the cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer globigerinoides sacculifer |
publishDate |
2012 |
url |
http://hdl.handle.net/10255/dryad.40882 https://doi.org/10.5061/dryad.rb06j |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
doi:10.5061/dryad.rb06j/1 doi:10.1666/0094-8373-39.1.21 doi:10.5061/dryad.rb06j Quillevere F, André A, Weiner A, Aurahs R, Morard R, Douady CJ, de Garidel-Thoron T, Escarguel G, de Vargas C, Kucera M (2013) Data from: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer. Paleobiology 39(1): 21-39. http://hdl.handle.net/10255/dryad.40882 |
op_doi |
https://doi.org/10.5061/dryad.rb06j https://doi.org/10.5061/dryad.rb06j/1 https://doi.org/10.1666/0094-8373-39.1.21 |
_version_ |
1766169471182962688 |