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Citation for Study 21823

Citation title: "Diversification and biogeographic history of the Western Palearctic freshwater flatworm genus Schmidtea (Tricladida: Dugesiidae), with a re-description of S. nova".

Study name: "Diversification and biogeographic history of the Western Palearctic freshwater flatworm genus Schmidtea (Tricladida: Dugesiidae), with a re-description of S. nova".

This study is part of submission 21823 (Status: Published).

Citation

Leria L., Sluys R., & Riutort M. 2018. Diversification and biogeographic history of the Western Palearctic freshwater flatworm genus Schmidtea (Tricladida: Dugesiidae), with a re-description of S. nova. Journal of Zoological Systematics and Evolutionary Research, .

Authors

• Leria L. (submitter) +34 934021746
• Sluys R.
• Riutort M.

Abstract

The freshwater flatworm genus Schmidtea is endemic in the Western Palearctic region, where it is represented by only four species, thus contrasting with the high species diversity of the closely related genus Dugesia within Europe. Although containing an important model species in developmental and regeneration research, viz. Schmidtea mediterranea, no evolutionary studies on the genus Schmidtea have been undertaken. For the first time, we present a well-resolved molecular phylogenetic tree of the four species of the genus, inferred on the basis of two molecular markers, and provide also the first detailed morphological account of Schmidtea nova. The phylogenetic tree generated corroborates an earlier speciation hypothesis based on karyological data and points to chromosomal rearrangements as the main drivers of speciation in this genus. The high genetic divergence between the four species, in combination with previous dating studies and their current geographic distribution, suggests that Schmidtea could have originated in Laurasia but lost most of its diversity during the Oligocene. Thus, its present distribution pattern may be the result of the expansion of three of its four relictual species over Europe, probably after the Pleistocene glaciations. Our detailed morphological study of S. nova revealed that it shows a number of remarkable features: interconnected testis follicles, parovaria, an ejaculatory duct exiting into the primary as well as the secondary seminal vesicle by means of a nipple, and the wall of the distal section of the ejaculatory duct being sclerotic or chitinized.

Keywords

Schmidtea, speciation, taxonomy, molecular phylogeny, biogeography

External links

• DOI: 10.1111/jzs.12214

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S21823
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref27816,
  	 author = {Laia  Leria and Ronald  Sluys and Marta  Riutort},
  	 title = {Diversification and biogeographic history of the Western Palearctic freshwater flatworm genus Schmidtea (Tricladida: Dugesiidae), with a re-description of S. nova},
  	 year = {2018},
  	 keywords = {Schmidtea, speciation, taxonomy, molecular phylogeny, biogeography},
  	 doi = {10.1111/jzs.12214},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Journal of Zoological Systematics and Evolutionary Research},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {The freshwater flatworm genus Schmidtea is endemic in the Western Palearctic
  region, where it is represented by only four species, thus contrasting with the high
  species diversity of the closely related genus Dugesia within Europe. Although containing
  an important model species in developmental and regeneration research, viz.
  Schmidtea mediterranea, no evolutionary studies on the genus Schmidtea have been
  undertaken. For the first time, we present a well-resolved molecular phylogenetic
  tree of the four species of the genus, inferred on the basis of two molecular markers,
  and provide also the first detailed morphological account of Schmidtea nova.
  The phylogenetic tree generated corroborates an earlier speciation hypothesis based
  on karyological data and points to chromosomal rearrangements as the main drivers
  of speciation in this genus. The high genetic divergence between the four species,
  in combination with previous dating studies and their current geographic distribution,
  suggests that Schmidtea could have originated in Laurasia but lost most of its
  diversity during the Oligocene. Thus, its present distribution pattern may be the
  result of the expansion of three of its four relictual species over Europe, probably
  after the Pleistocene glaciations. Our detailed morphological study of S. nova
  revealed that it shows a number of remarkable features: interconnected testis follicles,
  parovaria, an ejaculatory duct exiting into the primary as well as the secondary
  seminal vesicle by means of a nipple, and the wall of the distal section of the ejaculatory
  duct being sclerotic or chitinized.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 27816
  AU  - Leria,Laia 
  AU  - Sluys,Ronald 
  AU  - Riutort,Marta 
  T1  - Diversification and biogeographic history of the Western Palearctic freshwater flatworm genus Schmidtea (Tricladida: Dugesiidae), with a re-description of S. nova
  PY  - 2018
  KW  - Schmidtea
  KW  - speciation
  KW  - taxonomy
  KW  - molecular phylogeny
  KW  - biogeography
  UR  - http://dx.doi.org/10.1111/jzs.12214
  N2  - The freshwater flatworm genus Schmidtea is endemic in the Western Palearctic
  region, where it is represented by only four species, thus contrasting with the high
  species diversity of the closely related genus Dugesia within Europe. Although containing
  an important model species in developmental and regeneration research, viz.
  Schmidtea mediterranea, no evolutionary studies on the genus Schmidtea have been
  undertaken. For the first time, we present a well-resolved molecular phylogenetic
  tree of the four species of the genus, inferred on the basis of two molecular markers,
  and provide also the first detailed morphological account of Schmidtea nova.
  The phylogenetic tree generated corroborates an earlier speciation hypothesis based
  on karyological data and points to chromosomal rearrangements as the main drivers
  of speciation in this genus. The high genetic divergence between the four species,
  in combination with previous dating studies and their current geographic distribution,
  suggests that Schmidtea could have originated in Laurasia but lost most of its
  diversity during the Oligocene. Thus, its present distribution pattern may be the
  result of the expansion of three of its four relictual species over Europe, probably
  after the Pleistocene glaciations. Our detailed morphological study of S. nova
  revealed that it shows a number of remarkable features: interconnected testis follicles,
  parovaria, an ejaculatory duct exiting into the primary as well as the secondary
  seminal vesicle by means of a nipple, and the wall of the distal section of the ejaculatory
  duct being sclerotic or chitinized.
  L3  - 10.1111/jzs.12214
  JF  - Journal of Zoological Systematics and Evolutionary Research
  VL  - 
  IS  - 
  ER  -