Molecules and morphology reveal ‘new’ widespread North American freshwater mussel species (Bivalvia: Unionidae)

Sean M. Keogh, Andrew M Simons

Research output: Contribution to journalArticle

Abstract

In the Family Unionidae, the greatest radiation of freshwater mussels, malacologists have been misled by extreme intraspecific shell variation and conversely interspecific conchological stasis or convergence. We characterized the genetic and morphological diversity of two phenotypes of Lampsilis teres from specimens (n = 108) collected across its distribution using geometric and traditional morphometrics and multilocus molecular phylogenetics to test the hypothesis that phenotypes represent separate species. Results from our morphometric and molecular phylogenetic analyses unanimously indicate that L. teres sensu lato is made up of two divergent, widespread species with overlapping distributions. We describe a new species and provide a revised description of L. teres sensu stricto. We use morphometrics and machine-learning classification algorithms to test if shell morphology alone can be used to discriminate between these species. Classification percentages of 97.02% and 93.86% demonstrate that shell morphology is highly informative for species identification. This study highlights our lack of understanding of species diversity of freshwater mussels and the importance of multiple characters and quantitative approaches to species delimitation.

Original languageEnglish (US)
Pages (from-to)182-192
Number of pages11
JournalMolecular Phylogenetics and Evolution
Volume138
DOIs
StatePublished - Sep 1 2019

Fingerprint

Unionidae
shell (molluscs)
Bivalvia
Fresh Water
mussels
Phenotype
taxonomy
phenotype
shell
artificial intelligence
phylogeny
Radiation
phylogenetics
testing
species diversity
new species

Keywords

  • Cryptic diversity
  • Machine-learning
  • Morphometrics
  • Species delimitation
  • Unionida

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

Cite this

@article{fe800dc40b7b40009c1bab58c3463fdd,
title = "Molecules and morphology reveal ‘new’ widespread North American freshwater mussel species (Bivalvia: Unionidae)",
abstract = "In the Family Unionidae, the greatest radiation of freshwater mussels, malacologists have been misled by extreme intraspecific shell variation and conversely interspecific conchological stasis or convergence. We characterized the genetic and morphological diversity of two phenotypes of Lampsilis teres from specimens (n = 108) collected across its distribution using geometric and traditional morphometrics and multilocus molecular phylogenetics to test the hypothesis that phenotypes represent separate species. Results from our morphometric and molecular phylogenetic analyses unanimously indicate that L. teres sensu lato is made up of two divergent, widespread species with overlapping distributions. We describe a new species and provide a revised description of L. teres sensu stricto. We use morphometrics and machine-learning classification algorithms to test if shell morphology alone can be used to discriminate between these species. Classification percentages of 97.02{\%} and 93.86{\%} demonstrate that shell morphology is highly informative for species identification. This study highlights our lack of understanding of species diversity of freshwater mussels and the importance of multiple characters and quantitative approaches to species delimitation.",
keywords = "Cryptic diversity, Machine-learning, Morphometrics, Species delimitation, Unionida",
author = "Keogh, {Sean M.} and Simons, {Andrew M}",
year = "2019",
month = "9",
day = "1",
doi = "10.1016/j.ympev.2019.05.029",
language = "English (US)",
volume = "138",
pages = "182--192",
journal = "Molecular Phylogenetics and Evolution",
issn = "1055-7903",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Molecules and morphology reveal ‘new’ widespread North American freshwater mussel species (Bivalvia

T2 - Unionidae)

AU - Keogh, Sean M.

AU - Simons, Andrew M

PY - 2019/9/1

Y1 - 2019/9/1

N2 - In the Family Unionidae, the greatest radiation of freshwater mussels, malacologists have been misled by extreme intraspecific shell variation and conversely interspecific conchological stasis or convergence. We characterized the genetic and morphological diversity of two phenotypes of Lampsilis teres from specimens (n = 108) collected across its distribution using geometric and traditional morphometrics and multilocus molecular phylogenetics to test the hypothesis that phenotypes represent separate species. Results from our morphometric and molecular phylogenetic analyses unanimously indicate that L. teres sensu lato is made up of two divergent, widespread species with overlapping distributions. We describe a new species and provide a revised description of L. teres sensu stricto. We use morphometrics and machine-learning classification algorithms to test if shell morphology alone can be used to discriminate between these species. Classification percentages of 97.02% and 93.86% demonstrate that shell morphology is highly informative for species identification. This study highlights our lack of understanding of species diversity of freshwater mussels and the importance of multiple characters and quantitative approaches to species delimitation.

AB - In the Family Unionidae, the greatest radiation of freshwater mussels, malacologists have been misled by extreme intraspecific shell variation and conversely interspecific conchological stasis or convergence. We characterized the genetic and morphological diversity of two phenotypes of Lampsilis teres from specimens (n = 108) collected across its distribution using geometric and traditional morphometrics and multilocus molecular phylogenetics to test the hypothesis that phenotypes represent separate species. Results from our morphometric and molecular phylogenetic analyses unanimously indicate that L. teres sensu lato is made up of two divergent, widespread species with overlapping distributions. We describe a new species and provide a revised description of L. teres sensu stricto. We use morphometrics and machine-learning classification algorithms to test if shell morphology alone can be used to discriminate between these species. Classification percentages of 97.02% and 93.86% demonstrate that shell morphology is highly informative for species identification. This study highlights our lack of understanding of species diversity of freshwater mussels and the importance of multiple characters and quantitative approaches to species delimitation.

KW - Cryptic diversity

KW - Machine-learning

KW - Morphometrics

KW - Species delimitation

KW - Unionida

UR - http://www.scopus.com/inward/record.url?scp=85066923135&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85066923135&partnerID=8YFLogxK

U2 - 10.1016/j.ympev.2019.05.029

DO - 10.1016/j.ympev.2019.05.029

M3 - Article

C2 - 31129350

AN - SCOPUS:85066923135

VL - 138

SP - 182

EP - 192

JO - Molecular Phylogenetics and Evolution

JF - Molecular Phylogenetics and Evolution

SN - 1055-7903

ER -