Phylogeographic Structure and Color Pattern Variation among Populations of Plethodon albagula on the Edwards Plateau of Central Texas

Baird, Amy B.; Krejca, Jean K.; Reddell, James R.; Peden, Colin; Mahoney, Meredith J.; Hillis, David M.

doi:10.1643/0045-8511(2006)6[760:psacpv]2.0.co;2

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…Furthermore, genetic distances among clades (10.6% mtDNA, 1.1% nucDNA) are greater than other salamanders recognized as distinct species (e.g. Baird et al., ; Martínez‐Solano et al., ; Parra‐Olea, García‐París & Wake, ). Caution is needed when delimiting species based on the multispecies coalescent (Sukumaran & Knowles, ), however, support for strong levels of genetic isolation, mito‐nuclear concordance and deeper divergences than other plethodontids recognized as distinct species.…”

Section: Discussionmentioning

confidence: 90%

Hydrologic and geologic history of the Ozark Plateau drive phylogenomic patterns in a cave‐obligate salamander

Phillips

Fenolio

Emel

et al. 2017

Journal of Biogeography

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Aim: Habitat specialization can constrain patterns of dispersal and drive allopatric speciation in organisms with limited dispersal ability. Herein, we tested biogeographic patterns and dispersal in a salamander with surface-dwelling larvae and obligate cave-dwelling adults.Location: Ozark Plateau, eastern North America. Methods:A population-level phylogeny of grotto salamanders (Eurycea spelaea complex) was reconstructed using mitochondrial (mtDNA) and multi-locus nuclear DNA (nucDNA), primarily derived from anchored hybrid enrichment (AHE). We tested patterns of molecular variance among populations and associations between genetic distance and geographic features. Results: Divergence time estimates suggest rapid formation of three major lineages in the Middle Miocene. Contemporary gene flow among divergent lineages appears negligible, and mtDNA suggests that most populations are isolated. There is a significant association between phylogenetic distance and palaeodrainages, contemporary drainages and sub-plateaus of the Ozarks, as all features explain a proportion of genetic variation. However, the greatest proportion of genetic variation is explained by the combined effects of palaeodrainages and sub-plateaus.Main conclusions: The geologic and hydrologic history of the Ozark Plateau has influenced lineage diversification in the grotto salamander, leading to genetic isolation among populations. Limited gene flow and strong phylogeographic structure in this complex may result from the restriction of highly specialized adults to caves.

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Section: Discussionmentioning

confidence: 90%

Hydrologic and geologic history of the Ozark Plateau drive phylogenomic patterns in a cave‐obligate salamander

Phillips

Fenolio

Emel

et al. 2017

Journal of Biogeography

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“…Colour pattern variation has been studied in other salamander species, mostly as intraspecific polymorphisms (e.g. Baird et al . 2006; Wake 2006; McKnight & Nelson 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Colour pattern variation has been studied in other salamander species, mostly as intraspecific polymorphisms (e.g. Baird et al 2006;Wake 2006;McKnight & Nelson 2007). There are fewer documented instances of interspecific homoplasy of external colouration.…”

Section: Colour Pattern Evolutionmentioning

confidence: 99%

Homoplastic evolution of external colouration in Asian stout newts (Pachytriton) inferred from molecular phylogeny

Wu¹,

Wang²,

Jiang³

et al. 2009

Zoologica Scripta

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Hanken, J. (2010). Homoplastic evolution of external colouration in Asian stout newts (Pachytriton) inferred from molecular phylogeny.-Zoologica Scripta, 39, 9-22. The Asian stout newts of the genus Pachytriton (Salamandridae) inhabit montane streams in south-eastern China. Despite their abundance in the pet trade, the phylogeny and systematics of this genus are poorly understood. Colouration is often used to delimit species under the assumption that consistent chromatic differences characterize independent evolutionary lineages. We present the first phylogenetic study of Pachytriton that incorporates 2.35 kb of mitochondrial DNA (ND2, cytb) and 1.2 kb of nuclear sequence data (RAG-1) along with morphometric characters to infer evolutionary relationships and patterns of colour evolution among the three described species: Pachytriton brevipes, Pachytriton labiatus and Pachytriton archospotus. Our results support the monophyly of Pachytriton and recover P. archospotus as the sister taxon to P. brevipes. Monophyly of P. labiatus is significantly rejected: south-western populations are sister to the group of P. brevipes plus P. archospotus, whereas north-eastern populations nest with P. brevipes. The two geographic units are further separated by multivariate morphological analyses. South-western P. labiatus is the type species; misidentification of north-eastern populations as P. labiatus results from their similar colouration. An unspotted, dark brown dorsum is the likely ancestral state for the genus, whereas black-spotted colouration characterized the common ancestor of P. brevipes, P. archospotus, and north-eastern P. labiatus and was secondarily lost in the latter group. Homoplastic evolution and intraspecific variation render colour pattern in Pachytriton an unreliable character for delimiting species boundaries. North-eastern populations of P. labiatus are declining as the result of human collection and habitat destruction and are in urgent need of conservation protection.

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“…Barcoding has proved valuable in many applications, such as identifying larval life stages and associating them with adult forms, rapid forensic identification of species, and environmental-DNA applications. Unfortunately, the deep divergences of mtDNA gene trees within many species of reptiles and amphibians (e.g., Burbrink et al, 2000;Zamudio and Savage, 2003;Baird et al, 2006;Ruane et al, 2014), as well as the propensity of mtDNA to introgress across species boundaries, severely limits its use in robust species delimitation, unless it is combined with information from other sources. In addition, the move from allozyme studies to mtDNA studies was often accompanied by a shift from population-level sampling to sampling one or a few individuals per locality.…”

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confidence: 99%

Species Delimitation in Herpetology

Hillis

2019

Journal of Herpetology

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118

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Phylogeographic Structure and Color Pattern Variation among Populations of Plethodon albagula on the Edwards Plateau of Central Texas

Cited by 10 publications

References 14 publications

Hydrologic and geologic history of the Ozark Plateau drive phylogenomic patterns in a cave‐obligate salamander

Hydrologic and geologic history of the Ozark Plateau drive phylogenomic patterns in a cave‐obligate salamander

Homoplastic evolution of external colouration in Asian stout newts (Pachytriton) inferred from molecular phylogeny

Species Delimitation in Herpetology

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