EVOLUTIONARY RELATIONSHIPS WITHIN THE ENSATINA ESCHSCHOLTZII COMPLEX CONFIRM THE RING SPECIES INTERPRETATION

@article{Moritz1992EVOLUTIONARYRW,
  title={EVOLUTIONARY RELATIONSHIPS WITHIN THE ENSATINA ESCHSCHOLTZII COMPLEX CONFIRM THE RING SPECIES INTERPRETATION},
  author={Craig C Moritz and Christopher J. Schneider and David B. Wake},
  journal={Systematic Biology},
  year={1992},
  volume={41},
  pages={273-291}
}
Sequences (644-681 bp) from the mitochondrial cytochrome b gene were obtained for 24 individuals representing the geographic range and morphological diversity of the polytypic salamander ring species Ensatina eschscholtzii. These data were used to estimate the phylogeny of components of the ring to test the biogeographic scenario underlying current interpretations of speciation in this complex. The analysis revealed high levels of nucleotide variation among subspecies. Strong subdivision was… 

Figures and Tables from this paper

Pre-pleistocene refugia and differentiation between populations of the caucasian salamander (Mertensiella caucasica).

A 350-bp fragment of the mitochondrial cytochrome-b gene was sequenced in the Caucasian salamander, Mertensiella caucasica, representing 10 populations from across its range along the Black Sea coast, showing parallel patterns in body proportions and coloration patterns.

Molecular systematics of short-horned lizards: biogeography and taxonomy of a widespread species complex.

High levels of genetic variation found in population comparisons are in accord with high levels of morphological variation in this species group; however, only in the Pacific Northwest region is there spatial congruence between these phylogenetic results and subspecific ranges based on previous morphological studies.

THE POLYTYPIC SPECIES REVISITED: GENETIC DIFFERENTIATION AND MOLECULAR PHYLOGENETICS OF THE TIGER SALAMANDER AMBYSTOMA TIGRINUM (AMPHIBIA: CAUDATA) COMPLEX

A phylogenetic analysis of the Ambystoma tigrinum complex is presented, based on approximately 840 base pairs of mitochondrial‐DNA sequence from the rapidly evolving D‐loop and an adjacent intron, which suggests that these eight lineages diverged during a period of rapid cladogenesis.

Phylogeographic variation of the Karoo bush rat, Otomys unisulcatus : a molecular and morphological perspective

A fragment of the cytochrome b mitochondrial DNA gene of a plains-dwelling species, Otomys unisulcatus, was sequenced and analysed, and two closely related geographic assemblages were found.

A mitochondrial DNA perspective on the evolution of Iberian Discoglossus (Amphibia: Anura)

Results from the inferred phylogenetic branching pattern and the sequence divergence among species and populations support the following: the two endemic species from Iberia, D. galganoi and D. jeanneae are sister taxa and are reciprocally monophyletic with respect to their mtDNA; the geographic distribution of these two morphologically cryptic species differs considerably from previous expectations.

Molecular systematics and phylogeography of the Plethodon elongatus species group: combining phylogenetic and population genetic methods to investigate species history

Phylogenetic relationships among haplotype groups differ in separate analyses of the genes but converge on a well‐supported topology, with P. elongatus and P. stormi as monophyletic sister taxa, in combined Maximum Parsimony and Maximum Likelihood analyses.

PHYLOGEOGRAPHY OF THE CALIFORNIA THRASHER (TOXOSTOMA REDIVIVUM) BASED ON NESTED-CLADE ANALYSIS OF MITOCHONDRIAL-DNA VARIATION

Inferences resulting from nested clade analysis suggest a history that includes past fragmentation, range expansion, and isolation-by-distance for California Thrasher populations, and many conclusions drawn are concordant with geologic data as well as phylogeographic scenarios drawn for other codistributed California taxa.

Molecular evidence for cryptic candidate species in Iberian Pelodytes (Anura, Pelodytidae).

Lineage diversification on an evolving landscape: phylogeography of the California newt, Taricha torosa (Caudata: Salamandridae)

Using mitochondrial cytochrome b sequences and starch gel electrophoresis to examine the phylogeographical history of 39 populations of the California newt, Taricha torosa, found that genetically differentiated groups were identified along coastal California, in southern California, and in the southern Sierra Nevada.
...

References

SHOWING 1-10 OF 35 REFERENCES

GEOGRAPHIC VARIATION IN ALLOZYMES IN A “RING SPECIES,” THE PLETHODONTID SALAMANDER ENSATINA ESCHSCHOLTZII OF WESTERN NORTH AMERICA

Little evidence of gene exchange around the ring of populations and sampling of many additional populations in regions between populations sampled thus far will be required to determine whether smooth intergradation occurs, although genetic distances measured exceed those between some co‐occurring species of plethodontid salamanders.

A MOLECULAR PHYLOGENETIC PERSPECTIVE ON THE ORIGINS OF MORPHOLOGICAL NOVELTIES IN THE SALAMANDERS OF THE TRIBE PLETHODONTINI (AMPHIBIA, PLETHODONTIDAE)

A "sequential species analysis" of species-rich genera or groups of related genera is suggested, in which the end forms demonstrate a large difference in morphology or other features and which contain enough species to illustrate intermediate stages, to determine whether such a summation of small steps provides a plausible explanation of macroevolution.

GENE TREES AND ORGANISMAL HISTORIES: A PHYLOGENETIC APPROACH TO POPULATION BIOLOGY

  • J. Avise
  • Biology
    Evolution; international journal of organic evolution
  • 1989
Preliminary extensions of the “gene tree” methodology to haplotypes of nuclear genes demonstrate that the phylogenetic perspective can also help to illuminate molecular‐genetic processes (such as recombination or gene conversion), as well as contribute to knowledge of the origin, age, and molecular basis of particular adaptations.

EVIDENCE FOR HYBRIDIZATION BETWEEN THE BLOTCHED AND UNBLOTCHED SUBSPECIES OF THE SALAMANDER ENSATINA ESCHSCHOLTZI

Until now the blotched and the unblotched subspecies of the plethodontid salamander, Ensatina eschscholtzi, were presumed reproductively isolated and sympatric in southern California, but the evidence has been negative and inconclusive.

INTRASPECIFIC SYMPATRY IN THE LUNGLESS SALAMANDER EN SATIN A ESCHSCHOLTZI

The concept of speciation through the what is regarded as inadequate evidence accumulation of small heritable changes for a species level of relationship between which ultimately lead to reproductive

Dynamics of mitochondrial DNA evolution in animals: amplification and sequencing with conserved primers.

The polymerase chain reaction is used to amplify homologous segments of mtDNA from more than 100 animal species, including mammals, birds, amphibians, fishes, and some invertebrates, and the unexpectedly wide taxonomic utility of these primers offers opportunities for phylogenetic and population research.

Flow of mitochondrial DNA across a species boundary.

Restriction analysis shows that wild Scandinavian mice belonging to the species Mus musculus contain the mitochondrial DNA of a neighboring species, M. domesticus, andylogenetic analysis of the restriction maps suggests that the mitochondrial DNAs found in Scandinavian M. musculus could stem from a single M. Domesticus female.

Species in concept and practice : herpetological applications

It is argued that the entities whose names should be placed in the Linnaean species category can be either largest recovered biparental lineages or uniparental tokogenetic arrays, and that any method used for the identification of species is bound to fail with some frequency.

Comparative osteology of the plethodontid salamander genus Aneides

  • D. Wake
  • Biology
    Journal of morphology
  • 1963
This report is an attempt to present information concerning osteological variation within the species of Aneides, to make detailed osteological comparisons of the species, and to compare the genus with closely related genera.