(November 16, 2018 at 11:43 pm)Everena Wrote:Wrong again! The article you cited only called into question SOME examples of ring species. There have been plenty of confirmed examples of ring species, to wit:(November 16, 2018 at 10:11 pm)Gwaithmir Wrote: Wrong! I've given you the scientific study and citation. It is irrefutable proof of speciation. You are ignorant and in denial. Grow up!
It could be adaption. And the ring series was proven to not exist... by others in evol bio https://whyevolutionistrue.wordpress.com...g-species/
Evolutionary Relationships Within the Ensatina Eschscholtzii Complex Confirm the Ring Species Interpretation
Craig Moritz
1University of QueenslandQueensland 4072, Australia
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Craig Moritz
Christopher J. Schneider
2University of CaliforniaBerkeley, California 94720, USA
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Christopher J. Schneider
David B. Wake
3University of CaliforniaBerkeley, California 94720, USA
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David B. Wake
Systematic Biology, Volume 41, Issue 3, 1 September 1992, Pages 273–291, https://doi.org/10.1093/sysbio/41.3.273
Abstract
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 evident within the subspecies platensis and oregonensis. The phylogenetic hypothesis of minimum length that is best supported by the data contains one monophyletic group that includes populations from the southern Sierra Nevada and mountains of southern California (croceater, klauberi, and southern platensis) and another that includes populations of the southern and central coastal regions (xanthoptica and eschscholtzii) Samples of oregonensis were typically basal, but their precise branching order was unstable. Both oregonensis and platensis were paraphyletic, with several disparate lineages in oregonensis and a strong northsouth dichotomy in platensis. The data were incompatible with a biogeographic model that required all subspecies to be monophyletic but were compatible with slightly modified predictions of a model assuming stepwise colonizations from north to south down the Sierra Nevada and independently down the coastal ranges. These features provide strong support for the biogeographic scenario central to the interpretation of Ensatina eschscholtzii as a ring species. Division of this complex into separate species on the basis of the observed patterns of monophyly for mitochondrial DNA (mtDNA) is unwarranted because further sampling could reveal additional instances of paraphyly across subspecies and, more generally, because mtDNA alone should not be used to infer species boundaries.
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I can find plenty more peer reviewed findings from legitimate scientific journals. You can find them too if you have the intellectual integrity for an honest pursuit of the truth.
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