Speciation

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Speciation
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Speciation nearing completion? Northwest
Arizona Aspidoscelis tigris
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Sample 4 in the middle of a step
cline. Phenotypically intermediate. Why?
center
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Assortative mating?
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Speciation problem
Aspidoscelis carmenensis
A. picta
A. danheimae
A. hyperythra Puerto Escondido Loreto
A. franciscensis
A. espiritensis
A. hyperythra Migrino
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(No Transcript)
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Grismer, L. Lee. 1999. Phylogeny, taxonomy, and
biogeography of Cnemidophorus hyperythrus and C.
ceralbensis (Squamata Teiidae) In Baja
California, Mexico
Unresolved maybe not species?
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241 specimens scored for 7 phenotypic
characters Canonical variate analysis (pair-wise
F-values) Pair-wise F-values converted to
Mahalanobis distances (D2) Additive tree
constructed from a matrix of D2