_) set forth as distinguishing _muralis_ from other named kinds are readily apparent and, like Goldman, we see no evidence of intergradation. [Please select]
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Consequently it is unlikely that intergradation with other populations could exist at the present time. [Please select]
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1), but no evidence of intergradation between these two subspecies could be ascertained. [Please select]
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More collecting is necessary for an understanding of the distribution and intergradation of these subspecies in Coahuila. [Please select]
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These specimens of the Ladder-backed Woodpecker show signs of intergradation with _D. [Please select]
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This suggestion of intergradation is not unexpected because _symplectus_ occurs in northeastern Coahuila and _cactophilus_ in the Chisos Mountains of Texas. [Please select]
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