...From this point to the Isthmus of Panama the coast isagain rocky... 
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...A distributional study of the amphibians of the Isthmus of Tehuantepec, México...
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...A distributional study of the amphibians of the isthmus ofTehuantepec, Mexico...
Sydney Anderson 「Mammals of Mesa Verde National Park, Colorado」
...Before World War II the isthmus could be reachedreadily only by railroad or by ocean vessel to Salina Cruz orCoatzacoalcos...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Originally I intended to study the entire herpetofauna of the isthmus...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...I first visited the Isthmus of Tehuantepec and collected on the Pacificlowlands of the isthmus in July, 1955...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Thompson on a trip across the isthmus in December,1955 (University of Michigan Museum of Zoology), by the University ofKansas Museum of Natural History field party under the direction ofRollin H...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...The three divisions of the isthmus recognized in the account of thephysiography serve equally well in describing the vegetation...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...The amphibian fauna of the lowlands of the Isthmus of Tehuantepecconsists of 36 species definitely recorded from the area...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Thus, therainforests of the isthmus are characterized by a much higher relativehumidity than are the savannas or semi-arid scrub forests...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Four of these (Eleutherodactylus alfredi,Syrrhophus leprus, Hyla loquax, and Hyla picta) live in the Gulflowlands to the east and to the west of the isthmus...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Two ofthese (Bufo coccifer and Syrrhophus pipilans) range to the east andto the west of the isthmus on the Pacific lowlands...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...To these wide-rangingspecies the diversified environments of the isthmus do not present abarrier to distribution...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Durham, Arellano, and Peck (1952), Olsonand McGrew (1941), and Stirton (1954) have provided geological evidencethat there probably was no Cenozoic seaway in the Isthmus ofTehuantepec...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Even at this relatively late date such animals as Lineatritonlineola, Anotheca coronata, and Phyllomedusa moreleti could havecrossed the isthmus...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...At those times animals now inhabiting the rainforestsof the Gulf lowlands and those inhabiting the Pacific lowlands ofChiapas and Guatemala could have crossed the isthmus...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Even though many populations areisolated from other populations of the same species in the lowlands ofthe isthmus, there is no apparent speciation...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Consequently, its distribution in the isthmus isdiscontinuous...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...In the isthmus this species can be distinguishedfrom Eleutherodactylus rugulosus by less rugose skin on the dorsumand absence of dark ventral mottling...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
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extinguishing overlaps deficiencies
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