...By utilizingthe combination of many morphological and biological factors, thegenus Smilisca can be defined reasonably well as a natural, phyleticassemblage of species...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...The four are here afforded species rank since morphological similarityand allopatry are not sufficient grounds for the assumption of geneticexchange...
John D. Lynch 「A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope」
...Our small samples of birds and reptiles from the island show nodetectable morphological differentiation from adjacent populations...
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...stylifer, the turkey louse) is of greatinterest from a morphological and developmental point of view, as theantennæ are described and figured by Denny as being "in the malescheliform (Fig...
Alpheus Spring Packard 「Our Common Insects」
...pacificus, and in addition the morphological differentiation was notso great...
James S. Findley 「Speciation of the Wandering Shrew」
...Such similarities of craniabetween Calomys and Baiomys may reflect convergence, but thetotal of internal and external morphological characters shared, Ithink reflects true relationships...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...Therefore, populations of pygmy mice occurringto the south in central México might be expected to maintaina relatively high degree of heterozygosity in morphological andbehavioral characters...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...taylori, are seeminglyderived from a common ancestor that in morphological structurewas intermediate between B...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...In spite of itsrelatively high degree of morphological specialization, T...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...They have, however, only a physiological, not a morphological,importance; they have no direct influence on the formation of the fœtus...
Ernst Haeckel 「The Evolution of Man」
...These morphological facts are in perfect harmony with the familiarphysiological truth that the child inherits from both parents, and that on theaverage they are equally distributed...
Ernst Haeckel 「The Evolution of Man」
...At this stage man is a higher vertebrate, but shows noessential morphological difference from the embryos of the mammals, the birds,the reptiles, etc...
Ernst Haeckel 「The Evolution of Man」
...We shall see presently how thisconclusion is justified in the present condition of morphological science...
Ernst Haeckel 「The Evolution of Man」
...He showed convincingly that the ideas of hand andfoot had been wrongly defined, and had been improperly based on physiologicalinstead of morphological grounds...
Ernst Haeckel 「The Evolution of Man」
...278–282); and still greater is the morphological distance between theseand the lowest apes (the Cynopitheca)...
Ernst Haeckel 「The Evolution of Man」
...These feathers are different from any whichI have been able to find attached to the bodies of birds, and are thusidentified from morphological rather than from other reasons...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
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