Thus it is clear that natural selection, unless aided by some other form of isolation, can give effect to only monotypic evolution.
It is easy to see how natural selection can bring about monotypic evolution, but how can it have effected polytypic evolution?
The only endemic for which the geographic history cannot be adequately explained is the monotypic Pityriasis gymnocephala.
Most of the species not studied are monotypic and have restricted geographic ranges.
The specializations of Thomomys, however, clearly preclude its reference to the tribe Dikkomyini; therefore, it is set apart in the monotypic tribe Thomomyini.
In the case of monotypic evolution by natural selection alone, intercrossing with the parent type is prevented through the gradual extinction of that type by successive generations of the developing type.
But the fact of this analogy being unsound does not affect the validity of the distinction between monotypic and polytypic evolution to which it led Darwin, in his later years, so clearly to express[33].
Fries thought so to treat the problem but was unable to keep faith with his own decision; for no sooner he states the genus monotypic than he proceeds forthwith to offer four varieties, a.
Colorado was described as a new species, and with some temerity perhaps, offered as a second species of the hitherto monotypic Leocarpus, all on account of the peculiar capillitium.
I have just thought that your remark about the much variation of monotypic genera was to show me that even in these, the smallest genera, there was much variability.
Defn: Having but one type; containing but one representative; as, a monotypic genus, which contains but one species.
In all, 27 kinds (subspecies and monotypic species) of the order Megachiroptera are known from the Solomon Islands.
Bats of this monotypic genus occur on Bougainville, Choiseul, Santa Ysabel, and Guadalcanal (see Fig.
Until more material from critical areas is available for study, I continue to recognize angustapalata as a monotypic species.
The synonymy of each monotypic species or subspecies begins with the name as given in the original description.
The tribe is very poorly represented in tropical Africa; one species Oxytenanthera abyssinica has a wide range, and three monotypic genera are endemic in western tropical Africa.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "monotypic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
