Clines: an Auxiliary Taxonomic Principle

  title={Clines: an Auxiliary Taxonomic Principle},
  author={Julian Sorell Huxley},
MODERN taxonomy, after a phase of 'splitting', adopted the integrating principle of geographical replacement, thus uniting numerous forms previously styled species as geographical races or subspecies of a polytypic species or Formenkreis1. It seems desirable, however, to go still further in the direction of synthesis. The naming and description of sub specific forms, however necessary, is not sufficient. Further, if not supplemented by some other method, it has two actual disadvantages–it… Expand
Distribution of the Colour Phases of the Fulmar (Fulmarus Glacialis)
The fulmar does not exhibit a simple ‘dimorph-ratio cline’, but shows a polymorphic one (first discussed by Eagle Clarke4), which seems, from the limited evidence available, to be of a rather complicated nature. Expand
Revising some terms of intra-specific differentiation
Some terms, universally used in botany and zoology, are rather vaguely defined, if at all, and have in common use become to such an extent ambiguous, that they need recurrent re-definitions to avoidExpand
Geographical variability in freshwater mollusks
Clinal variability is found for at least one species of a pond snail (Lymnaea terebra) when studying the proportions of its copulatory apparatus moving from south to north, and further studies of the geographical variation of the freshwater mollusks will allow one to conclude whether the geographical clines are truly adaptive. Expand
The importance of closely related taxa for the delimitation of phytosociological units
Closely related taxa used in the phytosociology will not show any new criteria for delimitation of vegetation units, but often increase the number of characteristic components and actual limits of a given unit become better documented and more ecological information will be gathered. Expand
Morphological and taxonomic studies on mammalian trypanosomes. VIII. Revision of Trypanosoma evansi.
It was shown that—as in the case of the Brucei group—the length distributions in polymorphic samples of T. evansi could be statistically resolved into distinct curves, corresponding to the three morphological components (stumpy, intermediate, slender). Expand
Long shadow of Linnaeus's human taxonomy
It has taken two and a half centuries to shed Linnaeus’s fallacy that the human species comes taxonomically organized into a few large, natural groups that are fairly homogeneous and fairly distinct from one another. Expand
On the Study of African Mammalia
In the course of some years study of the Northern Rhodesian mammal fauna it has become increasingly apparent how very much more there still is to learn, both in regard to taxonomy and distribution, to say nothing of ecology, which as yet can hardly be said to be in its infancy in central Africa. Expand
Population differentiation in a purported ring species, Acacia karroo (Mimosoideae)
It is confirmed that A. karroo maintains morphological differentiation even when there is substantial alteration of water and nutrient availability, as well as local adaptation of these genotypes to particular soil types. Expand
To be or not to be tchernovi: a taxonomic revision of the snake genus Micrelaps (Squamata: Serpentes), in Israel.
It is concluded that Levantine Micrelaps belongs to a single, morphologically variable, and genetically uniform species, Micrelap muelleri, of which M. tchernovi is a junior synonym. Expand
Acacia brevispica and acacia schweinfurthii in Africa, with particular reference to natal
Hunter, G. E. 1964. Ohromosome numbers in Vernonia: section Lepidoploa: subsection Paniculatae Verae. Southw. Na~. 9: 239-244. Jones, S. B., Jr. 1964a. Taxonomy of the narrow-leaved Vernonia of ~heExpand


  • F. B. Sumner
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1929
The interest of this case was enhanced by the probable phylogenetic relationship between the two races in question, and the subspecies polionotus, in view both of its geographic range and of its distinguishing characters, may be regarded as representing the ancestral stock. Expand
Geographic Distribution of Certain New England Mammals
With improved methods for intensive collecting, the knowledge particularly of the small mammals has increased a thousandfold, so that the data now at hand are vastly more ample than they were even fifty years ago. Expand
Evolution in mendelian populations
Page 108, last line of text, for "P/P″" read "P′/P″." Page 120, last line, for "δ v " read "δ y ." Page 123, line 10, for "4Nn" read "4Nu." Page 125, line 1, for "q" read "q." Page 126, line 12,Expand