Taxonomic status of some mice of the Peromyscus boylii group in eastern Mexico, with description of a new subspecies.
A taxonomic study of the middle American snake, Pituophis deppei.
Comments on the taxonomic status of Apodemus peninsulae, with description of a new subspecies from North China.
But the trouble would then be that, with this much conceded, the whole "phylogenic series" would tumble with it, and become only the taxonomic or classification series of that ancient world with which these fossil men were acquainted.
Surely these feats of time-acrobatics show the folly of arranging contemporaneous, taxonomic groups in single file and giving to each a time value.
I suppose there is no intergradation but in the absence of precise information, I choose not to modify the current taxonomic arrangement of E.
A taxonomic and evolutionary study of the pinon mouse, Peromyscus truei.
Taxonomic notes on Mexican bats of the Genus Rhogeessa.
In addition, attention is given to the probable center of origin of the subfamily Zapodinae and to the relationships and taxonomic positions of the genera Zapus, Napaeozapus, and Eozapus.
The width of a hair in the underfur is of no taxonomic significance, in that individual variation exceeds that between species.
The differences recorded are constant between the described groups and, therefore, are considered to be of taxonomic significance.
Some of the structures useful for separating taxonomic entities may have little or no biological significance to the animals in nature.
Nevertheless, each of the populations studied has characters which make this subspecies recognizable as a taxonomic unit, although its characters are not yet stabilized even in the central part of its range.
In summary: Only the head and body of the malleus and the short and long limbs and body of the incus are sufficiently consistent within a given group to be of taxonomic importance.
The general shape and dimensions of the baculum (os penis) provide characters of taxonomic value for the species of Zapus (see figs.
A taxonomic study of the Middle American snake Pituophis deppei, Univ.
A taxonomic study of the ratsnakes, genus Elaphe Fitzinger.
The taxonomic validity of Pseudoficimia pulcherrima remains doubtful, for only minor characters distinguish it from P.
A taxonomic study of the Middle American Snake, Pituophis deppei.
A taxonomic study of the cosmopolitan scincoid lizards of the genus Eumeces.
Taxonomic studies of the rattlesnakes of Mainland Mexico.
Myology and Serology of the Avian Family Fringillidae, a Taxonomic Study.
Few of the earlier studies were of a quantitative nature, but within the past decade, satisfactory quantitative serological techniques have been developed whereby taxonomic relationships may be estimated.
The use of serological techniques in taxonomic work has two main advantages.
The size and shape of the bill, for example, have been over-emphasized in the past as taxonomic characters.
Such features are often of utmost importance in distinguishing the higher taxonomic categories.
Because we can trace in the taxonomic series all the gradations from the one to the other.
By extensive comparison in the taxonomicand ontogenic series, the whole vertebrate structure in all its details in different animals may be shown to be modifications one of another.
By extensive comparison in the taxonomic and ontogenic series, all the intermediate gradations between these extreme modifications may be picked up.
We have taken only a few examples, but the same is undoubtedly true of allTaxonomic groups above species.
Here also the ontogenic is similar to the taxonomic series.
That the embryonic development of one of the higher representatives of any group repeated in a general way the terms of the Taxonomic series in the same group, and therefore that embryology furnished the key to a true classification; and, 2.
All taxonomic groups, except species, have undoubtedly become what we now see them by a gradual process, following the laws of evolution, and therefore presumably by a natural process of evolution.
There is no significant variability in the family, and this is more evidence of close taxonomic relationship between the members of the family.
Shufeldt (1889) states that the free lacrimal ossicle might be of some taxonomic importance in the passerines, since it is found in the generalized Corvids and in nestling Turdids.
A taxonomic and evolutionary study of the pinon mouse, Peromyscus truei.
This gives it an apparent prominence as compared with other bones of the skeleton, but it has no great taxonomic importance.
A taxonomic study of the cosmopolitan scincoid lizards of the genus Eumeces with an account of the distribution and relationships of its species.
How enormous, then, is the contrast between the first simple attempt at classification as made by the early Jews, and the elaborate body of abstract thought which is presented by the taxonomic science of to-day.
In my opinion, those who, like Weismann, consider all taxonomic characters adaptive, are equally mistaken with Bateson and his followers, who regard all characters as mutational.
If we consider fishes in general, we see that there is no evidence of any relation between many of the most important taxonomic characters and function or external conditions.
Indeed there is every reason to believe that almost countless numbers of our taxonomicspecies have originated from common ancestral originals.
The geological series is merely an old-time taxonomic series, a classification of the forms of life that used to live on the earth, and is of course just as artificial as any similar arrangement of the modern forms of life would be.
In short, we now know that our taxonomic classifications have been marked off on altogether too narrow lines.
So, too, the color of the bark is often of taxonomic importance.
From the time when botanists first commenced to work on the grape there has been a constant search for taxonomic characters for separating the various species clearly and distinctly.
This description is brief and includes many characters of no taxonomic value.
There are, however, several characters of Vitis which have great taxonomic importance.
The presence or absence of the diaphragm and its thickness are of taxonomic value.
Myology and serology of the Avian Family Fringillidae, a taxonomic study.
Taxonomic resemblance between the faunas from the Sierra San Carlos and the Sierra de Tamaulipas amounts to only 16.
A taxonomicrevision of the spotted skunks (Genus Spilogale).
The taxonomic status of the Corynorhinus phyllotis G.
The fauna of the Sierra de Tamaulipas has a greater taxonomic resemblance (20.
A taxonomicreview of the American long-tailed shrews (Genus Sorex and Microsorex).
For the taxonomic status of this species in North America see Jones and Alvarez (1962).
Because the species are not arranged in taxonomic order in this field guide, the page of the synoptic account of each is provided in the column to the right.
The facts are that a criticaltaxonomic study of the American specimens of the subgenus Stenocranius is required in order to ascertain the geographic variation.
In view of the taxonomic treatment accorded by Bole and Moulthrop (Sci.
Taxonomic notes on some Mexican and Central American hylid frogs.
