The genus Crocodilus has become the order Crocodilia; the subgenera Alligatores, &c.
The recent species of the order Crocodilia are divisible into three families, which correspond with the original subgenera of Cuvier, and may be termed the Alligatoridae, the Crocodilidae, and the Gavialidae.
Map showing the distribution of the twosubgenera of the genus Proechimys.
Occlusal views of the upper left and lower right molariform teeth of the twosubgenera of the genus Proechimys.
The speciation in both subgenera finally resulted from gradual differentiation of varying populations since they show combinations of the generic biotypes and possess few truly qualitative characters.
Second left upper molar of the two subgenera Proechimys and Trinomys.
It is a matter of common sense to admit the two groups considered above as subgenera rather than genera.
Hyoids of both species of Baiomys are smaller than hyoids of all subgenera of Peromyscus.
In the past it has been customary to recognize two or more subgenera of the genus Lepus.
Some species can be placed in each of two subgenera with almost equal propriety.
Before the subgenera under Agaricus were promoted to full generic standing it was customary to state the name of a species thus: Agaricus (Psalliota) campester.
In Volvaria, Pluteus and most of Clitopilus, the spores are regular in shape, as in the white-spored series, in the rest of the subgenera they are generally angular and irregular.
Old Agaricus included manysubgenera and consequently many more species.
Lunatia/ and /Neverita/ have become subgenera of /Polynices/.
Some of these subgenera are usually accepted at full generic value, and their substitution for the old, well-established name /Murex/ is to be expected.
If the number of species increases much, these two subgenera may be separated into two genera: Chitonastrella corresponding to the former, Chitonastromma to the latter.
Both subgenera may perhaps be better separated as genera.
Therefore it appears more natural to give to all these different forms only the value of subgenera of Porodiscus, as I have already proposed in my Prodromus (1881, p.
But as these differences are rather inconstant and not sharply discernible, I think it now better to regard these three forms as subgenera of Spongodiscus.
Key to the Subgenera of Thomomys A Molars sub-crescent or ovate in cross-section, not becoming abruptly narrower at one end of tooth.
Key to the Subgenera of Pappogeomys A Enamel plates completely developed across posterior walls of M1 and M2, except in one species (P.
However, neither genera nor subgenera of the tribe Geomyini can be distinguished on the basis of their inferior dentitions.
Drawings illustrating enamel patterns characteristic of Geomys and Pappogeomys (including the subgenera Pappogeomys and Cratogeomys).
Key to the Subgenera of Orthogeomys A Frontal wide and greatly inflated; no interorbital constriction; enamel plate on posterior wall of P4 usually absent, although sometimes having small plate, restricted to lingual end of wall.
Drawings illustrating enamel patterns characteristic of Pliogeomys, Zygogeomys, and the subgenera of Orthogeomys (Orthogeomys, Heterogeomys and Macrogeomys).
A revision of the genus is needed; it might show that the currently recognized subgenera are artificial, and that a different arrangement of the species would more clearly express their evolutionary relationships.
The dolichocephalic features are more sharply defined in the subgenera Orthogeomys and Macrogeomys, and are less developed in the subgenus Heterogeomys.
Examination of these modern species would not radically change the estimation of the degree of phyletic development of the genera and subgenera involved.
The greater authorities have as a rule preferred larger genera, others of late have elevated innumerablesubgenera to the rank of genera.
Of the genus Microtus in North America, all subgenera but Orthriomys and all species but the following nine, have been studied: M.
They did not state specifically the basis for this point of view, but mention the fact that these two subgenera (Pitymys and Pedomys) closely resemble each other cranially.
Microtus of other subgenera having this type of baculum include M.
Pending further studies of the possible polyphyletic origin of other subgenera of the genus Microtus, I refer both M.
The volva is a feature of great importance in the study of the Agaricini, of the subgenera Amanita, Volvaria, etc.
Having raised the old subgenera of Fries to generic rank, Saccardo found it necessary to limit the application of the term Agaricus to the group of fungi to which it was originally applied by Linnaeus, viz.
Critical examination of new and old evidence reveals, nevertheless, that the subgenera Eutamias and Neotamias of the genus Eutamias are more closely related to one another than either is to the genus Tamias.
Howell's (1929) arrangement of the genera and subgenera of chipmunks is judged to be correct as indicated by the following arrangement that I propose.
The subgenera Eutamias and Neotamias are valid, for, Eutamias sibiricus differs from all the species of the subgenus Neotamias to a greater degree than these species differ from one another.
Before presenting new evidence and a review of older evidence bearing on the problem, it seems desirable to review briefly in chronological order, the taxonomic history of the genera and subgenera of the chipmunks.
The subgenera Eutamias and Neotamias are closely related.
Indications are that the divergence of the twosubgenera occurred, geologically, but a short time ago, possibly in Pleistocene time.
The subgenus Eutamias occurs on the Asiatic side and the subgenus Neotamias occurs on the North American side of Bering Strait, yet the two subgenera agree in the ten features referred to.
Different subgenera may be distinguished in Calpophaena according either to the number of the feet or to their shape (being simple or branched).
According to the varying number of the tubes we may distinguish the following five subgenera (corresponding to those of Cannobotrys), viz.
Phormobotrys, different subgenera may be distinguished, according to the different number and disposition of the radial tubes which become developed from the lobate cephalis.
Corresponding to the number of the ribs, we may distinguish as subgenera (separate genera in my Prodromus, 1881, p.
In the majority of species the feet are very long, curved, and armed in a very various manner, so that four subgenera may be distinguished, according to the armatures.
These subgenerahave important relations to the corresponding genera of Zygospyrida.
The distal ends of the radial tubes exhibit in the Aulacanthida the greatest variety in the production of different branches and capturing apparatus, and this serves for the distinction of the genera and subgenera here described.
It is singular that every one of the subgenera of Fries is represented, though the number of species in one or two is greatly predominant.
The number of Agaricini, for instance, is large, and amongst the twenty-eight subgenera into which the genus Agaricus is divided, eight only are unrepresented.
The subgenera Otisorex and Sorex probably separated in early Pleistocene or late Pliocene.
Even Potts's monograph I have been unable to follow without divergence, for it seems to me necessary to recognize several genera and subgenera that he ignored.
With one exception (that of Pectispongilla, which has only been found in Southern India) these genera have a wide distribution over the earth's surface, and this is also the case as regards the subgenera of Spongilla.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "subgenera" in a variety of sentences. We hope that you will now be able to make sentences using this word.
