12/16/2023 0 Comments Great basin pocket mouse statesapache may occasionally be found in lower woodland flavescens from the eastern grasslands and P. Perognathus flavescens may actually consist of two species ( Frey Of Perognathus are similar in appearance for the most part. Rostral area of a Dipodomys skull showing the grooved upper incisors and the infraorbital foramen on the side of the rostrum typical of heteromyids. Shrubs as well as in shrubby habitats Chaetodipus (other than the Hispid Pocket Mouse) tends to be limited to shrubby areas.įig. The silky pocket mice tend to occur in grassy areas without The kangaroo rats, which tend to rely more on fewer kinds and on clusters of seeds assembled by the wind in depressions or shrubbery. They tend to rely more on individual finds of seeds lying on the surface or shallowly buried than The pocket mice are primarily seed eaters and generally feed on a variety of kinds. Smaller species having daily torpidity), slowing metabolism.Īll of our heteromyids have grooved upper incisors, and the infraorbital foramen is on the size of the rostrum. The pocket mice also appear to go into a torpid state easily (some of the During the day, they are in relatively cool, moist burrows, often with openings blocked. Activity is limited mostly to nocturnal and crepuscular times, when the relative Special nasal tissues moisten the incoming air during exhalation, these tissues absorb much of the moisture). Extended nasals allow condensation of moisture during exhalation, reducing respiratory loss (incidentally, camels have carried this to a fine art-during inhalation, All appear to have kidneys able to concentrate urine to the point where, if necessary, they can subsist on water gained This group of rodents are well fitted for xeric conditions. Smithsonian Field Guide, Animal Diversity Web. Harsh hair and weak spiny bristles on the rump. Identification, as it now stands, Perognathus includes what may be called the silky pocket mice, with relatively fine hairs making up the pelage, while Chaetodipus includes forms with Only the first and last groups are within our area (kangaroo mice areīasically Great Basin animals, and spiny pocket mice are southern taxa reaching only as far north as the lowermost reaches of the Rio Grande Valley in Texas and almost north to theĪ taxonomic change in recent years has been the elevation of the subgenus Chaetodipus of the genus Perognathus to the generic level. Included in the Heteromyidae are pocket mice, kangaroo mice, spiny pocket mice, and kangaroo rats. Similarities in teeth and some skull structures. Characters uniting the taxa include not only the presence of external, fur-lined cheek pouches, but also basic The Geomyoidea, consisting of the Geomyidae and Heteromyidae, is a New World taxon. Heteromyidae Heteromyidae-Pocket Mice and Kangaroo Rats
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