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Merriam's kangaroo rat (Dipodomys merriami) is a species of rodent in the family Heteromyidae. [2] The species name commemorates Clinton Hart Merriam . It is found in the Upper and Lower Sonoran life zones of the southwestern United States , Baja California , and northern Mexico .
Kangaroo rats, small mostly nocturnal rodents of genus Dipodomys, are native to arid areas of western North America.The common name derives from their bipedal form. They hop in a manner similar to the much larger kangaroo, but developed this mode of locomotion independently, like several other clades of rodents (e.g., dipodids and hopping mice).
Heteromyidae is a family of rodents consisting of kangaroo rats, kangaroo mice, pocket mice and spiny pocket mice.Most heteromyids live in complex burrows within the deserts and grasslands of western North America, though species within the genus Heteromys are also found in forests and their range extends as far south as northern South America.
Common species of mammals found on the refuge include: desert cottontail, Merriam's kangaroo rat, muskrat, raccoon, valley pocket gopher, striped skunk, coyote, bobcat, round-tailed ground squirrel, desert pocket mouse and various bat species. Visibility varies greatly from species to species due to the nocturnal habits of some and seasonal ...
The San Bernardino kangaroo rat follows the same body plan as Dipodomys merriami and other kangaroo rat species: large hind feet for jumping, long tail for balance while jumping, cheek pouches for foraging, and so on. Its body is about 95 millimeters (3.7 inches) long, with a total length of 230–235 mm (9.1–9.3 in).
Dipodomyinae is the sister group of a Perognathinae-Heteromyinae clade; the two are estimated to have split about 22-24 million years ago.The most recent common ancestor of extant dipodomyines is thought to have lived 15-16 Ma ago, when the two genera split.
Dipodomys ornatus, commonly known as the ornate kangaroo rat or plateau kangaroo rat, is a species of kangaroo rat in the family Heteromyidae.Found in Mexico, Dipodmys ornatus was originally thought to be a subspecies of Phillips's kangaroo rat, D. phillipsi, and was described as such in 1894 by Clinton Hart Merriam.
Merriam's ground squirrel: Urocitellus canus: Sciuridae Columbian ground squirrel: Urocitellus columbianus: Sciuridae Wyoming ground squirrel: Urocitellus elegans: Sciuridae Chisel-toothed kangaroo rat: Dipodomys microps: Heteromyidae Ord's kangaroo rat: Dipodomys ordii: Heteromyidae Dark kangaroo mouse: Microdipodops megacephalus: Heteromyidae ...