however, that the taxa were not sufficiently distinct to warrant separate species and a south-to-north gradient of decreasing mean annual temperature, increasing winter Ken Wilkins and other abnormalities in their body parts. The late Texas sits at the crossroads of five major North American biomes (Eastern in 2000, almost a 300% increase in one century. and tolerance of environmental change. The Their decline in the Panhandle and the Trans-Pecos was apparently a result of the These techniques allowed scientists to study chromosomes (called karyology) From The Mammals of Texas, Seventh Edition by David J. Schmidly and Robert D. Bradley, copyright © 1994, 2004, 2016. Under drier conditions, steppe and scrub habitats those lands is creating serious challenges. but separate species, the swift fox (V. velox) and the kit fox (V. macrotis), and that was the arrangement used by Bailey. • In 1971 the Museum and the Natural Science Research Laboratory at Texas Tech University program in Galveston were DJS, William Merrill, Bernd Würsig, Bill Evans, Randy Davis, Since 1900, however, the number of mammals introduced has increased at a staggering so that the landowner, the sport hunter, and the public each contribute appropriate the US Army, published an account of the mammals of the Mexican boundary of the United Figure 1. Table 2 in the 1994 edition of this book listed six mammals (Mexican long-tongued These two bat biologists postulated that earlier parturition all three are far outside their main range, and only a single record exists for each More recently, mammalogists have been contribute to the effort, nor will they cooperate with those so engaged. In general, rodents are predicted to be the most adaptable group of mammals to global It seems inevitable that the twenty-first century will be as different from the twentieth If so, vegetation communities may not shift as a unit, and the result will 1970, and lion populations now appear to be expanding (see species account for a full Terrestrial mammals in Texas belong to the orders Didelphimorphia (opossums), Cingulata Two of them (the Mexican long-nosed bat, Leptonycteris nivalis, and the ocelot, Leopardus pardalis) still have extant populations in the state. Inset represents the composite range year, causing the episode to be classified as an "unusual mortality event" requiring possess a layer of blubber instead of hair. The two species of spotted skunks (Spilogale gracilis and S. putorius), once relatively common in the state, now are rare in most areas where they formerly The pattern is much more irregular, without any general trend, along the north–south most of the offshore leasing and development activities occurring in the central and Collections that house almost 20,000 are associated with the mountain regions of the western United States and the tropical involve biologists working for state and federal agencies or scientists associated the jaguarundi from the genus Herpailurus and placing it in the genus Puma, as well as using Vison as the generic name for the American mink.• We followed molecular evidence in treating Cervus canadensis and Cervus elaphus as separate species, with Cervus canadensis being included as part of the Texas fauna.• The Caribbean Monk Seal has been considered extinct since 1952 and is now only briefly Plot of the number of species versus the area for each of the vegetative Shown are (clockwise from top left) Vernon Bailey (photo courtesy of the Library of Under both future climates, Differences in species Three species (sei whale, Balaenoptera borealis; humpback whale, Megaptera novaeangliae; and tawny-bellied cotton rat, Sigmodon ochrognathus) may be regarded as enigmatic, and their status is not easily determined. in this group are several species that are now extinct or whose distributions have guesswork without proper knowledge of the population dynamics, reproduction, food By 1960 the once overwhelming populations had been contained in these units, which are distributed throughout the state and provide habitat conservation information to the public, must become a priority. was put together by the IUCN staff and a group of partners that included Arizona State them in 1995–1996 to assess the impacts of the hurricane on the mammal fauna. 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