Abstract
Abstract Oryzomys texensis Allen, 1894, the Texas Marsh Rice Rat, is a yellowish gray-brown oryzomyine rodent with whitish feet and venter, black eyes, small hairy ears, short vibrissae, and a tail about one-half of total length. It was elevated to species status based on the results of an extensive molecular genetics analysis of the O. palustris complex. The poorly defined eastern boundary of O. texensis includes Mississippi, Arkansas, southern Missouri, and southern Illinois, with populations extending westward to southeastern Kansas, eastern Oklahoma, eastern and coastal Texas, into northeastern Tamaulipas, Mexico. Present in tidal marshes and other habitats near water, O. texensis is omnivorous, with some populations being highly carnivorous.
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