The Texas rat snake (''Pantherophis obsoletus lindheimeri)'' is a
subspecies
In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...
of the
black rat snake Black rat snake may refer to:
*'' Pantherophis alleghaniensis'', the eastern ratsnake
* '' Pantherophis spiloides'', the central ratsnake
*'' Pantherophis obsoletus'', the western ratsnake
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