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| Procambarus A.Acutus |
Procambarus Acutus Acutus / Procambarus A.Acutus
Common name : White River Crawfish
Size: can reach 5 inchi
Native Range: Southern Atlantic coast drainage from Georgia to Maine and from the Florida panhandle to Mexico; central Mississippi Valley to the upper Great Lakes drainages.
Recognition Characters Procambarus A.Acutus : A large dark red or brown crayfish with a blackish, wedge-shaped pattern on the abdomen and long, slender pincers. Carapace laterally compressed, its sides with a granular texture resulting from many small bunps or tubercles. Areola present, grooves separated at midpoint by a narrow space. Rostrum with a trough-like central depression, its margins strongly converging anteriorly. Acumen short, the spines or tubercles separating it from remainder of rostrum small or absent.
Male gonopod with four short processes, three of which are strongly curved laterally from midline. Processes partly obscured by hairlike structures. Gonopod tips without a prominent shoulder. Hooks present on bases of second and third pairs of walking legs. Female sperm receptacle with fossa located to right of midline and overhung by the largest of three tubercles present on surface of receptacle (Pflieger, 1996).
Coloration: Adults typically are burgundy red with a black wedge-shaped pattern on the abdomen. Tubercles on sides of the body and pincers are cream-colored. Occasionally adults are brownish rather than red. Specimens taken from turbid water are often pale colored, almost tan in coloration. Juveniles are pale gray with blackish spots laterally on the carapace and do not have a blackish wedge on the abdomen.
Size : Adults are about 3 to 5 inches (76-127 mm) in total length.
Habitat Procambarus A.Acutus : Reimer (1963) reported that this crayfish had the greatest diversity of habitat of any Arkansas crayfish. On the ONF in both Arkansas and Oklahoma, this species preferred lentic backwater habitats, but occasionally could be found in burrows at the margins of pools.
General Range: The general range of the nominate form, Procambarus acutus acutus, is from the Coastal Plain and piedmont from Maine to Georgia, from the Florida panhandle to Texas, and from Minnesota to Ohio. This form intergrades with P. a. cuevachicae in southwestern Texas and northern Mexico.
Procambarus A.Acutus has been believed to occur continuously northward along the Atlantic coastal plain into southern New England. The absence of published records, and the inability to locate specimens during recent surveys from a large portion of southwestern New England indicates a discontinuity in the northern part of the subspecies' range. Other animals and plants show a similar range discontinuity in southern New England and several theories are available to explain the phenomenon.
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| Procambarus A.Acutus full body |
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| Procambarus A.Acutus Head |
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| Procambarus A.Acutus |
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| Procambarus Acutus Acutus Red |
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