Procambarus truculentus Hobbs 1954

Procambarus (Hagenides) truculentus Hobbs

Procambarus truculentus Hobbs, 1954:111–118, figs. 1–13; 1959: 887; 1968b:K-11, fig. 16h.—Hart and Hart, 1974:21, 90.

Procambarus (Hagenides) truculentus.—Hobbs, 1972a:7; 1972b: 49, 152, 154, figs. 5i, 41c; 1974b:49, fig. 201—Hobbs III, Thorp, and Anderson, 1976:3, 12, 29–31, fig. 12.

These citations are believed to constitute a complete bibliography of the species, and all of the articles refer to its occurrence in Georgia.

SUMMARY OF LITERATURE.—This crayfish was first collected in 1934, but not until 20 years later was it described and reported from five localities in Bulloch, Emanuel, and Jenkins counties, Georgia. No additional information was added to our knowledge of the species until Hart and Hart (1974) reported its occurrence in Treutlen County, where it served as a host to two entocytherid ostracods: Ankylocythere ancyla and Entocythere internotalus. The account of the species presented by Hobbs III, Thorp, and Anderson (1976) contains no new data and was largely extracted from the information presented with the original description.

DIAGNOSIS.—Rostrum without marginal spines or tubercles. Carapace lacking cervical spines. Areola 8.8 to 16 (average 13.0) times as long as broad and constituting 36.0 to 38.7 (average 37.3) percent of entire length of carapace (41.1 to 44.2, average 42.6, percent of postorbital carapace length). Ventral surface of basis and ischium of third maxilliped not densely bearded. Male with mesial surface of palm of chela lacking beard but bearing cristiform row of tubercles; hook on ischium of third pereiopod only; coxa of fourth pereiopod with caudomesial boss. First pleopods of first form male asymmetrical, contiguous, and reaching coxae of second pereiopods, cephalic surface without shoulder or preapical setae; mesial process acute, directed caudally and usually entirely obscured in lateral aspect by central projection; cephalic process absent; central projection, also caudally directed, corneous, beaklike, and arising from caudal surface of expanded distal part of appendage; caudal knob, flanking proximocaudal base of central projection, variable in shape but always somewhat inflated. Female with chela as in male; annulus ventralis subcircular to elliptical in outline, very deeply embedded in sternum, and cephalolateral elevations lacking well-developed tubercles; first pleopod present.

COLOR NOTES (Figure 118f).—Ground color of carapace grayish tan to dark brown; cephalic section lighter than thoracic region, latter suffused with dark green and fading ventrally through bluish or mauve gray to pale gray or buff along ventral margin. Cervical groove, margins of rostrum, and postorbital ridges bluish green. Abdomen grayish buff to brown, with nondescript markings in cream and dark gray or brown; pleura pale mauve to tan, with or without light greenish gray line along base; telson and uropods with lateral parts and tips like pleura, otherwise colorless, with grayish green to brown splotches. Ground color of chelae and pereiopods buff to pale pinkish tan and bearing greenish blue to dark brown markings (particularly dorsally flanking articulations); tubercles on chela bluish green to purplish black, same color on dorsal surface of dactyl and on dorsomesial half of fixed finger; tubercles on mesial surface of palm dark basally but with cream to pinkish cream tips; lateral and ventral areas of chela light orange buff with pink suffusion; tubercles on opposable margins of fingers cream. Remaining pereiopods pinkish cream or greenish gray, with color intensified on dorsal surfaces of merus and carpus. Ventral part of body pinkish to bluish cream, with pale tan to gray setae.

TYPES.—Holotype, allotype, and morphotype, USNM 95670, 95671, 97672 (I, , II); paratypes, MCZ, TU, USNM.

TYPE-LOCALITY.—Seepage area 11 miles north of Lyons on U.S. Highway 1, Emanuel County, Georgia.

RANGE.—The Vidalia Upland District of Georgia, between the Oconee and Ogeechee rivers. There is one first form male in the Smithsonian collection with a questionable label “South Carolina,” but other locality data are lacking.

GEORGIA SPECIMENS EXAMINED.—I have examined a total of 48 specimens from the following localities. Bulloch County: (1) 14.2 mi S of Millen on US Hwy 25, 1II(molted to form I in laboratory in October), 2II, 3, 17 Apr 1944, HHH, collector. Candler County: (2) adjacent to Wolfe Creek, about 6 mi S of Metter on St Rte 129, 1, 30 May 1969, E. T. Hall, Jr., HHH. Emanuel County : (3) type-locality, 1II, 6, 23 Aug 1937, HHH; 3, 9 Jun 1940, HHH; 6, 7 juv, 18 May 1941, G. B. Hobbs, HHH; 3, 25 May 1941, GBH, HHH: 1II(molted to form I in laboratory in November), Aug 1941, HHH; (4) 6.8 mi S of Swainsboro on US Hwy 1, 2j, 2j, 15 Jun 1934, J. S. Rogers, R. E. Bellamy, HHH; (5) 5.5 mi NE of Swainsboro on St Rte 56, 1II, 1, 4 May 1945, HHH; (6) 11 mi N of St Rte 292 on US Hwy 1, 1I, 20 Apr 1977, C. E. Carter, J. E. Pugh, HHH. Jenkins County : (7) 9.2 mi S of Millen on US Hwy 25, 1II, 1, 27 Mar 1939, H. H. Wallace, HHH. Laurens County : (8) 14.5 mi SE of East Dublin on St Rte 29, 1j, 22 Apr 1966, ETH, HHH. Treutlen County : (9) 19.5 mi SE of Dublin on St Rte 29 (Hart and Hart, 1974:21, 90), 1I, 1, 1 ovig , 22 Apr 1966, ETH, HHH. Washington County: (10) 7.3 mi N of Johnson Co line on St Rte 15, 1II, 26 Apr 1966, ETH, HHH.

VARIATIONS.—Most of the variations noted are in the number of spines and tubercles on the chelipeds—7 to 10 occur in the cristiform row along the mesial margin of the palm. The basal segment of the antennule may or may not bear a spine on the ventral surface. The variations observed in the first pleopod of the first form male are illustrated in Figure 129. The cephalolateral ridges of the annulus ventralis may or may not bear weak tubercles, and in some specimens they end abruptly in a single tuberculiform prominence; the area covered by the median excavation of the annulus is quite variable. Too few specimens are available, except from the type-locality, where there is considerable diversity, to detemine the extent of individual differences within members of the several known local populations.

SIZE.—The largest specimen available is a female having a carapace length of 34.6 (postorbital carapace length, 31.1) mm. The corresponding lengths of the smallest and largest first form males are 28.4 (25.2) mm and 32.0 (28.3) mm, respecttively, and of the only known ovigerous female, 26.6 (23.2) mm.

Procambarus (Hagenides) truculentus Hobbs

Procambarus truculentus Hobbs, 1954a:111, figs. 1–13.

Procambarus Truculentus.—Hobbs, 1954a:111.

Procambarus (Hagenides) truculentus.—Hobbs, 1972a:7; 1974b:49, fig. 201; 1981:337, figs. 17b, 118f, 120, 128, 129, 239.

TYPES.—Holotype, allotype, and morphotype, USNM 95670, 95671, 95672 (male I, female, male II); paratypes, MCZ, TU, USNM.

TYPE LOCALITY.—Seepage area 11 miles (17.6 km) north of Lyons on U.S. Highway 1, Emanuel County, Georgia.

RANGE.—Upper Coastal Plain between the Oconee and Ogeechee rivers in Georgia.

HABITAT.—Burrows in flatwoods and seepage areas (primary burrower).

Astacus.—LeConte, 1856:401 [in part].

Cambarus.—Hagen, 1870:16 [in part].

Procambarus (Hagenides) truculentus Hobbs

Procambarus truculentus Hobbs, 1954:111, figs. 1–13.

Procambarus Truculentus.—Hobbs, 1954:111.

Procambarus (Hagenides) truculentus.—Hobbs, 1972a:7.

TYPES.—Holotype, allotype, and morphotype, USNM 95670, 95671, 95672 ( I, , II); paratypes, MCZ, TU, USNM.

TYPE-LOCALITY.—SSeepage area 11 miles north of Lyons, Emanuel County, Georgia.

RANGE.—Between the Altamaha and Savannah rivers in Georgia.

HABITAT.—Burrows in flatwoods and seepage areas (primary burrower).

Leconticambarus Hobbs, 1972a:7. [Type-species by original designation, Cambarus barbatus Faxon, 1890:621. Gender: masculine.]

Procambarus (H.) truculentus

E Ankylocythere ancyla: Treutlen (Hart and Hart, 1974:21)

Entocythere internotalus: Treutlen (Hart and Hart, 1974:90)