Cambarus cymatilis Hobbs 1970

Cambarus (Depressicambarus) cymatilis Hobbs

Cambarus (Depressicambarus) cymatilis Hobbs, 1970:241, 250–259, figs. 3, 4; 1972b:112, 146, figs. 97a, 99a; 1974b:12, 89, fig. 37; 1976:545.—Bouchard, 1972:34, 35; 1978:30–31, figs. 1c, j, m, 3b.

Cambarus cymatilis.—Bouchard, 1972:56, 91, 106; 1978:29, 44–46.

These citations constitute a complete bibliography for the species and, excluding references to its occurrence in Tennessee by Bouchard (1972, 1978), are based on Georgia materials.

SUMMARY OF LITERATURE.—Except for its inclusion in keys, a few illustrations and discussions of certain anatomical features, the only new data presented for this species are those of Bouchard (1978), who pointed out several additional characters of the cheliped, added Bradley County, Tennessee, to its range, and discussed its affinities with other members of the subgenus, assigning it to his “latimanus group.”

DIAGNOSIS.—Eyes small. Rostrum without marginal spines, tubercles, or carina. Cervical spines or tubercles lacking. Areola very narrow or obliterated and constituting 41.7 to 44.8 percent of total length of carapace (48.2 to 50.9 percent of postorbital carapace length) and never with more than 1 punctation in narrowest part. Suborbital angle conspicuous and acute. Postorbital ridge terminating cephalically without spines or tubercles. Antennal scale 2.4 to more than 3 times as long as wide, broadest distal to midlength. Palm of chela with 5 to 7 tubercles in mesialmost row. First pleopod of first form male with short central projection recurved at 110 to 120 degrees to shaft of appendage, and provided with prominent subapical notch; mesial process inflated, subconical, and extending caudally much beyond tip of central projection; caudal knob absent. Mesial ramus of uropod with distomedian spine far overreaching margin of ramus (similar to Figure 86b). Color blue; abdominal terga without stripes or bands. Female with first pleopod present.

COLOR NOTES (Figure 37e).—

Dorsal surface of carapace and abdomen dark cobalt blue, fading rapidly on lateral surfaces of hepatic area, branchiostegites, and pleura through pale blue to cream with a faint bluish suffusion. Cephalic section of telson mottled with blue laterally and dark blue triangular area medially, caudal section pale bluish gray. Uropod also pale bluish gray with median longitudinal dark blue line in each ramus, lateral ramus with additional dark blue line along proximal margin of transverse suture. Dorsal surface of peduncle of antenna and lateral margin of antennal scale dark blue. Cheliped dark blue dorsally from distal third of merus almost to ends of fingers, [costa on propodus cream] and ventral surface pale gray to bluish cream [virtually all tubercles cream to white]; tips of fingers corneous (yellow [to pinkish] orange). Dorsal portions of remaining pereiopods from merus to propodus mottled with dark blue, otherwise cream to pale grayish blue. Sternal area mostly cream to white with isolated blue patches (Hobbs, 1970:257).

TYPES.—Holotype, allotype, and morphotype, USNM 129860, 129861, 129862 (I, , II); paratypes, USNM.

TYPE-LOCALITY.—Near the western city limits of Chatsworth, Murray County, Georgia, in lawn and rose garden of Mr. Charles S. Dunn off Chestnut Street.

RANGE.—Previously known only from the immediate vicinity of Chatsworth, Murray County, Georgia. Dr. Bouchard has kindly informed me that D. A. Etnier had found 2I, and 1 ovigerous in a seepage area along Mill Creek upstream from State Route 74, Bradley County, Tennessee, on 21 April 1977.

GEORGIA SPECIMENS EXAMINED.—I have examined a total of 15 specimens that have been collected in three localities. Murray County: (1) type-locality, 2I, 2, 1j, 1 ovig , 24 Apr 1968, C. S. Dunn, E. T., Hall, Jr., HHH, collectors; 2I, 2, 4 Apr 1973, CSD; (2) 214 Fourth Avenue, Chatsworth, 2II, 25 Apr 1968, ETH, HHH; (3) field adjacent to Holly Creek approximately 1 mi NE of Chatsworth, 1I, 2, 25 Apr 1968, ETH, HHH.

VARIATIONS.—As was pointed out in the original description, there are few variations the limits of which were not included in the descriptions of the three primary types. The rostral margins may be angular at the base of the short acumen, or they may be so gently curved as to obscure any demarcation of the base of the latter. The areola, always narrow, is reduced to a line in some individuals, and its length seems to increase proportionately with increase in carapace length (Hobbs, 1970:258, fig. 4). The mesial half of the dorsal surface of the palm of the chela may or may not bear tubercles lateral to those comprising the two mesial rows; the mesialmost consisting of five to seven tubercles (in one specimen, an eighth tubercle is eccentrically situated), and the adjacent one of three to seven. On the ventral surface of the chela, there are typically one tubercle on the thickened ridge opposite the base of the dactyl and another slightly proximomesial to it; frequently there are two such tubercles in each position. The mesial surface of the carpus of the cheliped always bears one large subacute tubercle, and two or three additional smaller ones may or may not be situated proximal to it. The ventrolateral and ventromesial rows of tubercles on the merus of the cheliped range from three to five and seven to ten, respectively; that on the ischium ranges from two to four.

SIZE.—The largest specimen available is the allotypic female, which has a carapace length of 39.7 (postorbital carapace length 35.0) mm. The largest and smallest first form males have corresponding lengths of 34.5 (30.9) and 30.7 (26.9) mm, respectively. The only female I have examined that carried eggs or young is the ovigerous allotype.

Cambarus (Depressicambarus) cymatilis Hobbs

Cambarus (Depressicambarus) cymatilis Hobbs, 1970b:251, figs. 3, 4; 1974b: 12, fig. 37; 1981:100, figs. 23h, 37e, 39a, 43, 44, 198.—Bouchard, 1978a:30, figs. 1c, j, m, 2b.

Cambarus cymatilis.—Hobbs, 1970b:241.

TYPES.—Holotype, allotype, and morphotype, USNM 129860, 129861, 129862 (male I, female, male II); paratypes, USNM.

TYPE LOCALITY.—Western city limits of Chatsworth, Murray County, Georgia, in lawn and rose garden of Mr. Charles S. Dunn, off Chestnut Street

RANGE.—Vicinity of Chatsworth, Murray County, Georgia, and along Mill Creek, upstream from State Route 74, Bradley County, Tennessee.

HABITAT.—Burrows (primary burrower).

Cambarus (Depressicambarus) deweesae Bouchard and Etnier

Cambarus (Depressicambarus) deweesae Bouchard and Etnier, 1979:589, fig. 1.

Cambarus deweesae.—Bouchard and Etnier, 1979:596.

TYPES.—Holotype and allotype, USNM 148363, 148364 (male I, female), and morphotype, CM 74.1092; paratypes, USNM.

TYPE LOCALITY.—Seepage area near east bank of Poplar Creek at State Highway 61 (south side of highway), Anderson County, Tennessee.

RANGE.—Known from only four localities in the Clinch (Anderson County) and Emory (Roane County) river basins in Tennessee.

HABITAT.—Burrows (primary burrower).

Cambarus (Depressicambarus) englishi Hobbs and Hall

Cambarus (Depressicambarus) englishi Hobbs and Hall, 1972:151, fig. 1a–n.—Hobbs, 1974b:12, fig. 30; 1981:92, figs. 23j, 37a, 39b, 40, 41, 199.—Bouchard, 1978a:31, figs. 1b, h, 3c.

Cambarus englishi.—Wharton, 1978:46.

TYPES.—Holotype, allotype, and morphotype, USNM 131700, 131701, 132519 (male I, female, male II); paratypes, USNM, BMNH.

TYPE LOCALITY.—Tallapoosa River, in riffle area 1 mile (1.6 km) north of Tallapoosa, Haralson County, Georgia, a few hundred yards east of bridge on State Route 100.

RANGE.—Endemic in the Tallapoosa Basin, where known from two subjacent localities in Georgia and from Clay, Cleburne, and Tallapoosa counties, Alabama.

HABITAT.—Streams.

Cambarus (Depressicambarus) cymatilis Hobbs

Cambarus (Depressicambarus) cymatilis Hobbs, 1970b:251, figs. 3, 4.

TYPES.—Holotype, allotype, and morphotype, USNM 129860, 129861, 129862 (1, , ll); para types, USNM.

TYPE-LOCALITY.—Western city limits of Chatsworth, Murray County, Georgia, in lawn and rose garden of Mr. Charles S. Dunn, off Chestnut Street.

RANGE.—Known from only three localities in the immediate vicinity of Chatsworth, Murray County, Georgia.

HABITAT.—Burrows (primary burrower).

Cambarus (Depressicambarus) englishi Hobbs and Hall

Cambarus (Depressicambarus) englishi Hobbs and Hall, 1972: 151, fig. 1a–n.

TYPES.—Holotype, allotype, and morphotype, USNM 131700, 131701, 132519 ( I, , II); paratypes, USNM.

TYPE-LOCALITY.—Tallapoosa River, in riffle area 1 mile north of Tallapoosa, Haralson County, Georgia, a few hundred yards east of bridge on State Route 100.

RANGE.—Known only from the Tallapoosa River in Haralson County, Georgia, and Clay County, Alabama.

HABITAT.—Stream.

Cambarus cymatilis, the Conasauga blue burrower is a species of burrowing crayfish in the family Cambaridae. It is native to Tennessee and Georgia in the United States. The common name refers to the Conasauga River.

The IUCN conservation status of Cambarus cymatilis is "EN", endangered. The species faces a high risk of extinction in the near future. The IUCN status was reviewed in 2010.