KEY TO THE SPECIES OF THE SUBGENUS JUGICAMBARUS

• Central projection of first pleopod lacking subapical notch (Figs. 106d, 109):...........................................  7

Fig. 106.  a-e, Lateral view of left first pleopods; f, Dorsal view of chelae.  a, Cambarus distans;  b, C. parvoculus;  c, C. conasaugaensis;  d, C. zophonastes;  e, C. monongalensis,  f, C. carolinus. (n, subapical notch).

2(1).   Albinistic;  eyes reduced and wthout pigment...............................................................................................  3

• Pigmented;  eyes well developed and with pigment.....................................................................................  4

3(2).   Rostrum with marginal spines or tubercles (Fig. 107a;  see also Figs. 10c, 87b):..................................
           .......................................................................................................................  Cambarus (J.) setosus  Faxon, 1889.

       (Subterranean waters of southwestern Missouri and perhaps in northeastern Oklahoma.
        Literature:  Hobbs and Barr, 1960;  Hobbs, 1969b).

• Rostrum lacking marginal spines or tubercles (Fig. 107b;  see also Fig. 10e):........................................
  .................................................................................................................  Cambarus (J.) cryptodytes  Hobbs, 1941.

        (Subterranean waters from Jackson County, Florida, to Deatur County, Georgia.
          Literature:  Hobbs and Barr, 1960).

4(2).   Areola at least 8 times longer than broad (Fig. 107c;  see also 106e);  color blue:.................................
           .......................................................................................................  Cambarus (J.) monongalensis  Ortmann, 1905.

       (Burrows in the mountains of western Pennsylvania and adjacent northern West Virginia.
        Literature:  Ortmann, 1906,  1931;  Hobbs, 1969b).

• Areola less than 8 times longer than broad (Figs. 107d, 108a, b);  color reddish to greenish brown.......  5

5(4).   Central projection of first pleopod directed approximately at right angle to shaft of appendage
           (Fig. 106a;  see also Fig. 107d):...................................................... Cambarus (J.) distans  Rhoades, 1944.

       (Lotic habitats on the Cumberland Plateau in the Cumberland River drainage system in
        Kentucky and Tennessee.  Literature:  Rhoades, 1944a).

• Central projection of first pleopod strongly recurved caudoproximally (Fig. 106b, c):................................  6

Fig. 107.  Dorsal view of carapaces.  a, Cambarus setosus;  b, C. cryptodytes;  c, C. monongalensis;  d, C. distans.

6(5).   Areola at least 5.5 times longer than broad (Fig. 108a;  see also Fig. 106b):.......................................
           ..............................................................................................  Cambarus (J.) parvoculus  Hobbs and Shoup, 1947.

       (Lotic habitats in the upper Cumberland River dainage in Kentucky and Tennessee, and the
        Tennessee River drainage in Lee County, Virginia.  Literature:  Hobbs and Shoup, 1947;  Hobbs, 1969b).

• Areola less than 5.5 times longer than broad (Fig. 108b;  see also Fig. 106c):......................................
  .....................................................................................  Cambarus (J.) conasaugaensis  Hobbs and Hobbs, 1962.

       (Lotic habitats in the Conasauga and Coosawattee river systems in Tennessee and Georgia.
        Literature:  Hobbs and Hobbs, 1962;  Hobbs, 1969b).

7(1).   Albinistic;  eyes reduced and without pigment (See Fig. 106d):...............................................................
           .......................................................................................  Cambarus (J.) zophonastes  Hobbs and Bedinger, 1964.

       (Subterranean water in Hell Creek Cave, Stone County, Arkansas.
         Literature:  Hobbs and Bedinger, 1964;  Hobbs, 1969b).

• Pigmented;  eyes well developed and with pigment....................................................................................  8

8(7).   Areola narrow, with no more than 1 punctation in narrowest part (Fig. 108c);  chelae not
           conspicuously setose (Fig. 106f):.................................................................................................................  9

• Areola broad to moderately broad, with room for 3 or more punctations across narrowest part
  (Fig. 108d, e);  chelae conspicuously setose (Fig. 8e):.............................................................................. 11

Fig. 108.  Dorsal view of carapaces.  a, Cambarus parvoculus;  b, C. conasaugaensis;  c, C. carolinus;  d, C. friaufi;  e, C. brachydactylus.

9(8).   Central projection of first pleopod extending caudad much farther than mesial process
           (Fig. 109a):............................................................................................  Cambarus (J.) causeyi  Reimer, 1966.

       (Burrows near a spring and natural pond, 4 miles west of Sandgap,  Pope County, Arkansas,
        on St. Rte. 124.  Literature:  Reimer, 1966;  Hobbs, 1969b).

• Central projection of first pleopod extending little, if any, farther caudad than mesial process
  (Fig. 109b-f):...................................................................................................................................................  10

10(9).   First pleopod with adjacent margins of terminal elements subparallel (Fig. 109b);  color blue and
              yellow:...................................................................................................  Cambarus (J.) gentryi  Hobbs, 1970.

       (Burrows along the Cumberland (Stones River, Harpeth River, and Yellow Creek) and Duck
        drainage systems in middle Tennessee.  Literature:  Hobbs, 1970a).

• First pleopod with adjacent margins of terminal elements diverging (Fig. 109c;  see also
  Figs.  106f, 108c);  color red to orange or blue with red to orange markings:...........................................
  ................................................................................................................  Cambarus (J.) carolinus  (Erichson, 1846).

       (Burrows in the mountains and foothills from Kentucky and Pennsylvania to Georgia and
        South Carolina.  (Almost certainly, there are several species or subspecies currently
        assigned to C. carolinus,  including C. dubius Faxon, 1884.   Literature:  Faxon, 1885;  Hobbs, 1969b).

Fig. 109.  Lateral view of left first pleopods.  a, Cambarus causeyi;  b, C. gentryi;  c, C. carolinus;  d, C. asperimanus;  e, C. friaufi;  f, C. branchydactylus.  (ck, caudal knob).

11(8).   Central projection of first pleopod strongly recurved proximocaudally, tip extending  proximal to
             distal base of mesial process and not projecting so far caudad as latter (Fig. 109d;  see also
              Fig. 89e, i):..................................................................................  Cambarus (J.) asperimanus  Faxon, 1914.

       (Lotic habitats in the headwater streams from the French Broad, Little Tennessee, Savannah,
        Saluda, Catawba, and Broad rivers in Georgia, North Carolina, South Carolina, and Tennessee.
        Literature:  Faxon, 1914;  Hobbs, 1969b).

• Central projection of first pleopod recurved at not much more than right angle to principal shaft of
  appendage, not extending proximal to distal base of mesial process and projecting caudad as far
  as latter (Fig. 109e, f):..........................................................................................................................................  12

12(11).   Areola with comparatively few punctations;  caudolateral surface of first pleopod with prominent
               lobe-like caudal knob at caudolateral base of central projection (Fig. 109c;  see also
               Fig. 108d):................................................................................................  Cambarus (J.) friaufi  Hobbs, 1953.

       (Lotic habitats on the Eastern Highland Rim (Cumberland River drainage), Tennessee.
        Literature:  Hobbs, 1953a, 1969b).

• Areola with many punctations;  caudolateral surface of first pleopod lacking prominent lobe-like
  caudal knob at caudolateral base of central projection (Fig. 109f;  see also Figs. 8e,  108e):...................
  .......................................................................................................  Cambarus (J.) branchydactylus  Hobbs, 1953.

      (Lotic habitats in tributaries of the Cumberland River on the western Highland Rim in Tennessee.
       Literature:  Hobbs, 1953a, 1969b).

END OF SUBGENUS JUGICAMBARUS

Last Updated:  10 September 2004