PUNCTICAMBARUS

Up
AVITICAMBARUS
CAMBARUS
DEPRESSICAMBARUS
EREBICAMBARUS
HIATICAMBARUS
JUGICAMBARUS
LACUNICAMBARUS
PUNCTICAMBARUS
VETICAMBARUS
 

 

 

KEY TO THE SPECIES OF THE SUBGENUS PUNCTICAMBARUS


1.   Rostrum with marginal spines or tubercles (Fig. 111a-c):.................................................................................  2
  • Rostrum without marginal spines or tubercles (Fig. 111d):...........................................................................  4

2(1).   Hepatic region of carapace with 1 or more spines (Fig. 111a):...........  Cambarus (P.) spicatus  Hobbs, 1956.

       (Lotic habitats in the Little River drainage system in Fairfield and Richland counties,
        South Carolina.  Literature:  Hobbs, 1956c,  1969b).

  • Hepatic region of carapace usually with tubercles but always lacking spines (Fig. 111b, c):.................  3

3(2).   Areola comprising more than 36 per cent of total length of carapace (Fig. 111b;  see also Fig. 90c):......
          ...............................................................................................................  Cambarus (P.) nerterius  Hobbs, 1964.

       (Subterranean waters in the Greenbrier River drainage in West Virginia.
         Literature:  Hobbs, 1964, 1969b).

  • Areola comprising less than 36 per cent of total length of carapace (Fig. 111c;  see also Fig. 90b):........
    ...........................................................................................................  Cambarus (P.) extraneus  Hagen, 1870.

       (Lotic habitats in the Tennessee River drainage system in Georgia.
         Literature:  Hagen, 1870;  Hobbs, 1969b).

Fig. 111. Dorsal view of carapaces.  a, Cambarus spicatus;  b, C. nerterius;  c, C. extraneus;  d, C. reburrus.

4(1).   Areola less than 3.5 times longer than broad (Fig. 111d);  fingers of chelae distinctly pubescent
           dorsally (Fig. 112a):..................................................................................  Cambarus (P.) reburrus  Prins, 1968.

       (Lotic habitats in the headwaters of the French Broad and Savannah rivers in North Carolina.
         Literature:  Prins, 1968;  Prins and Hobbs, 1972).

  •  Areola more than 3.5 times longer than broad;  fingers not conspicuously pubescent dorsally
    (Fig. 112b, c):......................................................................................................................................................  5
Fig. 112.  Dorsal view of chelae.  a, Cambarus reburrus;  b, C. acuminatus;  c, C. veteranus.

5(4).   Width of palm of chela less than 1.5 times length of its mesial margin (Fig. 112c):...................................
           ....................................................................................................................  Cambarus (P.) veteranus  Faxon, 1914.

       (Lotic habitats in the Guyandot drainage system in southern West Virginia;  also in eastern
        Kentucky.  The limits of the range are not known.  Literature:  Faxon, 1914;  Hobbs, 1969b).

  • Width of palm of chela more than 1.5 times length of its mesial margin (Fig. 112b):.................................  6
Fig. 113.  Lateral view of cephalic region.  a, Cambarus robustus;  b, C. acuminatus (sa, suborbital angle).

6(5).   Suborbital angle (sa) present (Fig. 113a;  see also Fig. 89m):..........  Cambarus (P.) robustus  Girard 1852.

       (Lotic habitats from Ontario and New York to Illinois and southward to Tennessee, North Carolina
        and Virginia.  Populations in the Atlantic watershed from Maryland to South Carolina that are
        currently assigned to C. acuminatus probably represent one or more undescribed species or
         subspecies.  Literature:  Crocker and Barr, 1968;  Hobbs, 1969b).

  • Suborbital angle absent (Fig. 113b; see also Fig. 112b):............  Cambarus (P.) acuminatus  Faxon, 1884

       (Lotic habitats in the Atlantic watershed from Maryland to the Saluda River drainage, South Carolina.
        This is a species complex and needs revision.  See the statement under C. robustus in this couplet.
        Literature:  Faxon, 1885;  Hobbs, 1969b).


END OF SUBGENUS PUNCTICAMBARUS

Last Updated:  10 September 2004