Branchiopod and Malacostracan Crustaceans 
17 
Table 2. Percentages by months of isopod taxa collected at Santee National 
Wildlife Refuge, S.C. Stations included are only those where isopods 
were found at least once. Data on species of Caecidotea are based 
solely on the occurrence of males, unless only one species of Caecidotea 
was collected at a particular locality. Data from 1982 and 1983 have 
been combined. 
Caecidotea 
Caecidotea 
Caecidotea 
Caecidotea 
Lirceus 
Stations 
forbesi 
laticaudata 
obtusa 
spp. 
lineatus Sampled 
Dec-Jan 
30.8 • 
11.5 
3.8 
46.2 
30.8 
26 
Mar- May 
36.4 
0.0 
0.0 
54.5 
27.3 
11 
Jun-Jul 
31.0 
28.6 
0.0 
64.3 
2.4 
42 
Aug-Sep 
10.0 
22.5 
0.0 
50.0 
0.0 
40 
Nov 
9.5 
0.0 
0.0 
14.3 
14.3 
21 
Table 3. Percentages by months of all aquatic isopod specimens from Santee 
National Wildlife Refuge, S.C., represented by Caecidotea spp. and 
Lirceus lineatus. Data from 1982 and 1983 have been combined. 
Caecidotea spp. 
Dec-Jan 57.6 
Mar-May 79.8 
Jun-Jul 99.5 
Aug-Sep 100.0 
Nov 45.4 
L. lineatus 
Total 
42.4 
295 
20.2 
89 
0.5 
384 
0.0 
74 
54.5 
33 
of habitats, but impoundments were more commonly occupied than 
were shallow forest swamps or ditches. Brooding females were collected 
only from December through March. 
Oniscoid isopods were found only on and near the Indian Mound 
Historic Site at Fort Watson on the edge of Bluff unit. This site is 
outside the protected refuge area and is subject to significant human 
disturbance. Repeated searches for terrestrial isopods elsewhere in the 
refuge met with no success. 
Collection of C. laticaudata , C. obtusa, Porcellionides floria , and 
Miktoniscus halophilus at the refuge constitutes their first documented 
occurrences in South Carolina. Caecidotea laticaudata has been reported 
previously from Louisiana, Alabama, Mississippi, Kentucky, and Illinois 
(Williams 1970, 1972; Fleming 1972). Caecidotea obtusa is also primarily 
