ZOOGEOGRAPHY 



269 



SUBORDER VALVIFERA 



Antarcturus Jloridanus (Richardson, 



1900b) 

 Arcturella bispinata Menzies and 



Kruczynski, 1983 

 Arcturella spinata Menzies and 



Kruczynski, 1983 

 Astacilla lauffi Menzies and 



Frankenberg, 1966 

 Chiridotea excavata Harper, 



1974 

 * Cleantioides planicauda (Benedict, 



1899) 



Edotea lyonsi (Menzies and 



Kruczynski, 1983) 

 Edotea montosa (Stimpson, 1853) 

 Edwinjoycea horologium Menzies and 



Kruczynski, 1983 

 *Ericksonella attenuata (Harger, 



1873) 

 * Erichsonella Jiliformis (Say, 1818) 

 * Erichsonella Jloridana Benedict, 



1901 

 Erichsonella isabelensis Menzies, 



1951b 

 *Idotea metallica Bosc, 1802 



* species also occurring in the Caribbean 



Note: Records for the Gulf of Mexico have been assembled from published 

 literature; in most cases, actual material has not been examined. 



BERMUDA 



Twenty-nine species of isopods have been recorded from Bermuda (Table 7). 

 Of these, nine are endemics (three being cave forms). The remaining 20 

 species have all been recorded from the Caribbean region, indicating a strong 

 subtropical connection, in spite of the relatively high latitude (32°15'N). Al- 

 though Bermuda is of Eocene or Oligocene age, the tropical fauna was prob- 

 ably decimated by the low temperatures of the last Pleistocene glaciation 

 (Briggs, 1974:76). 



CAVE ISOPODS 



With the expanding efforts of cave divers, more and more true stygobiont 

 forms are being found. Concurrently, discussion of the origin of cave fauna 

 has spurred several theories, all invoking the geological history of the Carib- 

 bean area. 



Among the isopods, cave forms have been found in four suborders, the 

 Asellota, Anthuridea, Flabellifera, and Microcerberidea. Two valuable dis- 

 cussions on the origin of cave crustaceans may be found in Stock (1986) and 

 Wagele (1985). 



The only true cave asellote, Atlantasellus cavemicolus Sket, was collected 

 from Bermuda. 



