University of Wisconsin Digital Collections
Link to University of Wisconsin Digital Collections
Link to University of Wisconsin Digital Collections
Ecology and Natural Resources Collection

Page View

Becker, George C. / Fishes of Wisconsin
(1983)

Killifish family - cyprinodontidae,   pp. 753-765 ff. PDF (5.2 MB)


Page 753

 
Killifish Family 
            Cyprinodontidae 
  Three species of killifish in one genus occur in Wisconsin. Only one 
species has a wide north-south distribution in the state; the other two 
appear in southern Wisconsin as the northernmost populations of south- 
ern forms. 
  The family Cyprinodontidae is represented by 48 species in 10 genera 
in the United States and Canada, a number of which are both marine 
and freshwater in habit (Robins et al. 1980). The family includes the Devils
Hole pupfish, Owens River pupfish, Comanche Springs pupfish, and 
Pahrump killifish of the southwest, all of which are endangered and have
been the subjects of congressional conservation measures. 
  The killifish are small fishes which inhabit shallows and are adapted 
to surface feeding. Their jaws have well-developed teeth, their heads 
are flattened above, and they have small, more or less dorsal mouths. 
The gill membranes are free from the isthmus, and the scales are cy- 
cloid. Killifish possess soft-rayed fins; a single dorsal fin is located
pos- 
teriorly. In adult killifish, the duct between the swim bladder and the 
pharynx is lost (physoclist). 
753 


Go up to Top of Page