Invertebrate Cave Fauna 
99 
Fig. 33. Food web for Banners Corner Cave, Russell County, Va. The dotted 
lines indicate feeding by flatworms on injured and moribund amphipods and 
isopods. 
Gammorus pulex 
'l' Fertilized egg 
O Release from marsupium 
Eggs in marsupium 
if Sexual maturity 
if Death 
Niphargus orcinus virei 
★ 
■if 
YEARS ° 
3 4 5 6 
Fig. 34. Life history comparison of the troglobitic amphipod Niphargus orcinus 
virei with the epigean amphipod Gammarus pulex. Modified Irom Ginet ( 1960). 
