Key to common families of leeches in Spencer Creek

1a) Body flattened, posterior half usually much wider than tapering anterior end. Mouth a small
pore on rim or within anterior sucker cavity from which a proboscis can protrude. Generally 1
pair of eyes; sometimes with additional 1, 2, or 3 pairs behind first pair. Whitish warts may be
present on dorsal surface. Young leeches may be attached to ventral surface.
GLOSSIPHONIIDAE




1b) Body ribbon-like, only anterior quarter tapering. Mouth opening occupying entire anterior
sucker cavity, no protruding proboscis. Eyes 0, 3, 4, or 5 pairs. 2




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