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HIRUDINEA Dissected? -based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); Blue text = by Michelle Dobrin, U of Windsor, 2017 only visible if HIRUDINEA dissected? • Mouth a small pore in the oral sucker through • Mouth medium to large which a muscular proboscis can be protruded • no proboscis • no jaws or teeth • jaws present or absent • body elongate Order ARHYNCHOBDELLIDA Order RHYNCHOBDELLIDA • 5 pairs of eyes, forming a regular arch • jaws typically present and toothed (but may also be toothless or absent) • 1 to several pairs of gastric caeca Erpobdellidae • Most spp highly pigmented Glossiphoniidae Piscicolidae • Medium to very large, up to 200mm • body flat dorsoventrally • body cylindrical, usually • 3 or 4 pairs of and much wider than head divided into a narrow eyes, never (never cylindrical) anterior and wide arranged in posterior region • not differentiated into 2 regular arch Macrobdellidae Haemopidae: body regions: oral sucker • oral sucker distinctly ventral and more or less separated from body (formerly Hirudinidae) Haemopis • 0-2 pairs of eyes fused to body • jaws absent • 1-4 pairs of eyes • gastric caeca absent Ventral surface with • Ventral surface with either porous, gonopores only glandular region around gonopores or patch of glandular pores posterior to gonopores Large • body linear species • Young cling often to ventral • pigmented or not • No brooding • usually 20-50mm Usually mottled, side of adult very dark • Eggs in of eggs/young (occasionally over with 100mm) bright- or with a membranous • 6-30mm long median cocoon • parasites on fish coloured markings stripe -based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); by Michelle Dobrin, U of Windsor, 2017 HIRUDINEA: RHYNCHOBDELLIDA • Mouth a small pore in the oral sucker through which a muscular proboscis can be protruded • no jaws or teeth Glossiphoniidae Piscicolidae • body flat dorsoventrally • body cylindrical, usually divided into a and much wider than head (never cylindrical) narrow anterior and wide posterior region • • not differentiated into 2 oral sucker distinctly separated from body body regions: oral sucker • 0-2 pairs of eyes ventral and more or less fused to body • 1-4 pairs of eyes • Young cling to ventral side of adult • No brooding of • Eggs in eggs/young membranous • 6-30mm long cocoon • parasites on fish -based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); Blue text = by Michelle Dobrin, U of Windsor, 2017 HIRUDINEA: ARHYNCHOBDELLIDA only visible if dissected? • Mouth medium to large • no proboscis • jaws present or absent • body elongate • 5 pairs of eyes, forming a regular arch • jaws typically present and toothed (but may also be toothless or absent) Erpobdellidae • 1 to several pairs of gastric caeca • most spp highly pigmented • medium to very large, up to 200mm • 3 or 4 pairs of eyes, never arranged in regular arch • jaws absent • gastric caeca absent • body linear Macrobdellidae Haemopidae: • pigmented or not (formerly Hirudinidae) Haemopis • usually 20-50mm (occasionally over 100mm) • Ventral surface with • Ventral surface with either porous, gonopores only glandular region • large species around gonopores or gonopores • often mottled, very dark patch of glandular gonopores or with a median stripe pores posterior to copulatory gonopores gland • Usually with bright- coloured markings General anatomy/structures of Hirudinea.
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