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Flashcards about Annelids
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Annelids
Segmented worms
Polychaeta
Marine worms
Oligochaeta
Earthworms
Hirudinea
Leeches
Annelida Synapomorphies
Epidermal, paired setae
Polychaeta Synapomorphies
Parapodia
Clitellata Synapomorphies
Clitellum
Metamerism
Segmental arrangement of body parts.
Tagmatization
Specialization of specific body regions
Class Polychaeta
Largest annelid class, mostly marine, cephalization in most, parapodia, well developed setae.
Parapodia
Fleshy projection from the body wall
Setae
Chitinous bristles that increase traction
Class Clitellata
Earthworms, leeches, clitellum, no parapodia, few or no setae.
Subclass Oligochaeta
Earthworms, primarily terrestrial or freshwater, few setae, no distinct head, no parapodia, primarily scavengers.
Subclass Hirudinea
Leeches, freshwater, marine, terrestrial, body 34 segments, setae reduced or absent, dorso ventrally flattened.
Palolo Worm
Samoan delicacy worm