Term
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Definition
| Phylum: Annelida, Class Polychaeta, Genus: Arenicola Common Name: Lugworm |
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Term
| Characteristics of Phylum Annelida |
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Definition
1. Segmented worms
2. True coelem, complete digestive tract, usually closed circulatory system
3. Nephridia for excretion
4. Well-developed muscles
5. Either dioecious or hermaphroditic |
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Term
| Characteristics of Class Polychaeta |
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Definition
Polychaeta ("many long hairs"
Many setae (bristles), usually protruding in bundles. Pronounced differentiation of some body segments, well-differentiated head with sensory appendages.
Parapodia (lateral fleshy extensions) on most segments. Used for primitive gills or respiratory organs, anchors while in tubes, crawling, and swimming. |
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Term
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Definition
| Phylum: Annelida, Class: Polychaeta, Genus: Nereis. Common name: Clamworm |
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Term
| Characteristics of Class Hirudinea |
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Definition
Hirudinea ("characterized by being a leech"
1. No setae or parapodia
2. Many transverse grooves, creating appearance of more segments than it actually has.
3. Well-developed midgut with ceca (blind-ended pouches). Ceca allow for storage of food so the leech may be able to go months without eating.
4. Have suckers.
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Term
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Definition
| Phylum: Annelida, Class: Hirudinea, Genus: Haemopis Predatory, eats other leeches, oligochaetes, and snails. |
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Term
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Definition
Phylum: Annelida, Class: Hirudinea, Phylum: Macrobdella, Species: Macrobdella decora
Common name: Medical leech
Parasitic, feeds primarily on frog blood. |
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Term
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Definition
| Phylum: Annelida, Class: Hirudinea, Genus: Theromyzon Found in the nasal cavities of water birds like ducks and American coots. Blood sucker. |
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Term
| Characteristics of Class Oligochaeta |
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Definition
Oligochaeta ("few long hairs")
Includes earthworms
1. Segmented worms with few setae and a clitellum.
2. No compound eyes, mouth parts, or appendages.
3. Cutaneous respiration. |
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Term
| Earthworm anatomy: know setae, prostomium, mouth, clitellum, internal septa, pharynx, esophagus, crop, gizzard, intestine, anus, dorsal blood vessel, "hearts", seminal receptacles, and seminal vesicles |
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Definition
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Term
| Earthworm cross-section anatomy: epidermis, longitudinal and circular muscles, ventral nerve cord, intestine, nephridium, dorsal blood vessel, and typhlosole. |
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Definition
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Term
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Definition
Phylum: Tardigrada
Common name: Water bears
Interesting fact: can survive up to 10 days in vacuum of space while dormant. |
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Term
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Definition
| Phylum: Ectoprocta ("outside anus") |
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