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Phylum Annelida-Ring worms. • marine, fresh water & moist land habitats. • Protostomian coelomates. • Vermiform, worm like. • Soft bodied. • Round in cross section. • Metameric segmentation with septa between segments: replication of organs. • Locomotion is a function of circular and longitudinal muscle contraction in
Introduction. When people think of worms, they often think about earthworms, or perhaps intestinal parasites - those creepy things we'd rather not imagine living inside us. Unless they have spend time sampling ponds and mud flats, or scuba diving on coral reefs, few people realize that one group of worms, the annelids, is.
Learning outcomes. • Describe the characteristics of animals belong to Phylum Annelida. • Describe the characteristics of animals belong to Class Polychaeta. • Discuss adaptations of polychaetes to diverse modes of life.
Segmented Worms. Characteristics. - Segmentation. - Chaetae (Hairs made of Chitin. - 3 Cell Layers. - True Coelom. - Head develops first (Protostomal). Annelida Has 3 Major Classes. 1. Polychaeta (Poly – keet - a) a. Poly = Many, Chaetae = hairs. 2. Oligochaeta (Oligo – keet – a) a. Oligo = few. 3. Hirudinea a. = Leeches!
Animals: Phuylum Annelida; Ziser Lecture Notes, 2015.10. 1. Phylum Annelida. (segmented worms, bristle worms). 15,000 species large successful phylum in water & on land include earthworms, sand worms, bristle worms, clam worms, fan worms, leeches worldwide distribution: marine, brackish, freshwater and terrestrial.
On Jan 1, 2014, M. Teresa Aguado (and others) published the chapter: 22. Annelida in the book: The Tree of Life: Evolution and Classification of Living Organisms.
83255-000 Pontal do Parana, Parana, Brasil. Respective e-mails: agarraffoni@lycos.com and gsene@lycos.com. ABSTRACT. Polychaetes are metameric worms recognized for having parapodia, chaetae, and nuchal organs. Some authors have extended the Annelida to include Pogonophora, Echiura, and Clitellata.
17 Aug 2015 On Sep 1, 2015, Christoph Bleidorn (and others) published the chapter: Annelida in the book: Evolutionary Developmenal Biology of Invertebrates 2, 1. Edition.
Septum – partially isolates segments from one another. Circular muscles – generate waves of contraction to allow the body to move forward. Chetae - stiffened hairs that anchor in the substrate and aid in locomotion. Ventral nerve cord. Mouth. Cerebral ganglion –"brain". Pharynx. Clitellum – thickened tissue used in
Animal Diversity II. Phylum Annelida and Phylum Arthropoda. Today we will study the annelids, the segmented worms, and the arthropods, a huge group that contains insects, spiders, and crustaceans. Three tissue layers are present in both of these groups. Also, they share with molluscs the presence of a true coelom.

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March 2018