Renilla is related to corals but differs from them in that it is a collection of polyps having different forms and functions. Phylum? Cnidaria Class? Anthozoa Common name? Sea pansy Phylum? Cnidaria Class? Hydrozoa Body form? Polyp Obelia colony Feeding polyp Phylum? Cnidaria Class? Hydrozoa Reproductive polyp Medusa bud – produced asexually Phylum? Cnidaria What is this? This is an Obelia medusa as seen under a compound microscope Class? Hydrozoa How does this reproduce? Sexually by producing eggs or sperm Phylum? Cnidaria Class? Hydrozoa What is the significance of the velum in the taxonomy of this organism? The velum is a characteristic of hydrozoan jellies. Thus Gonionemus is in Class Hydrozoa A B C D A: Exumbrella B: Subumbrella Goniomenus C: Manubrium D: Velum A: Tentacles C: Gonad A B B: Oral arm C Phylum? Cnidaria Identify Cells Class? Hydrozoa Physalia Tentacle Cnidocytes with nematocysts Phylum Cnidaria Class Hydrozoa 2. Identify structure within cell PhysaliaPhylum Tentacle Cnidaria Class Hydrozoa Nematocyst Physalia1. Identify Tentacle cell Cnidocytes with nematocysts Cnidocyte Phylum Cnidaria Class Hydrozoa Physalia Tentacle Cnidocytes with undischarged? Nematocysts Tentacle: Note Cnidocytes Bud (Asexual Reproduction) Phylum? Cnidaria Class Hydrozoa Hydra -Polyp Phylum Cnidaria Class Hydrozoa Obelia What stage of the lifecycle does this represent? Medusa stage (Sexually Reproduces) Phylum Cnidaria Class Hydrozoa Polpys Obelia Colony – A Colony of? Reproductive Polyp Asexual Stage Medusa Bud Feeding Polyp Phylum? Class? Common Name? Cnidaria Hydrozoa Portuguese Man-of-War Common Name? By-the-wind sailor or Velella Common name? Phylum? Class? A B Phylum? Cnidaria Class? Scyphozoa Common Name? Moon Jellly Phylum? Class? Common Name? Cnidaria Anthozoa Sea Anemone Kingdom? Animalia Phylum? Ctenophora Common name? Comb Jelly How does this animal move? Via cilia. They have 8 rows of ciliated combs How does this animal capture its food? They have specialized cells called colloblasts on their tentacles that secrete a “glue-like” substance. A: Cnidocyte B: Epidermis C: Mesoglia B D: Gastrodermis C Gastrovascular cavity E: D A E What is this? Kingdom? Phylum? B Class? A C D E • Hydra • Kingdom Animalia • Phylum Cnidaria • Class Hydrozoa • A: Gastrodermis • B: Tentacle • C: Gastrovascular cavity • D: Epidermis • E: Gastrovascular cavity D A B C F E G Phylum? Class? What is this? Phylum Cnidaria Class Hydrozoa Obelia • A: Feeding polyp • B: Medusa bud • C: Tentacles • D: Medusa • E: Ciliated planula larva • F: Reproductive polyp • G: Obelia colony A E B C D Kingdom? Phylum? Class? Kingdom Animalia Phylum Cnidaria Class Scyphozoa (The Moon Jelly) • A: Exumbrella • B: Subumbrella • C: Mouth • D: Oral arms • E: Mesoglia B C A D • A: Feeding polyp • B: Reproductive polyp • C: Medusa • D: Ciliated planula larva B C D A E • A: Cnidocyte • B: Epidermis • C: Mesoglia • D: Gastrodermis • E: Gastrovascular cavity A B C D E F • A: Tentacle • B: Peristome • C: Mouth • D: Pharynx • E: Gastrovascular cavity • F: Basal disc Phylum? Class? B A C D E Gonionemus medusa Phylum Cnidaria Class Hydrozoa (It has a velum!) • A: Manubrium • B: Radial canal • C: Gonad • D: Velum • E: Tentalce Phylum? Class? Common name? A B C D E Phylum Annelida Class Polychaeta The Sandworm (A carnivorous predator) • A: Jaws • B: Tentacles • C: Segment • D: Parapodium • E: Setae B A C D F E • A: Eyes • B: Segments • C: Setae • D: Parapodium • E: Pharynx • F: Jaws.