Obelia, genus of invertebrate marine animals of the class hydrozoa (phylum cnidaria) the genus, widely distributed in all the oceans, is represented by many species the animal begins life as a polyp—a tentacled, stalklike form resembling a small sea anemone attached to the ocean bottom or some other solid surface. Phylum coelenterata (cnidaria) – - aquatic (marine), sessile or free living - presence of cnidoblasts or cnidocytes – stinging cells - cnidoblasts are for defence, anchorage or predation. Cnidaria, hydrozoa: latitudinal distribution of hydroids along the fjords region of southern chile, with notes on the world distribution of some species. Start studying animal, sponge, and cnidarian notes for test thursday learn vocabulary, terms, and more with flashcards, games, and other study tools. Cnidaria they have tissue organization and a body plan displaying radial symmetry that is, the organisms are circular with structures that radiate outward the ends of the structures have tentacles with stinging devices called cnidocyte that help in defense and in trapping food.
Study 55 chapter 34 - porifera, cnidaria, ctenophora, platyhelminthes, nemertea, nematoda, & rotifera flashcards from gre'nisha j on studyblue. Master notes on cnidarians:- 1protohydra 2halistemma 3physalia 4porpita 5velella 6diphyes cnidarian # 1 protohydra: protohydra (fig 1229a) is a peculiar hydra of 3 mm in length. A typical sea anemone is a sessile polyp attached at the base to the surface beneath it by an adhesive foot, called a basal or pedal disc, with a column-shaped body topped by an oral discmost are from 1 to 5 cm (04 to 20 in) in diameter and 15 to 10 cm (06 to 39 in) in length, but they are inflatable and vary greatly in dimensions.
Animals: phylum cnidaria ziser lecture notes, 20159 1413 gonads are epidermal in hydrozoa gonads are gastrodermal in other groups most shed gametes into water, often mass spawnings but one species of box jellyfish actually have a “wedding dance. Animals: phylum ctenophora ziser lecture notes, 20159 21 phylum ctenophora (comb jellies, sea walnuts) ctenophore = “to bear a comb” ~150 species unlike cnidarians’ nerve net, comb jellies have a more sophisticated nervous system with a rudimentary. Learn lecture notes biol biology cnidarians with free interactive flashcards choose from 500 different sets of lecture notes biol biology cnidarians flashcards on quizlet.
About 97% of all animals are invertebrates invertebrates are animals which do not have a backbonethere are nine phyla of invertebrates: porifera, cnidaria, platyhelminthes, nematoda, rotifera, mollusca, annelida, arthropoda, & echinodermata sponges. Classification of phylum cnidaria: the phylum cnidaria is a diverse group with cosmopolitan distribution it includes the familiar hydras, the transparent jelly fishes, the beautiful and  notes on zoology. Notes on some sertulariid hydroids (cnidaria: hydrozoa) from the tropical western pacific, with descriptions of nine new species. Class hydrozoa genus hydra examine the live specimens of hydra fuscus (brown hydra) and hydra viridens (green hydra has symbiotic algae) you can see the basal attachment disc, the body, and the tentacles with cnidoblasts surrounding the mouthsuch an attached life stage is called a polyphydra can glide slowly on its base or somersault by bending and placing the tentacles on the substratum.
Kingdom animalia: phyla porifera and cnidaria essential question(s): what are key characteristics to the animal kingdom objectives: 1 students will be able to distinguish essential characteristics in the animal kingdom note how your specimen moves across the petri dish this gliding movement is accomplished in part. Cnidaria a phylum that comprises the sea anemones, jellyfish, and corals, and which is known from the late precambrian cnidarians are basically radially symmetrical and have tentacles the body contains a gastrovascular cavity and the body wall is diploblastic. Cnidaria's genus name comes from the greek word 'knide,' meaning 'nettle' its species name ' omnimorph ' roughly translates to all forms this refers to the fact that it resembles many different species of jellyfish rather than just one.