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Invertebrate Phylums
Invertebrate Phylum Descriptions
| Question | Answer |
|---|---|
| Porifera | sponges |
| Porifera | primitive, sessile, mostly marine, water dwelling filter feeders that pump water through their bodies to filter out particles of food matter |
| Porifera | With no true tissues, they lack muscles, nerves, and internal organs. There are over 5,000 modern species known, and they can be found attached to surfaces anywhere from the intertidal zone to as deep as 8,500 meters (29,000 feet) or further. |
| Cnidarians | jellyfish, corals, sea anemones |
| Cnidarians | phylum containing some 11,000 species of relatively simple animals found exclusively in aquatic, mostly marine, environments |
| Cnidarians | get their name from cnidocytes, which are specialized cells that carry stinging organelles. The corals, which are important reef-builders, belong here, as do the familiar sea anemones and jellyfish. |
| Platyhelminthes | flatworms |
| Platyhelminthes | The flatworms are relatively simple soft-bodied invertebrates. With about 25,000 known species they are the largest phylum of acoelomates. |
| Platyhelminthes | Flatworms are found in marine, freshwater, and even damp terrestrial environments. Most are free-living forms, but many are parasitic on other animals. They include flukes and tapeworms. |
| Invetebrate Chordates | Tunicates (subphylum Urochordata or subphylum Tunicata) are marine, barrel-shaped invertebrates of the phylum Chordata. covered by a tough covering, or tunic, and also are called sea squirts, because they squirt out water when touched |
| Invetebrate Chordates | have a notochord, a hollow dorsal nerve cord, and pharyngeal slits ; have a notochord and dorsal nerve cord as larvae and retain gill slits in both the larval and adult stages Unlike vertebrates,lack a backbone or vertebral column. |
| Invetebrate Chordates | lancets,tunicates |
| Annelida | earthworms |
| Annelida | comprise the segmented worms, with about 15,000 modern species, including the well-known earthworms and leeches |
| Annelida | found in most wet environments, and include many terrestrial, freshwater, and especially marine species (such as the polychaetes), as well as some which are parasitic or mutualistic. They range in length from under a millimeter to over three meters |
| Echinodermata | sea star, sea urchins, sea cucumbers |
| Echinodermata | phylum of marine invertebrates found at all depths. This phylum appeared in the early Cambrian period and contains about 7,000 living species and 13,000 extinct ones. |
| Echinodermata | include starfish, sea daisies, crinoids, sea urchins, sand dollars, sea cucumbers, and brittle stars ;the largest animal phylum to lack any freshwater or terrestrial representatives. |
| Mollusca | squid, snails |
| Mollusca | a large and diverse phylum, which includes a variety of familiar animals well-known for their decorative shells or as seafood |
| Mollusca | range from tiny snails, clams, and abalone to squid, cuttlefish and the octopus;112,000 species ;giant squid, which until recently had not been observed alive in its adult form, is the largest invertebrate;possible that the colossal squid is even larger |
| Arthropoda | insects, ticks, spiders, grasshoppers, lobsters, crabs |
| Arthropoda | the largest phylum of animals and include the insects, arachnids, crustaceans, and others. More than 80 percent of described living animal species |
| Arthropoda | common throughout marine, freshwater, terrestrial, and even aerial environments, as well as including various symbiotic and parasitic forms. They range in size from microscopic plankton up to forms several meters long |
| Arthropoda | characterized by segmented body with appendages on each segment;have a dorsal heart and a ventral nervous system;covered by hard exoskeleton made of chitin which provides physical protection and resistance to desiccation. |
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YoungbloodScience
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