Taxonomy of Cnidarians Flashcards
What is the phylum that includes animals with stinging cells?
Cnidaria
What is the name of the specialized stinging cell found in all Cnidarians?
Cnidocyte
What is the difference between a cnidocyte and a nematocyst?
Cnidocytes are the specialized stinging cells; nematocysts are the harpoon-like organelles.
What are the two basic body forms of Cnidarians?
Polyp and Medusa
What kind of symmetry do Cnidarians have?
Radial symmetry
What are the 6 classes of Cnidaria?
- Hydrozoa
- Anthozoa
- Scyphozoa
- Cubozoa
- Staurozoa
- Myxozoa
Which microscopic, parasitic class was once thought to be protists?
Myxozoa
Which class includes true jellyfish?
Scyphozoa
Which class includes sea anemones and corals?
Anthozoa
Which class includes stalked jellyfish that are sessile and attach to substrates with a stalk-like structure?
Staurozoa
Which class includes colonial hydroids and the Portuguese man o’ war?
Hydrozoa
Which class includes box jellyfish with complex eyes?
Cubozoa
What are the 3 subclasses of Anthozoa?
- Hexacorallia
- Octocorallia
- Ceriantharia
Which subclass includes tube anemones with long tentacles?
Ceriantharia
Which subclass includes hard (reef-building) corals and sea anemones?
Hexacorallia
Which subclass includes soft corals, gorgonians, and sea pens?
Octocorallia
What are the 5 orders of Hexacorallia?
- Actiniaria
- Corallimorpharia
- Scleractinia
- Zoantharia
- Antipatharia
Which order includes reef-building stony corals?
Scleractinia
Which order includes sea anemones?
Actiniaria
Which order includes colonial anemones with embedded sand or debris?
Zoantharia
Which order resembles stony corals but lacks a calcium carbonate skeleton?
Corallimorpharia
Which order includes black corals with thorny skeletons?
Antipatharia
