Ask the Chatbot Games & Quizzes ProCon History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture Money Videos
Trachylina
Directory
References
Discover
Chinese dragon sculpture or statue.
10 Legendary Creatures from Around the World
Thanksgiving Celebration Traditional Dinner Setting Food Concept
Why Is Thanksgiving in the U.S. Celebrated on a Thursday?
Secret Service Agent Listens To Earpiece
Secret Service Code Names of 11 U.S. Presidents
New York NY/ USA- November 23, 2018 Hordes of shoppers throng the Macy's Herald Square flagship store in New York looking for bargains on the day after Thanksgiving, Black Friday.
Why Is It Called Black Friday?
Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro
Why Is Christmas in December?
illustration of the walking titanosaurus, Patagotitan mayorum
Titanosaurs: 8 of the World's Biggest Dinosaurs
NBA Lakers Celtics Finals Kevin Garnett shooting.
10 Great Sports Rivalries

Trachylina

invertebrate order

Learn about this topic in these articles:

evolution and taxonomy

  • sea anemone
    In cnidarian: Evolution

    …ancient of cnidarian classes, and Trachylina is thought to be the most primitive extant order of that group. An alternative view is that anthozoans are the stem of the phylum, which evolved from bilateral flatworms and is secondarily simplified. A corollary to this theory is that the polyp is the…

    Read More
  • sea anemone
    In cnidarian: Annotated classification

    Order Trachylina Medusa dominant; reduced or no polyp stage. Statocysts and special sensory structures (tentaculocysts). Differ from other hydromedusae by having tentacles inserted above umbrellar margin. Oceanic, mostly warmer waters. Suborder Laingiomedusae Medusae with features of both Narcomedusae and Trachymedusae. Polyp unknown.

    Read More