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  1. Há 5 dias · Bilateria. O clado Bilateria inclui todos os metazoários que apresentam corpos organizados em um eixo antero-posterior (ou sagital) fazendo com que possam, em sua grande maioria, serem divididos em duas metades simétricas.

  2. en.wikipedia.org › wiki › CnidariaCnidaria - Wikipedia

    17 de jun. de 2024 · In 1881, it was proposed that Ctenophora and Bilateria were more closely related to each other, since they shared features that Cnidaria lack, for example muscles in the middle layer (mesoglea in Ctenophora, mesoderm in Bilateria).

    • No
    • No
    • Hydra, siphonophores
    • 3,600
  3. en.wikipedia.org › wiki › AnnelidAnnelid - Wikipedia

    Há 4 dias · The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms.

  4. en.wikipedia.org › wiki › CtenophoraCtenophora - Wikipedia

    26 de jun. de 2024 · It has been the focus of debate for many years. Ctenophores have been purported to be the sister lineage to the Bilateria, sister to the Cnidaria, sister to Cnidaria, Placozoa, and Bilateria, and sister to all other animals.

  5. Há 5 dias · Eumetazoa. Os animais incluídos no clado Eumetazoa são caracterizados por apresentarem o epitélio dividido em uma camada interna de células digestivas, a endoderme, e uma camada externa protetiva, ou dorsal, a ectoderme.

  6. 13 de jun. de 2024 · Annelid - Segmented Worms, Clitellates, Polychaetes: Classification of free-living and sedentary polychaetes relies almost exclusively on external characters, such as the shape of the head, and on the number and nature of structures, such as appendages, parapodia, and setae, and on tube construction.

  7. 20 de jun. de 2024 · Arthropods first appeared in the Cambrian and were represented by trilobites, merostomes, crustaceans, and enigmatic arthropods that do not fit into any existing subphyla. Trilobites, chelicerates, crustaceans, and myriapods are recognized as four major lines of arthropod evolution.