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4 giorni fa · A study in 2001 based on comparisons of ribosome DNA concluded that the most fundamental division within sponges was between glass sponges and the rest, and that Eumetazoa are more closely related to calcareous sponges (those with calcium carbonate spicules) than to other types of sponge.
5 giorni fa · Neanderthal, Neandertal, Paleantropo. Homo neanderthalensis ( King, 1864 ), comunemente detto uomo di Neandertal [1], è un ominide strettamente affine all' Homo sapiens che visse nel periodo Paleolitico medio, compreso tra i 200 000 e i 30 000 anni fa. [2]
9 apr 2024 · sponge, any of the primitive multicellular aquatic animals that constitute the phylum Porifera. They number approximately 5,000 described species and inhabit all seas, where they occur attached to surfaces from the intertidal zone to depths of 8,500 metres (29,000 feet) or more. The members of one family, the Spongillidae, are found in fresh ...
4 giorni fa · Eumetazoa: Clade: ParaHoxozoa: Phylum: Cnidaria Hatschek, 1888: Subphyla and classes; Subphylum Anthozoa—corals and sea anemone. Class Octocorallia; Class Hexacorallia; Class Ceriantharia; Subphylum Medusozoa—jellyfish and hydrozoans: Class Cubozoa—box jellyfish, sea wasps; Class Hydrozoa—hydroids, hydra-like animals; Class Polypodiozoa ...
2 giorni fa · Onychophora / ɒ n ɪ ˈ k ɒ f ə r ə / (from Ancient Greek: ονυχής, onyches, "claws"; and φέρειν, pherein, "to carry"), commonly known as velvet worms (due to their velvety texture and somewhat wormlike appearance) or more ambiguously as peripatus / p ə ˈ r ɪ p ə t ə s / (after the first described genus, Peripatus), is a phylum of elongate, soft-bodied, many-legged animals.
4 giorni fa · 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. Na linhagem que deu origem aos eumetazoários, as funções de transporte e de metabolismo realizadas pelas células ...
Ichthyotitan severnensis. Ichthyotitan este un gen extinct de ihtiozauri gigantici din Triasicul târziu ( Rhaetian ), cunoscut din Formațiunea Westbury Mudstone din Somerset, Regatul Unit. Se crede că este un șastasaurid, extinzând astfel perioada de viață a familiei cu 13 milioane de ani, până la ultimul Triasic.
