WebThe Placozoa / p l æ k ə ˈ z oʊ ə / are a basal form of marine free-living (non-parasitic) multicellular organism. They are the simplest in structure of all animals. Three genera have been found: the classical Trichoplax adhaerens, Hoilungia hongkongensis, and Polyplacotoma mediterranea, where the last appears most basal.The last two have been …

WebArachnida (/ ə ˈ r æ k n ɪ d ə /) is a class of joint-legged invertebrate animals (), in the subphylum Chelicerata.Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. Almost all adult arachnids have eight legs, although the front pair of legs in some species has …

WebEtymology. The word "animal" comes from the Latin animalis, meaning 'having breath', 'having soul' or 'living being'. The biological definition includes all members of the kingdom Animalia. In colloquial usage, the term animal is often used to refer only to nonhuman animals. The term "metazoa" is from Ancient Greek μετα (meta, used to mean "later") and …

WebIl giaguaro (Panthera onca Linnaeus, 1758) è un mammifero carnivoro della famiglia dei felidi. È il più grosso felide americano e il terzo più grande del mondo dopo la tigre e il leone.. Il nome di questo animale deriva dalla parola yaguar, nome attribuitogli dagli indios guaraní e che significa "colui che uccide con un balzo" in riferimento alla tattica di caccia …

WebOnychophora / 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 …

WebThe Sipuncula or Sipunculida (common names sipunculid worms or peanut worms) is a class containing about 162 species of unsegmented marine annelid worms.The name Sipuncula is from the genus name Sipunculus, and comes from the Latin siphunculus meaning a "small tube".. Sipuncula was once considered a phylum, but was demoted to …

WebSponges, the members of the phylum Porifera (/ p ə ˈ r ɪ f ər ə /; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.. Sponges have …

WebArthropod exoskeletons are made of cuticle, a non-cellular material secreted by the epidermis. Their cuticles vary in the details of their structure, but generally consist of three main layers: the epicuticle, a thin outer waxy coat that moisture-proofs the other layers and gives them some protection; the exocuticle, which consists of chitin and chemically …

WebCentipedes are predominantly generalist predators, which means they have adapted to eat a variety of different available prey. Examination of centipede gut contents suggests that plant material is an unimportant part of their diets, although centipedes have been observed to eat vegetable matter when starved during laboratory experiments.

WebAt the front of the body is the gnathosoma or capitulum. This is not a head and does not contain the eyes or the brain, but is a retractable feeding apparatus consisting of the chelicerae, the pedipalps and the oral cavity. It is covered above by an extension of the body carapace and is connected to the body by a flexible section of cuticle.The mouthparts …