velvet worms造句

• The two extant families of velvet worms are Peripatidae and Peripatopsidae.
• Velvet worms have been known to live for up to six years.
• One organism, the velvet worm, produces nonylphenol as a component of its defensive slime.
• The modern velvet worms form a monophyletic group, incorporating all the descendants of their common ancestor.
• In 2009 a retired British velvet worms through hybridogenesis with other organisms, giving rising to holometabolan species.
• Velvet worms are considered close relatives of the Arthropoda and Tardigrada, with which they form the taxon Panarthropoda.
• Velvet worms literally creep up on their prey, with their smooth, gradual and fluid movement escaping detection by predators.
• The other group of legged terrestrial invertebrates, the velvet worms, have soft stumpy legs supported by a hydrostatic skeleton.
• It is considered by some to represent an early ancestor of the living velvet worms, although other researchers favour a relationship closer to arthropods.
• Flatworms, ribbon worms, velvet worms and annelids all depend on more or less moist habitats, as do the Arthropods centipedes and millipedes.
• Troglomorphism occurs in molluscs, velvet worms, arachnids, myriapods, crustaceans, insects, fish, amphibians ( notably cave salamanders ) and reptiles.
• Some species of invertebrate have even more legs, the unusual velvet worm having stubby legs under the length of its body, with around several dozen pairs of legs.
• The prolegs that some caterpillars have in addition to their six more-standard arthropod legs have a similar form to those of velvet worms, and suggest a distant shared ancestry.
• Proponents of this hypothesis assume that the aforementioned similarities between annelids and velvet worms either developed convergently or were primitive characteristics passed unchanged from a common ancestor to both the Lophotrochozoa and Ecdysozoa.
• *" . . . including one species of Peripatus ( velvet worm ) believed to be endemic to the Dunedin area . " If the worm is found in other areas ( eg.
• As part of the soil ecosystem, land planarians feed mainly on other invertebrates, such as earthworms, snails, slugs, nemerteans, velvet worms, woodlice, millipedes, insects and arachnids.
• The best-known is the type genus " Peripatus ", which was described as early as 1825 and which, in English-speaking countries, stands representative for all velvet worms.
• The area is home to kauri snails, glowworms and native velvet worms with 14 pairs of legs, and ovoviviparous species of 15 and 16 pairs of legs in the genus " Peripatoides ".
• The collectors of the first specimen requested it be named " totoro " as they were reminded of the multiple legged caterpillar-like Catbus in the film when they saw the crawling velvet worm.
• One problem of the Ecdysozoa hypothesis is the velvet worms'subterminal mouth position : unlike in the Cycloneuralia, the mouth is not at the front end of the body, but lies further back under the belly.