Crinoids are marine animals that make up the class Crinoidea, one of the classes of the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. Those crinoids which, in their adult form, are attached to the sea bottom by a stalk are commonly called sea lilies, while the unstalked forms are called feather stars or comatulids, being members of the largest crinoid order, Comatulida. Adult crinoids are characterised by having the mouth located on the upper surface. This is surrounded by feeding arms, and is linked to a U-shaped gut, with the anus being located on the oral disc near the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, in most crinoids the five arms are subdivided into ten or more. These have feathery pinnules and are spread wide to gather planktonic particles from the water. At some stage in their lives, most crinoids have a stem used to attach themselves to the substrate, but many live attached only as juveniles and become free-swimming as adults. There are only about 600 living species of crinoid, but the class was much more abundant and diverse in the past. Some thick limestone beds dating to the mid-Paleozoic to Jurassic eras are almost entirely made up of disarticulated crinoid fragments. Etymology The name 'Crinoidea' comes from the Ancient Greek word (krnon), 'a lily', with the suffix oid meaning 'like'.
The size of the Hydrangea What Is Nature Fotografie is 178.84KB.
The resolution of the Hydrangea What Is Nature Fotografie is 400x359.
Keywords that define Hydrangea What Is Nature Fotografie are sun, like, cleanliving, calla, the nature conservatory, smile, marry, define natural, to the nature, bodyshope, fotografie, peony, nature wiki, what is nature, hydrangea, animals, lines on nature, skylovers, transparent, lis, lily, trout lily, png.
Cheap Fares All Inclusive Resorts
Barclays Fantasy League Premier League
Sundayfunday Eye Animal Natcher Web
Cartooning Cartoon Shows Cartoon Net
Cosplay Free Cartoons Online Cartoon
Current People Magazine Cover Evans
St. Brigid Girl Gal Find
Teatime Junk Foodshare Meal Ideas
Miscellaneous Example What Is Misc
Obey Arrangement Glaze Fantastic
Transportservice Tpt Transport Photos Transport
Premier League Fantasy Team Fantasyland
Zabaglione Fastfood Liqueur Eatfresh
Transparent World Sports News Today
Jordan Playing Michael Photos
Game Fantasy Magic Sci Crare
Electronic Stores That Buy Electronics
Plush Toon Cutie Doll
Cartoon Photo Shaver Cartoons For
Hd Movies Tonight New Movies
Background Revenge Vendetta Movies Playing
Pbs Nature Fleur Save Nature
Cartoon Cartoon Art Comics Online
Ecologia Pet Instalike Mochileros
Naturaleza Whale Blue Animals With
411 People Search Newborn Baby
Digital Radio Stations Online Web
Movies Out This Week Dumfounding
Music Music Sunglasses Musical Websites