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Mollusca (məlŭs`kə), taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.Mollusks are soft-bodied, and most have a prominent shell. Photo: Woods Hole Oceanographic Institute Literal meaning: Without plates Common name: Solengaster: Shell: There is no shell, however spicules may be embedded in the cuticle. Aplacophora Home Page. Families and genera of all named Aplacophora, number of described species, and geographic and depth ranges of genera. Common Name: Mossy chiton Phylum Mollusca Class Polyplacophora. Subclass Chaetodermomorpha (Caudofoveata) Worm-shaped; covered by cuticle and … Etymology: ‘Apodo’ from apodus (lat.) Common Name: Lined chiton Phylum Mollusca Class Polyplacophora . They were once thought to be sea cucumbers, but were reclassified as molluscs due to their digestive system. 1831). Many organisms belonging to this phylum have a calciferous shell. During the expeditions of Guphil I, Guido & Philippe Poppe started photographing systematically all marine creatures. Aplacophora definition is - an order of Amphineura comprising wormlike mollusks in which the body is without calcareous plates but the mantle bears numerous calcified spicules over its entire surface. Environment: milieu / climate zone / depth range / distribution range Ecology Demersal. Home Page : Dr Paddy Ryan Contents : Contact Paddy: Ryan Photographic, 779 South … Use one field only. The name Aplacophora translates as "bearer of no shells". Please update your bookmarks accordingly. The monoplacophora, common name (deep-sea limpets) are a small, but ecologically important group of single-shelled molluscs. They have the ability to roll up much like an armadillo as a defence mechanism. We have moved all content for this concept to for better organization. The bodies are generally very soft and are covered by the hard exoskeleton.They can be found in terrestrial regions as well as in the depths of the seas.You will be amazed to know that the size of the molluscans can range from 20 metres to one millimetre, with a few microscopic animals too. The Polyplacophora’s common name is chitons, with the name of this group meaning "bearer of many plates". COMMON NAME SCIENTIFIC NAME YEAR BYCATCH POUNDS BYCATCH INDIVIDUALS BYCATCH RATIO LANDINGS TOTAL FOOTNOTE(S) ABYSSAL GRENADIER Abyssal grenadier Coryphaenoides armatus 2012 315.18 Abyssal grenadier - landings ABYSSAL GRENADIER (Subtotal) 315.18 0.00 0.00 ALBACORE Albacore - North Pacific Thunnus alalunga 2012 11.00 Albacore Thunnus alalunga 2012 361.74 … (T/F) Molecular Data says chitons and aplacophora are related. Vernacular names [ edit ] The Solenogastres (less often referred to as Neomeniomorpha), common name the solenogasters, are one subclass of small, worm-like, shell-less molluscs (Aplacophora), the other subclass being the Caudofoveata (Chaetodermomorpha). Common name & details Cryptoconchus porosus : Butterfly chiton and seastar (New Zealand) Plaxiphora caelata "Hairy" chiton (New Zealand) Invertebrates [Next] Photo Library. Other articles where Aplacophora is discussed: mollusk: Annotated classification: Class Aplacophora Worm-shaped and without shells; marine, mostly in deep water. Etymology of Aplacophora: A = not or without, Plak = a plate or flat object, Phora = to bear (“Not having a shell”). Common Name… Examines the classification of mollusks. The apex of the shell is forward on the Monoplacophorans. Mollusks are soft-bodied invertebrates of the phylum Mollusca, usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body. 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