WebEnter the email address you signed up with and we'll email you a reset link. WebThe peristome is circular and central on the lower surface and it is here that the mouth opens. In life much of it is covered in a thick skin with embedded plates (the imbricate embedded plates are still in position in the specimen illustrated). ... This is a structure formed from the plates immediately surrounding the peristome, and forms the ...
Peristome definition of peristome by Medical dictionary
Webperistome in British English (ˈpɛrɪˌstəʊm ) noun 1. a fringe of pointed teeth surrounding the opening of a moss capsule 2. any of various parts surrounding the mouth of invertebrates, … Webmorphology including mouth, tube feet, spines and gills. Peristome and mouth Peristome consisted of a peripheral layer in red color (Fig. 2A) that was free of spines and a few small pedicellariae located on its surface (Fig. 2A). These pedicellariae were shown as small or medium size rods with a thicker head resembling a closed fork (Fig. 2A). holmes kyoto
The Echinoid Directory - Natural History Museum
Webnoun In zoology, mouth-parts in general; the structures or set of parts which surround the cavity of the mouth or oral opening and constitute its walls, framework, or skeleton: used chiefly of lower animals, as echinoderms, which have circular or radiate mouth-parts. from the GNU version of the Collaborative International Dictionary of English. WebNepenthes inermis is commonly known for its unique upper pitchers. They are small, thin-walled, funnel-shaped, pure green, and significantly lacking in peristome. The name inermis comes from Latin, meaning “unarmed” – a play on the fact that upper pitchers are lacking a peristome. Suspended above the mouth of these 2 to 3.5 inch (5 to 9 cm) pitchers is a … In mosses [ edit] The first is termed haplolepidous and consists of a single circle of 16 peristome teeth. The second type is the diplolepidous peristome found in subclass Bryidae. In this type, there are two rings of peristome... See more Peristome (from the Greek peri, meaning 'around' or 'about', and stoma, 'mouth') is an anatomical feature that surrounds an opening to an organ or structure. Some plants, fungi, and shelled gastropods have peristomes. See more In pitcher plants, the peristome is a reflexed ring (or partial ring) of tissue that surrounds the entrance to the digestive tube in these plants. It often (for example in Cephalotus and Nepenthes) possesses sharp, overhanging 'teeth' which aid in prey retention. It is often … See more The peristome is the margin of the aperture of a gastropod shell. It is the edge of the lip of the shell. This part is sometimes reflected (turned back) or thickened once the … See more In mosses, the peristome is a specialized structure in the sporangium that allows for gradual spore discharge, instead of releasing them all at once. Most mosses produce a capsule with a lid (the operculum) which falls off when the spores inside … See more The basidiocarps of some gasteroid fungi - such as puffballs and earthstars - release spores through an apical opening that is termed a peristome and is variously delimited, its … See more The peristome is any of the structures or sets of parts that surround the mouth or invertebrates such as echinoderms or earthworms See more • Dictionary definition See more holmes mackillop limited