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Anthaspidellidae
Anthaspidellidae is an extinct family of sponges whose dendroclone spicules form ladder-like trab A trab is a structural element within a sponge formed by the fusion of dendroclones. In the Anthaspidellidae, when spicules Spicules are any of various small needle-like anatomical structures occurring in organisms Spicule may also refer to: *S ...s. References Sponge families Tetractinomorpha {{demosponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capsospongia
''Capsospongia'', formerly known as ''Corralia'' or ''Corralio'', is a middle Cambrian sponge genus known from 3 specimens in the Burgess shale. Its type and only species is ''Capsospongia undulata''. It has a narrow base, and consists of bulging rings which get wider further up the sponge, resulting in a conical shape. Its open top was presumably used to expel water that had passed through the sponge cells and been filtered for nutrients. Like most sponges, ''Capsospoingia'' had a spicular skeleton; long spicules parallel to the growth direction formed columns which were connected by shorter lateral spicules. History ''Capsospongia undulata'' was named in 1920 by Charles Walcott as ''Corralia undulata''. However, the name was preoccupied by ''Corralia'' Roewer, 1913, a member of Opiliones. In 1955, de Laubenfels renamed the genus ''Corralio'', adopting an incorrect spelling of ''Corralia'' Walcott had used. In 1986 Keith Rigby established the new genus ''Capsospongia'' for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendroclone
Spicules are structural elements found in most sponges. The meshing of many spicules serves as the sponge's skeleton and thus it provides structural support and potentially defense against predators. Sponge spicules are made of calcium carbonate or silica. Large spicules visible to the naked eye are referred to as megascleres, while smaller, microscopic ones are termed microscleres. The composition, size, and shape of spicules are major characters in sponge systematics and taxonomy. Overview Sponges are a species-rich clade of the earliest-diverging (most basal) animals. They are distributed globally, with diverse ecologies and functions, and a record spanning at least the entire Phanerozoic. Most sponges produce skeletons formed by spicules, structural elements that develop in a wide variety of sizes and three dimensional shapes. Among the four sub-clades of Porifera, three ( Demospongiae, Hexactinellida, and Homoscleromorpha) produce skeletons of amorphous silica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trab
A trab is a structural element within a sponge formed by the fusion of dendroclones. In the Anthaspidellidae, when spicules Spicules are any of various small needle-like anatomical structures occurring in organisms Spicule may also refer to: *Spicule (sponge), small skeletal elements of sea sponges *Spicule (nematode), reproductive structures found in male nematodes ( ... (usually dendroclones) connect at their tips to form a ladder-like structure, trabs may be formed. Oxeas are sometimes employed in the central rod. Trabs have a feather-like structure, or may form rods. Trabs are usually regularly spaced, usually at sub-millimetric intervals. Further dendroclones may interconnect adjacent trabs, forming ladder-like structures. The presence and alignment of trabs is often related to the internal structure of canals within sponges. References Sponge anatomy {{sponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sponge Families
Sponges, the members of the phylum Porifera (; 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 unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes. Sponges were first to branch off the evolutionary tree from the last common ancestor of all animals, making them the sister group of all other animals. Etymology The term ''sponge'' derives from the Ancient Greek word ( 'sponge'). Overview Sponges are similar to other animals in that they are multicellular, het ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
