Geodia exigua is a species of sponge that produces the sesquiterpene spiro compound exiguamide.The species was first described by Johannes Thiele in 1898. It is a marine organism known from Japan.
Sponges, the members of the phylum Porifera, are a basal Metazoa (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. The branch of zoology that studies sponges is known as spongiology.
Sesquiterpenes are a class of terpenes that consist of three isoprene units and often have the molecular formula C15H24. Like monoterpenes, sesquiterpenes may be acyclic or contain rings, including many unique combinations. Biochemical modifications such as oxidation or rearrangement produce the related sesquiterpenoids.
A spiro compound, or spirane, from the Latin spīra, meaning a twist or coil, is a chemical compound, typically an organic compound, that presents a twisted structure of two or more rings, in which 2 or 3 rings are linked together by one common atom, examples of which are shown at right.
Johannes Thiele, full name Karl Hermann Johannes Thiele was a German zoologist specialized in malacology. Thiele was born in Goldap, East Prussia. His Handbuch der systematischen Weichtierkunde is a standard work. From 1904 until his retirement in 1925 he was the curator of the malacological collection at the Museum für Naturkunde in Berlin. Thiele described more than 1.500 new species of molluscs; until today their types are deposited with the Museum of Natural History in Berlin. Especially important are his works on the Mollusca of the First German Antarctica Expedition and of the German Deep Sea Expedition aboard the vessel Valdivia.
Geodia is a genus of sea sponge belonging to the family Geodiidae. It is the type genus of its taxonomic family.
Nucula is a genus of very small saltwater clams. They are part of the family Nuculidae.
Emarginula is a genus of small keyhole limpets, marine gastropod molluscs in the family Fissurellidae.
Solariella is a genus of small to minute sea snails, marine gastropod molluscs in the family Solariellidae within the superfamily Trochoidea, the top snails, turban snails and their allies.
Lissotesta is a genus of minute sea snails or micromolluscs, marine gastropod molluscs, unassigned in the superfamily Seguenzioidea.
Cratena is a genus of sea slugs, aeolid nudibranchs, marine gastropod molluscs in the family Facelinidae.
Eubela aequatorialis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Mangelia is a large genus of sea snails, marine gastropod mollusks in the family Mangeliidae. There have been many described species, many of which have become synonyms. Among the remaining accepted names a good number are still in doubt and are little known. They are only tentatively placed within the genus Mangelia.
Bela is a genus of sea snails; marine gastropod mollusks in the family Mangeliidae.
Ancilla, common name the ancillas, is a genus of sea snails, marine gastropod mollusks in the family Olividae.
Rissoa is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae.
Geodiidae is a family of sea sponges.
G. exigua may refer to:
Leptogorgia exigua is a coral species first described by Addison Emery Verrill in 1870. Verrill initially considered this species a diminutive variant of L. cuspidata, but ultimately decided to consider L. exigua a separate species. It is native to the Pacific Ocean.
Cetoconcha is the only extant genus of saltwater clams in the family Cetoconchidae.
Geodia agassizi is a species of sponge in the family Geodiidae. The species is found in the eastern tropical Pacific Ocean and was first described by Robert Lendenfeld in 1910.
Geodia alba is a species of sponge in the family Geodiidae. The species is found in the waters of Indonesia and was first described by Oswald Kieschnick in 1896 as Synops alba.
Mangelia exigua is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
Geodia atlantica is a species of sponge in the family Geodiidae. It is found in the waters of the North Atlantic Ocean.
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