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Prosipho Stilwelli
:''Prosipho may also refer to the precursor to a siphuncle in cephalopods.'' ''Prosipho'' is a genus of sea snails, marine gastropod mollusks in the family (biology), family Buccinidae, the true whelks. Species Species within the genus ''Prosipho'' include: * ''Prosipho amiantus'' Oliver & Picken, 1984 * ''Prosipho antarctidis'' (Pelseneer, 1903) * ''Prosipho astrolabiensis'' (Strebel, 1908) * ''Prosipho aurora'' Hedley, 1916 * ''Prosipho bisculpta'' Thiele, 1912 * ''Prosipho cancellatus'' Smith, 1915 * ''Prosipho certus'' Thiele, 1912 * ''Prosipho chordatus'' (Strebel, 1908) * ''Prosipho congenitus'' Smith, 1915 * ''Prosipho contrarius'' Thiele, 1912 * ''Prosipho crassicostatus'' (Melvill & Standen, 1907) * ''Prosipho daphnelloides'' Powell, 1958 * ''Prosipho elongatus'' Thiele, 1912 * ''Prosipho enricoi'' Engl, 2004 * ''Prosipho fuscus'' Thiele, 1912 * ''Prosipho gaussianus'' Thiele, 1912 * ''Prosipho glacialis'' Thiele, 1912 * ''Prosipho gracilis'' Thiele, 1912 * ''Prosipho g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siphuncle
The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusk. Only cephalopods with chambered shells have siphuncles, such as the extinct ammonites and belemnites, and the living nautiluses, cuttlefish, and ''Spirula''. In the case of the cuttlefish, the siphuncle is indistinct and connects all the small chambers of that animal's highly modified shell; in the other cephalopods it is thread-like and passes through small openings in the septa (walls) dividing the camerae (chambers). Some older studies have used the term siphon for the siphuncle, though this naming convention is uncommon in modern studies to prevent confusion with a mollusc organ of the same name. Function The siphuncle is used primarily in emptying water from new chambers as the shell grows. To perform this task, the cephalopod increases the saltiness of the blood in the siphuncle, and the water moves from the more dilute chamber into the blood through osmosis. At the sam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
