WebbLexikon der Biologie Nesseltiere. Nesseltiere, Cnidaria, nach früherer Systematik Stamm der Hohltiere (heute der Metazoa) mit den Gruppen Hydrozoa, Cubozoa ( Würfelquallen, früher als Scyphozoa betrachtet), Scyphozoa (Echte Quallen, Scheibenquallen, Discomedusen) und Anthozoa (Blumentiere, Blumenpolypen) mit ca. 8500 Arten. WebbThe life cycle of free-swimming Scyphozoan jellyfish typically consists of three stages. A sessile polyp (scyphistoma) stage asexually buds off young medusae from its upper end, with each such ephyra larva growing into an adult. The adults are either male or female, but in some species they frequently change their sex.
28.2: Phylum Cnidaria - Biology LibreTexts
Webb22 juni 2024 · Scyphozoa treten in der Regel in zwei Morphen auf (Polyp und Meduse = Qualle), die beide einen charakteristischen Bau aufweisen und über einen … Webb30 juni 2024 · Sexual reproduction occurs in the adult jellyfish and results in the free-swimming planula, which develops into the sessile scyphistoma (polyp). The polyp, which reproduces asexually by budding, develops into a strobila which, also asexually, produces free-swimming ephyrae (the initial medusoid stage) through transverse fission. rotarian relocation form
Polyp - Definition, Types and Causes Biology Dictionary
Webb11 juni 2024 · In the rhyzostome jellyfish Cassiopea spp., the scyphistoma (polyp stage) forms asexually produced vegetative buds, which detach from the polyp and metamorphose into new scyphistomae ( Bigelow, 1900; Hofmann and Honegger, 1990 ). Once polyps are infected with zooxanthellae, they form medusae via strobilation ( … WebbThe scyphistoma develops into a mature polyp called a STROBILA by an asexual process of reproduction called strobilization. The strobila shows transverse constrictions which eventually, near the oral surface, become complete and result in the budding off of the saucer-shaped EPHYRAE which subsequently develop into sexually mature Aurelia sp. … story tags-lit