Trochophores exist as a larval form within the trochozoan clade, which include the entoprocts, molluscs, annelids (including echiurans and sipunculans) and nemerteans. Together, these phyla make up part of the Lophotrochozoa; it is possible that trochophore larvae were present in the life cycle of the group's common ancestor.
Etymologyedit
The term trochophore derives from the ancient Greekτροχός (trókhos), meaning "wheel", and φέρω (phérō) — or φορέω (phoréō) —, meaning 'to bear, to carry',[3] because the larva is bearing a wheel-shaped band of cilia.
Feeding habitsedit
Trochophore larvae are often planktotrophic; that is, they feed on other plankton species.
The example of the development of the annelid Pomatoceros lamarckii (family Serpulidae) shows various trochophore stages (image: D-F): D - early trochophore ; E - complete trochophore ; F - late trochophore ; G - metatrochophore.
9-hour-old trochophore of the marine gastropod Haliotis asinina (sf - shell field)[5]Ontogeny of the Polyplacophora: First image shows the trochophore, second shows the stadium in metamorphosis, third is a juvenile (scanning electron microscope: SEM)
^McDougall, Carmel; Chen, Wei-Chung; Shimeld, Sebastian M.; Ferrier, David E. K. (2006). "The development of the larval nervous system, musculature and ciliary bands of Pomatoceros lamarckii (Annelida): heterochrony in polychaetes". Frontiers in Zoology. 3 (1): 16. doi:10.1186/1742-9994-3-16. PMC1615870. PMID 17032451.
^Jackson, Daniel J.; Wörheide, Gert; Degnan, Bernard M. (2007). "Dynamic expression of ancient and novel molluscan shell genes during ecological transitions". BMC Evolutionary Biology. 7 (1): 160. Bibcode:2007BMCEE...7..160J. doi:10.1186/1471-2148-7-160. PMC2034539. PMID 17845714.
External linksedit
Wikimedia Commons has media related to Trochophore.
Nielsen, Claus (2018-07-01). "Origin of the trochophora larva". Royal Society Open Science. 5 (7): 180042. Bibcode:2018RSOS....580042N. doi:10.1098/rsos.180042. ISSN 2054-5703. PMC6083724. PMID 30109065.
February 15, 2024
trochophore, trochophore, ɔːr, type, free, swimming, planktonic, marine, larva, with, several, bands, cilia, anatomy, trochophore, episphere, hyposphere, ganglia, apical, tuft, prototroch, metatroch, nephridium, anus, protonephridia, gastrointestinal, tract, b. A trochophore ˈ t r oʊ k e ˌ f ɔːr ˈ t r ɒ k oʊ 1 2 is a type of free swimming planktonic marine larva with several bands of cilia The anatomy of a trochophore A episphere B hyposphere 1 ganglia 2 apical tuft 3 prototroch 4 metatroch 5 nephridium 6 anus 7 protonephridia 8 gastrointestinal tract 9 buccal opening 10 blastocoeleBy moving their cilia rapidly they make a water eddy to control their movement and to bring their food closer in order to capture it more easily Contents 1 Occurrence 2 Etymology 3 Feeding habits 4 Life cycle 5 References 6 External linksOccurrence editTrochophores exist as a larval form within the trochozoan clade which include the entoprocts molluscs annelids including echiurans and sipunculans and nemerteans Together these phyla make up part of the Lophotrochozoa it is possible that trochophore larvae were present in the life cycle of the group s common ancestor Etymology editThe term trochophore derives from the ancient Greek troxos trokhos meaning wheel and ferw pherō or forew phoreō meaning to bear to carry 3 because the larva is bearing a wheel shaped band of cilia Feeding habits editTrochophore larvae are often planktotrophic that is they feed on other plankton species Life cycle edit nbsp Bright field microscope image of trochophore of annelid Pomatoceros lamarckii family Serpulidae 4 The example of the development of the annelid Pomatoceros lamarckii family Serpulidae shows various trochophore stages image D F D early trochophore E complete trochophore F late trochophore G metatrochophore nbsp 9 hour old trochophore of the marine gastropod Haliotis asinina sf shell field 5 nbsp Ontogeny of the Polyplacophora First image shows the trochophore second shows the stadium in metamorphosis third is a juvenile scanning electron microscope SEM References edit Trochophore Lexico UK English Dictionary Oxford University Press Archived from the original on 2020 03 22 Trochophore Dictionary com Unabridged Online n d Retrieved 2016 01 21 Bailly Anatole Greek french dictionary online www tabularium be Retrieved 2017 01 24 McDougall Carmel Chen Wei Chung Shimeld Sebastian M Ferrier David E K 2006 The development of the larval nervous system musculature and ciliary bands of Pomatoceros lamarckii Annelida heterochrony in polychaetes Frontiers in Zoology 3 1 16 doi 10 1186 1742 9994 3 16 PMC 1615870 PMID 17032451 Jackson Daniel J Worheide Gert Degnan Bernard M 2007 Dynamic expression of ancient and novel molluscan shell genes during ecological transitions BMC Evolutionary Biology 7 1 160 Bibcode 2007BMCEE 7 160J doi 10 1186 1471 2148 7 160 PMC 2034539 PMID 17845714 External links edit nbsp Wikimedia Commons has media related to Trochophore Nielsen Claus 2018 07 01 Origin of the trochophora larva Royal Society Open Science 5 7 180042 Bibcode 2018RSOS 580042N doi 10 1098 rsos 180042 ISSN 2054 5703 PMC 6083724 PMID 30109065 Retrieved from https en wikipedia org w index php title Trochophore amp oldid 1187565758, wikipedia, wiki, book, books, library,
