Evidence for a transient digestive tract in Vestimentifera
A medial process has been observed at the base of the branchial plume of juvenile vestimentiferans; this structure persists for only a short period in early developmental stages of the worms. In the youngest specimens observed there is a continuity from the distal, ciliated opening of the process to...
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| Veröffentlicht in: | Proceedings of the Biological Society of Washington 1988-08, Vol.101 (2), p.423-433 |
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| container_title | Proceedings of the Biological Society of Washington |
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| creator | JONES, M. L GARDINER, S. L |
| description | A medial process has been observed at the base of the branchial plume of juvenile vestimentiferans; this structure persists for only a short period in early developmental stages of the worms. In the youngest specimens observed there is a continuity from the distal, ciliated opening of the process to a posterior basal opening. This complete apparatus appears to be the mouth-gut-anus of the Vestimentifera, heretofore not observed. The ciliated opening (mouth) of the process connects with a ciliated duct (esophagus/foregut) which, in turn, leads to the presumptive trophosome (midgut), then into a spacious, thin-walled region (hindgut) and, finally, opens to the exterior via a posterior, terminal anus. In later stages the midgut is filled with presumptive endosymbiotic bacteria; its communication with the hindgut is lost, and the anal opening disappears. |
| format | Article |
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L ; GARDINER, S. L</creator><creatorcontrib>JONES, M. L ; GARDINER, S. L</creatorcontrib><description>A medial process has been observed at the base of the branchial plume of juvenile vestimentiferans; this structure persists for only a short period in early developmental stages of the worms. In the youngest specimens observed there is a continuity from the distal, ciliated opening of the process to a posterior basal opening. This complete apparatus appears to be the mouth-gut-anus of the Vestimentifera, heretofore not observed. The ciliated opening (mouth) of the process connects with a ciliated duct (esophagus/foregut) which, in turn, leads to the presumptive trophosome (midgut), then into a spacious, thin-walled region (hindgut) and, finally, opens to the exterior via a posterior, terminal anus. 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L</creatorcontrib><title>Evidence for a transient digestive tract in Vestimentifera</title><title>Proceedings of the Biological Society of Washington</title><description>A medial process has been observed at the base of the branchial plume of juvenile vestimentiferans; this structure persists for only a short period in early developmental stages of the worms. In the youngest specimens observed there is a continuity from the distal, ciliated opening of the process to a posterior basal opening. This complete apparatus appears to be the mouth-gut-anus of the Vestimentifera, heretofore not observed. The ciliated opening (mouth) of the process connects with a ciliated duct (esophagus/foregut) which, in turn, leads to the presumptive trophosome (midgut), then into a spacious, thin-walled region (hindgut) and, finally, opens to the exterior via a posterior, terminal anus. 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Psychology</subject><subject>Invertebrates</subject><subject>Less representative or incertae sedis groups: acanthocephala, chaetognatha, gnathostomulida, lophophoria, merostomata, mesozoa, myxozoa, nematorhyncha, pararthropoda, placozoa, priapuloidea, prochordata, pycnogonida, rotifera</subject><subject>Marine</subject><subject>Vestimentifera</subject><issn>0006-324X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><recordid>eNotj0tLAzEUhbNQsI7-hyzE3UBedzLjTkp9QKEbFXfDbXIjkXmZTAv-e6fY1YFzPg7nXLCVEKIqtTKfV-w6528hFEAFK_awOUZPgyMexsSRzwmHHGmYuY9flOd4pJPnZh4H_nEy-iWMgRLesMuAXabbsxbs_Wnztn4pt7vn1_XjtpykgbnUZE1T-dBUe9UoqYjAQUC0lijIxhNAY01t6yCxtntQPkBlSGpNXgcpdMHu_3unNP4clgltH7OjrsOBxkNuJUgr64Uv2N0ZxOywC8sVF3M7pdhj-m2tksYYrf8As8ZQqQ</recordid><startdate>19880823</startdate><enddate>19880823</enddate><creator>JONES, M. L</creator><creator>GARDINER, S. 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Psychology</topic><topic>Invertebrates</topic><topic>Less representative or incertae sedis groups: acanthocephala, chaetognatha, gnathostomulida, lophophoria, merostomata, mesozoa, myxozoa, nematorhyncha, pararthropoda, placozoa, priapuloidea, prochordata, pycnogonida, rotifera</topic><topic>Marine</topic><topic>Vestimentifera</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>JONES, M. L</creatorcontrib><creatorcontrib>GARDINER, S. L</creatorcontrib><collection>Pascal-Francis</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Proceedings of the Biological Society of Washington</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>JONES, M. 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| ispartof | Proceedings of the Biological Society of Washington, 1988-08, Vol.101 (2), p.423-433 |
| issn | 0006-324X |
| language | eng |
| recordid | cdi_proquest_miscellaneous_15171813 |
| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Biological and medical sciences Fundamental and applied biological sciences. Psychology Invertebrates Less representative or incertae sedis groups: acanthocephala, chaetognatha, gnathostomulida, lophophoria, merostomata, mesozoa, myxozoa, nematorhyncha, pararthropoda, placozoa, priapuloidea, prochordata, pycnogonida, rotifera Marine Vestimentifera |
| title | Evidence for a transient digestive tract in Vestimentifera |
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