The hypochord is a transient rod-like structure in the embryos of fish, lampreys and amphibians that is located immediately ventral to the notochord. The hypochord may play a role in positioning the dorsal aorta[GO]. [ http://www.ncbi.nlm.nih.gov/pubmed/10648245 AAO : 0000733 http://amigo.geneontology.org/amigo/term/GO:0055016 https://www.worldcat.org/search?q=bn%3A0815318960 ]
Term information
- EFO:0003475
- XAO:0000056
- VHOG:0000081
- ZFA:0000031
- AAO:0000733
- TAO:0000031
efo_slim, dubious_grouping
- Unlike in frogs and axolotl, the hypochord does not appear to be endodermally derived[ZFA]. near metamorphosis the hypochord fuses to the coccyx, thereby forming the urostyle[AAO]
- The hypochord is a transient rod-like structure in the embryos of fish, lampreys and amphibians that is located immediately ventral to the notochord. The hypochord may play a role in positioning the dorsal aorta[GO].
- A transient rod-like structure which is endodermally derived and located immediately ventral to the notochord. The hypochord is thought to play a role in positioning the dorsal aorta. Eriksson and Lofberg, 2000.[TAO]
- Unsegmented ventral structure in the caudal region of anuran larvae; near metamorphosis the hypochord fuses to the coccyx, thereby forming the urostyle.[AAO]
- ipochord
- subnotochordal rod
- uberon
- In other words, we identified variations in gene expression patterns that may contribute to a molecular basis of evolutionary variation of axial structures between Teleostei and Mammalia in the determination of body axis. As already mentioned, one such difference is illustrated by the hypochord present in lower vertebrates but absent in higher animals. Perhaps, Tbx-b and Tbx-c are involved in the mechanisms underlying the formation of this organ that were lost during later evolution leading to the disappearance of the hypochord itself, similarly to other organs, such as the lateral line.[uncertain][VHOG]
- UBERON:0003058