obsolete sperm connecting piece https://github.com/geneontology/go-ontology/issues/28003 true The reason for obsoletion is that this term is equivalent to GO:0120212 sperm head-tail coupling apparatus. GO:0097224 OBSOLETE. The segment of the sperm flagellum that attaches to the implantation fossa of the nucleus in the sperm head; from the remnant of the centriole at this point, the axoneme extends throughout the length of the flagellum. 2012-01-25T01:21:02Z pr cellular_component sperm head-tail coupling apparatus