obsolete endocytosis defective true FBcv:0001324 phenotypic_class Phenotype that is a defect in endocytosis (GO:0006897). 'endocytosis' is defined as: 'A vesicle-mediated transport process in which cells take up external materials or membrane constituents by the invagination of a small region of the plasma membrane to form a new membrane-bounded vesicle.' Obsoleted as this is phenotype is too molecular to be captured by FlyBase phenotype curation and will be captured by GO curation [FBC:CP]. abnormal endocytosis