Source:http://linkedlifedata.com/resource/umls/id/C2753489
GO: An organelle envelope that surrounds the chromosomes and the central part of the spindle apparatus during mitosis and meiosis; observed in many invertebrates. The spindle envelope consists of membrane layers, called parafusorial membranes, derived from endoplasmic reticulum membrane; in male meiosis it forms during prometaphase and persists until early in the ensuing interphase. [GOC:mah, GOC:sart, PMID:19417004, PMID:6428889]