A physical cellular phenotype observed in the vegetative growth phase of the life cycle in which F-actin forms a large spot in the medial region of the cell, instead of assembling into a contractile ring. [ http://www.ncbi.nlm.nih.gov/pubmed/9635188 http://www.ncbi.nlm.nih.gov/pubmed/19713940 https://www.pombase.org/gene/mah ]
Synonyms: medial F-actin spot present during vegetative growth actomyosin contractile ring absent, with medial F-actin spot present