 However , in dinoflagellates , the nuclear envelope remains intact , the centrosomes are located in the cytoplasm , and the microtubules come in contact with chromosomes , whose centromeric regions are incorporated into the nuclear envelope ( the so @-@ called closed mitosis with extranuclear spindle ) . In many other protists ( e.g. , ciliates , sporozoans ) and fungi , the centrosomes are intranuclear , and their nuclear envelope also does not disassemle during cell division . 
 However , in dinoflagellates , the nuclear envelope <a href='uninflect' title='1'><mark>remains</mark></a> intact , the centrosomes are located in the cytoplasm , and the microtubules come in contact with chromosomes , whose centromeric regions are incorporated into the nuclear envelope ( the so @-@ called closed mitosis with extranuclear spindle ) . In many other protists ( e.g. , ciliates , sporozoans ) and fungi , the centrosomes <a href='drop_aux' title='2'><mark>are</mark></a>intranuclear , and their nuclear envelope also <a href='uninflect' title='3'><mark>does</mark></a> not disassemle during cell <a href='negative_concord' title='4'><mark>division</mark></a> . 
However , in dinoflagellates , the nuclear envelope remain intact , da centrosomes are located in tdacytoplasm , and the microtubules come in contact with chromosomes , whose centromeric regions are incorporated into the nuclear envelope ( thdaoo @-@ called closed mitosis with extranuclear spindle ) . In many other protists ( e.g. , ciliates , sporozoans ) and fungi , the centrosomes intranuclear , and their nuclear envelope also do not disassemle durin cell no division .