Colton Kessenich's paper showing that Bolidomonas is haploid was just published
in Journal of Phycology. Bolidomonas is a flagellated unicell that is sister to diatoms. The results strongly suggest that the silicified Parmales are the diploid phase of a haplodiplontic life cycle in that lineage, making the diplontic life cycle of diatoms all the more interesting. Bolidomonas was discovered in 1997 by Laure Guillou, who wrote a nice piece highlighting our study.