clusters 1 and 6. Both Koonin et al.
5 and Santini et al.
have reported similar relationships between the genus
Phaecocytis and the Organic Lake phycodnaviruses.
Group 2 is made up of six Prasinophyceae species from
the family Phycodnaviridae, a genetically diverse but
morphologically similar group with an icosahedric capsid,
They have few genes in common, and thus appear to be an
The Prasinoviruses however, appear to be a monophyletic
clade, encompassing the genera Bathycoccus, Ostreococcus,
and Micromonas based on alignments of the DNA pol
9 Bellec et al.
9 found that the phylogenic position of
Emiliana huxleyi ‘virus’ is close to that of Prasinophyceae,
Figure 1. Heat map depicting Jaccard coefficients for pairs of NCLDV virus species which had protein sequences in the COG database. The Jaccard-Coefficient measures the common genes content between a given pair of NCLDV species. Lighter values correspond to higher values. Ten baramins
can be seen on the heatmap with 2–8 members each, listed in table 4.