Monographs Details: Chroococcus mediocris N.L.Gardner
Authority: Gardner, Nathaniel L. 1927. New Myxophyceae from Porto Rico. Mem. New York Bot. Gard. 7: 1-144. pl. 1-23.
Family:Chroococcaceae
Description:Species Description - Families composed of 2-4 cells, free, not forming a definite stratum alone; single cells spherical, bright aeruginous, finely granular; families of 4 very angular, 9-11.5 µ diam. without tegument, 15-18 µ diam. with the tegument; tegument hyaline, homogeneous, smooth.

Distribution and Ecology - Growing in association with numerous other species of algae in Laguna Tortuguero, no. 831 h, type.

Discussion:

PLATE 2, FIGURE 14

The species described above has a near relative, so far as size is concerned, in Chroococcus limneticus Lemm. The colonies do not adhere into a stratum and the individual tegument is thinner and is homogeneous, and there is no tegument investing groups of cells and colonies as in C. limneticus. It is also closely related to C. subsphericus of this paper.