Monographs Details: Chroococcus cubicus 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 - Cells associated into families of 2-4, free among other algae, not forming a stratum alone; single cells with tegument 1.8-2.5 µ diam., spherical to somewhat irregular in outline, very pale aeruginous, homogeneous; families of 4 with tegument 6-7 µ diam., approximately cuboidal; tegument homogeneous, hyaline.

Distribution and Ecology - Growing in abundance among other species of Myxophyceae on a wooden fence, at Hotel Nava, Santurce, no. 3, type, and nos. 2, 4a, 5, 142, and 143 a. It was also found growing on various kinds of rock and walls in the following numerous localities: San Juan, nos. 66 a, 92 b, 1993 a, 1999, 2004 c, 2007, 2011 and 2021 c; Eio Piedras, no. 177; Coamo Springs, nos. 254 a, 307 a, 313, 402 b, 409 b; Fajardo, nos. 682 a, 713, 717 a, 734 a, and 736 a; Palermo, no. 755; Laguna Tortuguero, nos. 871 and 872; Sabana Grande, no. 923 a; Mayagiiez, no. 982 b ; Maricao, nos. 1050,1060, 1061 and 1190; Arecibo, nos. 1337, 1363, 1368, 1372 b, 1457 and 1462; Guanica, nos. 1838 and 1841 a

Discussion:

PLATE 1, FIGURE 12

This is an exceedingly diminutive, though distinct and wellmarked, species of Chroococcus. The sheath, or tegument, is very thin and hyaline. Frequently only one of the cells in a colony of two divides, leaving the colony triangular.