Monographs Details: Anacystis compacta 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:Microcystaceae
Description:Species Description - Colonies spherical to irregular in outline, free, 25-60 µ diam.; cells slightly angular, closely packed together in the juvenile stage, becoming rounded, almost spherical, at maturity, 4.5-5.5 µ diam., bright aeruginous, homogeneous; resting spores subspherical, with a conspicuous, smooth wall, 6-6.5 µ diam.; tegument firm, smooth, homogeneous, close-fitting, hyaline when young, becoming yellowish or brown.

Distribution and Ecology - Growing on bark of a tree trunk, in Caguas, no. 439, type.

Discussion:

This species may be distinguished from others by the closely compacted, angular, bright blue-green cells embedded within a close-fitting, firm tegument, hyaline in juvenile stage, becoming yellow or brown at maturity.