Monographs Details: Anacystis irregularis N.L.Gardner
Authority: Gardner, Nathaniel L. 1927. New Myxophyceae from Porto Rico. Mem. New York Bot. Gard. 7: 1-144. pl. 1-23.
Description:Species Description - Colonies very variable in shape and size, up to 75 µ diam., closely associated into masses of considerable size, the teguments of the older colonies at times completely fusing; cells spherical, closely crowded together, 1.8-2.5 µ diam., bright aeruginous, homogeneous; resting spores with a very thin, smooth, hyaline wall; tegument close-fitting, hyaline, homogeneous throughout the colony.

Distribution and Ecology - Growing among other species of Myxophyceae on the trunks of trees, Coamo Springs, no. 300, type; on "Flytteblok" west of Ilumacao, no. 577 a; on rock near Hacienda Catalina, Palmer, no. 791 a; on lava rock by the road to Monto Montoro, Maricao, no. 1065 d.



As this species is piled together and at times in part confluent, it resembles Kuetzing's illustrations of Polycystis ichhyoblabe, but there is not the continuous colonial tegument, except in part where the colonies are old, characteristic of that species.