Genus Actisecos Canu & Bassler, 1927

Type species: Actisecos regularis Canu & Bassler, 1927

Diagnosis. Colonies free, discoidal, small (no more than four zooidal generations were observed), slightly or strongly convex. Zooids small, elongated. Peristome long, cylindrical, swollen in the base, with pustulose surface. Primary orifice subcircular. Frontal shield centrally smooth or with sporadic tubercules that are more common on the periphery, with few (nine to 19) foramina. Basal pore chambers with 1–2 communication pore(s). Marginal pores absent. Basal autozooidal walls covered by flat kenozooids with large membranous area. No avicularia. Ovicells prominent, peristomial, terminal, developing exclusively in the peripheral zooids. Ectooecium membranous, entooecium pustulose with numerous pseudopores. Ancestrula is autozooidal in shape, surrounded by six zooids.