ABSTRACT
In 1987, gram-positive bacteria with high G + C content were grouped to form a new class (Actinomycetes) composed of three groups: BiŠdobacteria, Propionibacteria, and Actinomycetales. The latter included several families, such as Pseudonocardiaceae, which shelters the genus Saccharopolyspora. The actinomycetes, which were included in the Actinomycetales family, were grouped for their ability to form branched hyphae during one of their division stage. S. rectivirgula mycelium, when mature, is fragmented into rods and cocci by septation and hyphae disarticulation. Actinomycetes harboring this characteristic are called “nocardioforms,” since species from the Nocardia genus exhibit the same characteristics.9
