Abstract
The cultural, biochemical and morphological characteristics of six cultures of Simonsiella and four cultures of Alysiella are described. The multicellular filaments of both Simonsiella and Alysiella (originally termed "disk-bacteria") are ribbon-like, non-sporing, non-branching, aerobic and Gram-negative. They are greater than 2 [beta] wide, exhibit gliding motility on solid media and ferment carbohydrates. The family Simonsiellaceae fam. nov. is proposed to include the genus Simonsiella Schmid and the genus Alysiella Langeron. Amended descriptions of the species Simonsiella crassa Schmid and of Alysiella filiformis (Schmid) Langeron are given.
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