ACTINOCORALLIA GEN-NOV, A NEW GENUS OF THE ORDER ACTINOMYCETALES

One species of the new genus Actillocorallin, Actinocorallin herbida sp. nov., is described. The genus Actinocorallia is characterized by well-developed, branched, nonfragmented substrate mycelia. On the tips of unique coralloid sporophores, which arise from the substrate mycelia, long chains of nonmotile spores (more than 30 spores per chain) are borne. On rare occasions formation of coremia is observed. The chemotaxonomic characteristics of this organism are as follows: the cell wall chemotype is type III (meso-diaminopimelic acid), the whole-cell sugar pattern is type C (no diagnostic sugar type), the fatty acid pattern is type la (straight chain saturated acids and monounsaturated acids), the predominant isoprenoid quinones are MK-9(H-4) and MK-9(H-6), phospholipid type PII (phosphatidylethanolamine) is present as the diagnostic polar lipid, the N-acyl type of muramic acid in the cell wall is the acetyl type, and the guanine-plus-cytosine content of the DNA is 73 mol%. The type strain of A. herbida is strain AL-50780 (= IFO 15485).