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Nocardioides daphniae sp. nov., isolated from Daphnia cucullata (Crustacea: Cladocera)

¹ Eötvös Loránd University, Faculty of Science, Department of Microbiology, Pázmány Péter sétány 1/c, H-1117 Budapest, Hungary
² DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, D-38124 Braunschweig, Germany

Correspondence
Erika M. Tóth
totherika{at}ludens.elte.hu

A Gram-positive, rod-shaped or coccoid, yellow-pigmented bacterial strain, D287^T, was isolated from the water flea Daphnia cucullata (Crustacea: Cladocera) collected from Lake Balaton in Hungary. Phylogenetic analysis on the basis of 16S rRNA gene sequence comparisons revealed that the strain represented a distinct lineage within the cluster of the genera Nocardioides and Marmoricola. The following characteristics were consistent with the affiliation of strain D287^T to the genus Nocardioides: peptidoglycan based on LL-2,6-diaminopimelic acid, MK-8(H₄) as the major menaquinone, iso-C_{16 : 0} as the predominant cellular fatty acid, the presence of phosphatidylglycerol and diphosphatidylglycerol and a DNA G+C content of 69.9 mol%. Owing to characteristic differences in physiological traits and levels of 16S rRNA gene sequence similarity to its phylogenetically closest neighbours that were below 97 %, strain D287^T is considered to represent a novel species of the genus Nocardioides, for which the name Nocardioides daphniae sp. nov. is proposed. The type strain is D287^T (=DSM 18664^T=CCM 7403^T).

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