psychroflexus tropicus psychroflexus tropicus psychroflexus tropicus is an obligately halophilic cytophaga–flavobacterium–bacteroides group bacterium. it is gram-negative, fine rod- to short filament-shaped, with type strain la1t (=atcc baa-734t =dsm 15496t). psychroflexus tropicus scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: psychroflexus species: p. tropicus binomial name psychroflexus tropicusdonachie et al. 2004