Ultrastructural characteristics and small subunit ribosomal DNA sequence of Vairimorpha cheracis sp. nov., (Microspora: Burenellidae), a parasite of the Australian yabby, Cherax destructor (Decapoda: Parastacidae). Journal of Invertebrate Pathology, 84(3), November 2003: 198-213. 211 [Zoological Record Volume 140]