FN Archimer Export Format PT J TI New Perspective On The Haplosporidian Parasites Of Molluscs BT AF ARZUL, Isabelle CARNEGIE, Ryan B. AS 1:1;2:2; FF 1:PDG-RBE-SG2M-LGPMM;2:; C1 IFREMER, Lab Genet & Pathol, F-17390 La Tremblade, France. Coll William & Mary, Virginia Inst Marine Sci, Gloucester Point, VA 23062 USA. C2 IFREMER, FRANCE VIRGINIA INST MARINE SCI, USA SI LA TREMBLADE SE PDG-RBE-SG2M-LGPMM IN WOS Ifremer jusqu'en 2018 copubli-int-hors-europe IF 2.198 TC 62 UR https://archimer.ifremer.fr/doc/00275/38619/37149.pdf LA English DT Article DE ;Haplosporidium;Bonamia;Minchinia;MSX disease;Haplosporidiosis;Bonamiosis AB The protist phylum Haplosporidia comprises over 40 described species with representatives infecting a range of mollusc hosts, including several ecologically and economically significant pathogens. Continuing exploration of haplosporidian diversity has added ten new species in recent years and brought the phylogenetics of the group into somewhat clearer focus, with monophyletic Bonamia and Minchinia lineages continuing to be supported. However, the addition of new sequences to phylogenetic analyses has left the paraphyletic genus Haplosporidium’s picture less resolved. It is not clear that even two genera will be enough to accommodate the species presently drawn to the Haplosporidium regions of the haplosporidian tree. In this review, we summarize recent findings in haplosporidian diversity and phylogenetics, and provide a synthesis of our understanding of the life cycles and environmental influences on haplosporidians, with particular emphasis on the important pathogens Haplosporidium nelsoni and Bonamia ostreae. Additionally, we consider the evolution of the “microcell haplosporidian” lifestyle of Bonamia parasites, and suggest that colonization of high-density oyster host populations in relatively stable euhaline marine environments may have been an important development favoring the evolution of the microcell haplosporidian life strategy. PY 2015 PD OCT SO Journal Of Invertebrate Pathology SN 0022-2011 PU Academic Press Inc Elsevier Science VL 131 UT 000363077300004 BP 32 EP 42 DI 10.1016/j.jip.2015.07.014 ID 38619 ER EF