Description of Haplosporidium edule n. sp. (Phylum Haplosporidia), a parasite of Cerastoderma edule (Mollusca, Bivalvia) with complex spore ornamentation

Ultrastructural and molecular characterization of Haplosporidium montforti n. sp., parasite of the European abalone Haliotis tuberculata

“…The spore Wlaments observed in the present study have a similar origin to those in Haplosporidium parisi (Ormières, 1980), Haplosporidium comatulae (La Haye et al, 1984, H. lusitanicum (Azevedo, 1984), Haplosporidium armoricanum (Azevedo et al, 1999;Hine and Thorne, 1998), H. pickfordi (Burreson, 2001) and Haplosporidium edule (Azevedo et al, 2003). However, the types of spore wall ornamentations observed in the present study, characterized by the number of Wlaments, their length, insertion points on the wall and organization of the Wlaments, with diVerent types of transverse sections (L-like, T-like, and X-like sections), and which have not been observed previously, are clearly very diVerent from all the other ornamentations reported on spores of diVerent Haplosporidium spp.…”

“…The only taxonomic character used to distinguish between these two genera is the ultrastructural organization of the "ornaments" (Azevedo, 1984;Azevedo et al, 2003;Burreson, 2001;Flores et al, 1996;Hine and Thorne, 1998;McGovern and Burreson, 1990;Ormières, 1980;Reece et al, 2004). The genus Haplosporidium has been deWned as having spores with ornaments (tails, Wlaments or others terms used to designate similar structures) that originate from the spore wall and are composed of the same material that forms the spore wall (Azevedo, 1984;Azevedo et al, 1999;Burreson, 2001;Flores et al, 1996;Hine and Thorne, 1998;McGovern and Burreson, 1990;Reece et al, 2004).…”

“…The lack of a precise and detailed deWnition of the terms used to describe these structures has caused some taxonomic problems (Azevedo, 2001;Burreson, 2001;Flores et al, 1996;McGovern and Burreson, 1990). Beside some controversial opinions (see Burreson, 2001;Perkins, 1991Perkins, , 2000, the genus Haplosporidium has been deWned as species whose spores possess tails or Wlaments attached to the spore wall, which are formed by the same material as the wall (Azevedo et al, 1999(Azevedo et al, , 2003Burreson, 2001;Ciancio et al, 1999;Hine and Thorne, 1998;Ormières, 1980;Sprague, 1979;Taylor, 1986). On the other hand, Minchinia spp.…”

Spore ornamentation of Haplosporidium hinei n. sp. (Haplosporidia) in pearl oysters Pinctada maxima (Jameson, 1901)

“…Haplosporidium nelsoni and H. costale from Crassostrea virginica along the east coast of the United States do not have paired filaments arising from the posterior end of the spore; rather they have wrappings around the spore (Burreson and Reece, 2006). Haplosporidium edule from cockles in Europe has many knobbed extensions of the spore wall, not long filaments (Azevedo et al 2003).…”

Scanning Electron Microscopy and Molecular Characterization of A New Haplosporidium Species (Haplosporidia), A Parasite of the Marine Gastropod Siphonaria pectinata (Mollusca: Gastropoda: Siphonariidae) In the Gulf of Mexico

“…is most similar in spore dimension to Haplosporidium hinei Bearham et al, 2008 from Australian pearl oysters in that the latter was reported with a length of 3.5-4 mm and width of 2.5-3.0 mm. The next closest species in terms of spore dimensions are Haplosporidium costale Wood and Andrews, 1962 (,3.1 3 2.6 mm), Crassostrea virginica (Burreson and Reece, 2006), and Haplosporidium edule Azevedo et al, 2003 (3.2 3 2.2 mm) from cockles (Azevedo et al, 2003). None of these 3 haplosporidians has spore ornamentation resembling that exhibited by H. tuxtlensis.…”