title: Zschokkella helmii n. sp. (Myxozoa: Myxosporea), a new parasite of marbled spinefoot Siganus rivulatus (Forsskal 1775), Red Sea, Egypt: light and transmission electron microscopy.
abstract: Zschokkella helmii n. sp., a new parasite of Siganus rivulatus from the Red Sea, Egypt, was described using light and transmission electron microscopy. However, the infection was severe; single "histozoic" plasmodium was encountered in the gallbladder wall. Spores are ellipsoid with 9-11 valvar striations. Spore mean length is 10.8 microm (10.0-11.0), while the spore mean width is 7.5 microm (7.0-8.0). Polar capsules are nearly round with a diameter of 2.2 microm (2.0-3.0) and have five filaments. Ultrastructure of the plasmodial wall and sporogenesis of the present species followed the usual pattern valid for most studied myxosporean species.
authors.affiliation: Zoology Department, Faculty of Science, Cairo University, Giza, Egypt. fathyghaffar@yahoo.com
authors.forename: F
authors.initials: F
authors.lastname: Abdel-Ghaffar
authors.forename: M A
authors.initials: MA
authors.lastname: Ali
authors.forename: S
authors.initials: S
authors.lastname: Al Quraishy
authors.forename: R
authors.initials: R
authors.lastname: Entzeroth
authors.forename: A S
authors.initials: AS
authors.lastname: Abdel-Baki
authors.forename: S
authors.initials: S
authors.lastname: Al Farraj
authors.forename: A-R
authors.initials: AR
authors.lastname: Bashtar
mesh_terms: D000818:Animals; D004534:Egypt; D056890:Eukaryota / Q000145:classification* / Q000254:growth & development / Q000302:isolation & purification / Q000648:ultrastructure*; D005393:Fish Diseases / Q000469:parasitology*; D005704:Gallbladder / Q000469:parasitology; D019156:Indian Ocean; D008853:Microscopy; D046529:Microscopy, Electron, Transmission; D010473:Perciformes / Q000469:parasitology*; D011529:Protozoan Infections, Animal / Q000469:parasitology*; D013045:Species Specificity; D033761:Spores, Protozoan / Q000648:ultrastructure