Ceratomyxa hungarica n. sp. and Chloromyxum proterorhini n. sp. (Myxozoa: Myxosporea) from the freshwater goby Proterorhinus marmoratus (Pallas)

Abstract

When studying the parasite fauna of freshwater gobies Proterorhinus marmoratus collected from the reaches of the River Danube around Budapest, two species of Myxosporea were recovered, a renal and a gall-bladder form. Previously no myxosporeans had been reported from this fish species. The spores and pseudoplasmodia of the parasite described as Ceratomyxa hungarica n. sp. were found in the convoluted tubules of the kidney and in the cavity of Bowman's capsule. The pseudoplasmodia were loosely attached to the wall of the tubules, causing their distention. Within each pseudoplasmodium two spores were formed. In the case of Chloromyxum proterorhini n. sp. only spores floating freely in the contents of the gall-bladder were found. Since Ceratomyxa species are typically marine fish parasites, Proterorhinus marmoratus, a fish species which has adapted to freshwater, appears to have retained some of its marine myxosporean fauna.

Ceratomyxa sparusaurati N. Sp. (Myxosporea: Bivalvulida), a New Parasite from Cultured Gilthead Seabream (Sparus aurata L.) (Teleostei: Sparidae): Light and Electron Microscopic Description

“…Concerning sporogenesis of C. sparusaurati. disporous development, observed both at LM and TEM has also been reported in C. hungarica [19], icyte cell, a common membrane should be seen encircling them, and this does not seem to be the case in C. sparusaurati; instead, two different membranes surrounded each maturing spore inside the P cell, as in Sphaerospora testicularis [28] and Zschokella rnugilis [29]. The absence of an ectoplasm in P cells [ 131 and the observation of groups of five cells (possibly the not yet differentiated sporogonic cells) surrounded by a common mem-brane could also refute the perycitic nature.…”

Ultrastructural and phylogenetic data of Chloromyxum riorajum sp. nov. (Myxozoa), a parasite of the stingray Rioraja agassizii in Southern Brazil

“…ellipsoidal spores with 2 shell valves, 4 equal-sized polar capsules and a bundle of caudal filamentous projections, shows the characters of a parasite belonging to the genus Chloromyxum (Lom & Noble 1984, Lom & Dyková 2006. A comparison of our results with the morphology and ultrastructural organization of previously described species of this genus, shows that the morphology is similar, which consequently confirms that this parasite belongs to this genus (Lom & Noble 1984, Lom et al 1988, Baska 1990, 1993, Molnár 1992, Shul'man & Ieshko 2003, Hallett et al 2006, Lom & Dyková 1992, 2006, although few of the previously described species have attached caudal filaments. Amongst the 115 recognized species of this genus, only Chloromyxum leydigi Mingazzini, 1890 (Pinto 1928, Gioia & Cordeiro 1996, C. ovatum and C. transversocostatum (Kuznetsova 1977) have attached filaments (Lom & Dyková 2006).…”

Light and electron microscopical description of Ceratomyxa labracis n. sp. and a redescription of C. diplodae (Myxosporea: Bivalvulida) from wild and cultured Mediterranean sea bass Dicentrarchus labrax (L.) (Teleostei: Serranidae)

“…Subsequent to the major revisions of Meglitsch (1960) and Shulman (1966), which included 108 named species, at least 20 species have been described (Moser, 1976;Moser & Noble, 1976;Dubina & Isakov, 1976;Evdokimova, 1977;Gaevskaya & Kovaleva, 1980;Kovaleva & Gaevskaya, 1983;Gaevskaya & Kovaleva, 1984;Wierzbicka, 1987;Kovaleva & Gaevskaya, 1988;Lubat et al, 1989;Moser et al, 1989;Moln~ir, 1992). The high number of members of this genus, the dubious separation of some species from Leptotheca Th61ohan, 1895 and the poor quality of many descriptions, make the task of taxonomic comparison difficult.…”