Microscopic and molecular procedures are used to describe a new myxosporean species, Henneguya carolina sp. nov., found infecting the intestine of marine teleost fish Trachinotus carolinus on southern Atlantic coast Brazil. Spherical ellipsoid cysts, measuring up ~750 µm, display synchronous development. Mature myxospores ellipsoidal with bifurcated caudal process. Myxospore body length, width, thickness 12.7 ± 0.8 (12.0-13.4) 8.8 0.6 (7.5-9.6) 5.8 0.4 (5.0-6.4) respectively; 2 equal...

Abstract Ortholinea labracis n. sp. is described and its life cycle inferred from a Southern Portuguese fish farm, with basis on microscopic molecular procedures. This myxosporean parasite infects the urinary bladder of European seabass Dicentrarchus labrax intestinal epithelium marine oligochaete genus Tectidrilus . Myxospores subspherical in valvular view ellipsoidal sutural measuring 7.6 ± 0.3 (6.8–8.7) μm length, 7.2 0.2 (6.7–7.7) width 6.5 0.4 (5.8–7.7) thickness. Two polar capsules,...

Thelohanellus marginatus n. sp., a new myxosporean parasite infecting the primary gill filaments of teleost fish Hypophthalmus (Pimelodidae) in Amazon River, is described on basis microscopic and molecular procedures. The forms whitish ellipsoidal cysts up to 250 μm diam. Myxospores with slightly more pointed anterior end, measuring 17.1 ± 0.6 length, 6.9 0.4 width, 5.1 0.5 thickness. A single pyriform polar capsule, 9.0 0.3 long 6.1 wide, positioned right medial plane valvular view,...

A new ceratomyxid parasite was examined for taxonomic identification, upon being found infecting the gall bladder of Hemiodus microlepis (Teleostei: Hemiodontidae), a freshwater teleost collected from Amazon River, Brazil. Light and transmission electron microscopy revealed elongated crescent-shaped spores constituted by two asymmetrical shell valves united along straight sutural line, each possessing lateral projection. The body measured 5.2 ± 0.4 µm (n = 25) in length 35.5 0.9 total...

A new myxosporean, Zschokkella auratis sp. nov., infecting the gall bladder of gilthead seabream Sparus aurata in a southern Portuguese fish farm, is described using microscopic and molecular procedures. Plasmodia mature spores were observed floating free bile. Plasmodia, containing immature spores, characterized by formation branched glycostyles, apparently due to release segregated material contained within numerous cytoplasmic vesicles. Mature ellipsoidal sutural view slightly...

Mullets inhabit a wide range of habitats from tropical to temperate regions and play critical role in their ecosystems. This commercially important fish group constitutes significant source food several geographic regions, the production some species for consumption is an increasing trend. About 64 myxosporean have been reported mullets, which are cryptic, as case Myxobolus exiguus, M. muelleri. paper provides, first time, detailed revision data available myxobolids determining that bona...

A new myxosporean species is described from the muscle of Amazonian freshwater fish Chaetobranchopsis orbicularis (Teleostei, Cichlidae), with basis on morphometric, ultrastructural and molecular data. Numerous myxospores were observed within pseudocysts located hosts' dorsal ventral muscles, near neural spines canal (spinal cord). Mature quadrangular rounded ends in apical view, measuring 4.3 (3.6-5.0) μm length 5.1 (4.2-5.8) width. The wall formed by four symmetric valves. Within, pyriform...

SUMMARY Known life cycles of myxosporean parasites have two hosts, but very few been disclosed, especially in the marine environment. Sphaerospora dicentrarchi Sitjà-Bobadilla and Álvarez-Pellitero, 1992 is a systemic parasite from European seabass, Dicentrarchus labrax (Linnaeus, 1758), highly valuable commercial fish. It affects its health, leading to aquaculture production losses. During 2013 2014, an actinospore survey was conducted total 5942 annelids collected fish farm Algarve Aveiro...

A new microsporidian species of the genus Glugea Thélohan, 1891 parasitising marine teleost fish Cephalopholis hemistiktos Rüppell, collected from Red Sea in Saudi Arabia, is described on basis microscopic and molecular procedures. Spherical whitish xenoma were observed adhering to intestinal wall. The numerous spores contained within these xenoma, ovoid pyriform measured 4.3-6.0 µm (5.1 µm) length 1.8-2.9 (2.2 width. spore's wall was composed two thick layers, which thinner area contacting...

Chloromyxum leydigi Mingazzini, 1890, the type species of is redescribed based on material found in gall bladder cartilaginous fish Torpedo marmorata Risso collected from Portuguese Atlantic coast and its sporogonic development described. Plasmodia mature spores were floating free bile. are polysporic highly polymorphic shape organization. Mature spherical to subspherical with a pointed anterior end, measuring 12.3 +/- 0.5 microm length 9.0 width. The spore wall composed two asymmetric shell...

The myxosporean parasite Ceratomyxa diplodae Lubat et al. 1989 sensu Sitjà-Bobadilla & Álvarez-Pellitero, 1993, originally described from the annular seabream Diplodus annularis in Adriatic Sea, has subsequently been reported several other sparid hosts, and also a moronid fish, European seabass Dicentrarchus labrax Mediterranean Sea. Here, molecular identity additional morphological data are given for this infecting gall bladder of D. southern Portuguese fish farm. In bile, disporic...

Myxosporeans are widespread cnidarian parasites that usually parasitize fish as part of their complex life cycle, thus constituting a potential threat for the aquaculture industry. White seabream Diplodus sargus (L.) is commercially valuable sparid reared in Southern European aquacultures. Nonetheless, knowledge on myxosporean infections potentially harming sustainable production this extremely limited. In study, survey was conducted D. specimens two Portuguese farms. Two coelozoic...

A fish-infecting myxosporean was found in the urinary bladder of teleostean Colomesus psittacus, collected from Amazon River, Brazil. Specimens were sampled three different periods: May and June, with water temperature ranging 18-23oC; August, 24-28oC; November December, 29-32oC. Upon observation, several fish displayed abnormal behaviour, consisting erratic movements, mortality recorded among them. Necropsy all fishes revealed hypertrophy only specimens previously displaying irregular...

Microscopic and molecular procedures are used to describe a new myxosporean species, Chloromyxum clavatum n. sp., infecting the cartilaginous fish Raja clavata Linnaeus, 1758 (Chondrichthyes: Rajidae), collected from northwest Atlantic coast of Portugal. Young plasmodia mature spores were found floating free in gall bladder R. clavata. Spores spherical subspherical with pointed anterior end, measuring14.4 ± 0.5 μm (n = 25) length, 11.9 width, 9.4 15) thickness. The spore's wall was composed...