Myxobolus saladensis sp. nov., a new species of gill parasite of Mugil liza (Osteichthyes, Mugilidae) from Samborombón Bay, Buenos Aires, Argentina

Marcotegui, Paula Soledad; Martorelli, Sergio Roberto

doi:10.1590/1678-4766e2017026

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…Dar et al (2017) reported inactivation of infected gill lamellae due to intra-lamellar vascular (LV3) type infection causing necrosis, hypertrophy and hyperplasia of the calciform cells. Marcotegui & Martorelli (2017) observed that cysts of M. saladensis infecting the gill epithelium of M. liza may interfere with the respiratory function of the host.…”

Section: Discussionmentioning

confidence: 99%

“…Yurakhno & Ovcharenko (2014) have reported 36 species of myxosporeans representing eight genera infecting Mugil cephalus, of which 21 belonged to the genus Myxobolus. World over, 51 species of Myxobolus have been reported from mullets, of which, 22 were found infecting the gills (Yurakhno & Ovcharenko 2014;Marcotegui & Martorelli 2017;Cardim et al 2018;Rocha et al 2019). Eleven species of Myxobolus, M. narasii (Narasimhamurti 1970), M. lizae, M. macrolepi and M. sphaeralis (Narasimhamurti & Kalavati 1979), M. mugcephalus (Narasimhamurti et al 1980), M. anili (Sarkar 1989), M. bankimi (Sarkar 1999), M. mugilii (Haldar et al 1996) and M. goensis (Eiras & D'souza 2004) have been reported infecting mullets from India.…”

Section: Introductionmentioning

confidence: 99%

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Morphological and molecular description of a new species of Myxobolus (Myxosporea: Myxobolidae) infecting Planiliza macrolepis (Smith, 1846) from India

2021

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The present paper describes a novel species of Myxobolus parasitizing the gill laments of the largescale mullet, Planiliza macrolepis from Cochin backwaters, Kerala, India. The parasite develops in the gill laments; plasmodia elongated, milky white, measured 1.37 -2.18 (1.78 ± 0.35) mm x 0.07-0.12 (0.10 ± 0.02) mm in size. Mature myxospores ovoid in valvular view, biconvex in sutural view with smooth shell valves and measured 6.24 -7.02 (6.63 ± 0.23) × 5.01 -6.18 (5.68 ± 0.25) μm in size. Polar capsules equal, oval with pointed anterior ends, 3.07 -3.58 (3.33 ± 0.12) × 1.68 -2.42 (2.09 ± 0.18) μm in size. Polar laments with 4 coils, measured 29.61 ± 4.75 μm in length when extruded. Sporoplasm binucleate with a rudimentary nucleus and a vacuole. A comparison with related Myxobolus species revealed signi cant morphological & morphometric differences. In BLASTN and genetic distance analysis, the present parasite showed high divergence with other myxosporean sequences, indicating its molecular uniqueness. In Maximum Likelihood and Bayesian Interference analysis, the present species stands out with M. ramadus as sister branch within the Myxobolus clade. In infected gill laments, the plasmodia caused swelling/deformation, compression of lamellae and reduction in respiratory surface area. Three of 222 P. macrolepis screened were infected, indicating a prevalence of 1.3%. Considering the morphological, morphometric, molecular and phylogenetic differences with the previously described species of myxosporeans, along with the dissimilarities in host and geographical locations, the present parasite is treated as a new species and the name Myxobolus cochinensis n. sp. is proposed.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphological and molecular description of a new species of Myxobolus (Myxosporea: Myxobolidae) infecting Planiliza macrolepis (Smith, 1846) from India

2021

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“…To date, 51 species of Myxobolus have been reported from mugiliform hosts worldwide (see Marcotegui and Martorelli, 2017; Cardim et al ., 2018; Rocha et al ., 2019 d , 2019 e ). Of these, 20 are known to occur in the Iberian Peninsula, parasitizing mullets that were either captured from the estuary of the River Minho in northern Portugal (Rocha et al ., 2019 d , 2019 e ), or from the Spanish Mediterranean coast (Yurakhno and Ovcharenko, 2014; Sharon et al ., 2019).…”

Section: Discussionmentioning

confidence: 99%

Involvement of sphaeractinomyxon in the life cycle of mugiliform-infecting Myxobolus (Cnidaria, Myxosporea) reveals high functionality of actinospore morphotype in promoting transmission

et al. 2020

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Four new actinospore types belonging to the sphaeractinomyxon collective group (Cnidaria, Myxosporea) are described from the coelomic cavity of a marine Baltidrilus sp. (Oligochaeta, Naididae) inhabiting a northern Portuguese estuary. Host identification supports the usage of marine oligochaetes, namely of the family Naididae Ehrenberg, 1828, as definitive hosts for myxosporeans inhabiting estuarine/marine environments. The absence of mixed infections in the host specimens analysed is suggested to reflect the influence of host-, parasite- and environmental-related factors regulating myxosporean–annelid interactions. Molecular analyses matched the SSU rDNA sequences of three of the four new types with those of mugiliform-infecting Myxobolus spp., namely Myxobolus mugiliensis and a Myxobolus sp. from flathead grey mullet Mugil cephalus, and Myxobolus labrosus from thicklip grey mullet Chelon labrosus. These results directly link, for the first time, the sphaeractinomyxon collective group to a myxospore counterpart, further confirming their previously hypothesized specific involvement in the life cycle of myxobolids that infect mullets. Acknowledging this life cycle relationship, the functionality of the sphaeractinomyxon morphotype is suggested to have been decisive for the evolutionary hyperdiversification of the genus Myxobolus in mullets. Unlike other actinospore morphotypes, sphaeractinomyxon lack valvular processes, which implies a limited capability for buoyancy. Considering the benthic-feeding nature of mullets, this feature is most likely crucial in promoting successful transmission to the vertebrate host.

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Morphological, histological, and molecular description of Myxobolus ompok n. sp. (Myxosporea: Myxobolidae), a kidney myxozoan from Pabdah catfish Ompok pabda (Hamilton, 1822) (Siluriformes: Siluridae) in India

Chaudhary

Goswami

Gupta³

et al. 2018

Parasitol Res

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In a parasitological survey of freshwater fishes near Meerut, Uttar Pradesh, India, myxozoan infections in Pabdah catfish Ompok pabda Ham. (Siluriformes: Siluridae) were found. Round plasmodia and scattered spores of Myxobolus ompok n. sp. were found in the kidney of the host. Plasmodia measuring 150-200 μm were located in the renal interstitium. Spores of Myxobolus ompok n. sp. were elongated pyriform, 13.6-14.4 (14.8 ± 0.42) μm long, 5.6-6.4 (6.5 ± 0.33) μm wide, and 5.2-6.4 (5.9 ± 0.43) μm thick with two equal polar capsules measuring 8.0-8.5 (8.2 ± 0.2) μm in length and 1.5-2.4 (1.8 ± 0.33) in width having six filamental turns. Both the morphology and DNA analysis of the 18S rRNA gene revealed that Myxobolus ompok n. sp. is distinct from previously described species of Myxobolus and shares no significant similarity with any other Myxobolus deposited in the GenBank database. Phylogenetic analysis inferred that this species showed the closest similarity to Myxobolus miyarii (KT001495). This is the first record of any Myxobolus sp. from O. pabda in India.

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Myxobolus saladensis sp. nov., a new species of gill parasite of Mugil liza (Osteichthyes, Mugilidae) from Samborombón Bay, Buenos Aires, Argentina

Cited by 6 publications

References 21 publications

Morphological and molecular description of a new species of Myxobolus (Myxosporea: Myxobolidae) infecting Planiliza macrolepis (Smith, 1846) from India

Morphological and molecular description of a new species of Myxobolus (Myxosporea: Myxobolidae) infecting Planiliza macrolepis (Smith, 1846) from India

Involvement of sphaeractinomyxon in the life cycle of mugiliform-infecting Myxobolus (Cnidaria, Myxosporea) reveals high functionality of actinospore morphotype in promoting transmission

Morphological, histological, and molecular description of Myxobolus ompok n. sp. (Myxosporea: Myxobolidae), a kidney myxozoan from Pabdah catfish Ompok pabda (Hamilton, 1822) (Siluriformes: Siluridae) in India

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