{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T19:31:14Z","timestamp":1778527874583,"version":"3.51.4"},"reference-count":55,"publisher":"Inter-Research Science Center","license":[{"start":{"date-parts":[[2020,11,19]],"date-time":"2020-11-19T00:00:00Z","timestamp":1605744000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.int-res.com\/journals\/terms-of-use\/"}],"content-domain":{"domain":["int-res.com"],"crossmark-restriction":false},"short-container-title":["Dis. Aquat. Org."],"published-print":{"date-parts":[[2020,11,19]]},"abstract":"<jats:p>The present study describes a new species of myxosporean,<jats:italic>Ellipsomyxa ariusi<\/jats:italic>sp. nov., infecting the gallbladder of the threadfin sea catfish<jats:italic>Arius arius<\/jats:italic>(Hamilton, 1822).<jats:italic>E. ariusi<\/jats:italic>sp. nov. is characterized by bivalvular, ellipsoid or elongate-oval myxospores with smooth spore valves and a straight suture, arranged at an angle to the longitudinal spore axis. Mature myxospores measured 10.1 \u00b1 0.8 \u00b5m in length, 6.8 \u00b1 0.5 \u00b5m in width and 7.7 \u00b1 0.7 \u00b5m in thickness. Polar capsules are equal in size and oval to pyriform in shape. They are positioned at an angle to the longitudinal myxospore axis and open in opposite directions. Polar capsules measured 2.8 \u00b1 0.3 \u00b5m in length and 2.5 \u00b1 0.4 \u00b5m in width; polar filaments formed 4-5 coils, and extended to 32.2 \u00b1 2.1 \u00b5m in length. Monosporic and disporic plasmodial stages attached to the wall of gallbladder. Molecular analysis of the type specimen generated a 1703 bp partial SSU rDNA sequence (MN892546), which was identical to the isolates from 3 other locations. In phylogenetic analyses, genus<jats:italic>Ellipsomyxa<\/jats:italic>appeared monophyletic and<jats:italic>E. ariusi<\/jats:italic>sp. nov. occupied an independent position in maximum likelihood and Bayesian inference trees with high bootstrap values. The overall prevalence of infection was 54.8% and multiway ANOVA revealed that it varied significantly with location, year, season, sex and size of the fish host. Histopathological changes associated with<jats:italic>E. ariusi<\/jats:italic>sp. nov. infection included swelling, vacuolation and detachment of epithelial layer, reduced mucus production and altered consistency and colour of bile. Based on the morphologic, morphometric and molecular differences with known species of<jats:italic>Ellipsomyxa<\/jats:italic>, and considering differences in host and geographic locations, the present species is treated as new and the name<jats:italic>Ellipsomyxa ariusi<\/jats:italic>sp. nov. is proposed.<\/jats:p>","DOI":"10.3354\/dao03529","type":"journal-article","created":{"date-parts":[[2020,9,3]],"date-time":"2020-09-03T09:17:27Z","timestamp":1599124647000},"page":"83-97","update-policy":"https:\/\/doi.org\/10.3354\/policy","source":"Crossref","is-referenced-by-count":10,"title":["Ellipsomyxa ariusi sp. nov. (Myxosporea: Ceratomyxidae), a new myxosporean infecting the gallbladder of threadfin sea catfish Arius arius in India"],"prefix":"10.3354","volume":"142","author":[{"given":"A","family":"Chandran","sequence":"first","affiliation":[{"name":"Central Marine Fisheries Research Institute, PO Box 1603, Ernakulam North PO, Kerala 682018, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"PU","family":"Zacharia","sequence":"additional","affiliation":[{"name":"Central Marine Fisheries Research Institute, PO Box 1603, Ernakulam North PO, Kerala 682018, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"TV","family":"Sathianandan","sequence":"additional","affiliation":[{"name":"Central Marine Fisheries Research Institute, PO Box 1603, Ernakulam North PO, Kerala 682018, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"NK","family":"Sanil","sequence":"additional","affiliation":[{"name":"Central Marine Fisheries Research Institute, PO Box 1603, Ernakulam North PO, Kerala 682018, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1913","reference":[{"key":"Ref1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijpara.2013.05.003"},{"key":"Ref2","doi-asserted-by":"crossref","unstructured":"\u00c1lvarez-Pellitero P, Sitj\u00e0-Bobadilla A (1993) Ceratomyxa spp. (Protozoa: Myxosporea) infections in wild and cultured sea bass, Dicentrarchus labrax, from the Spanish Mediterranean area. 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