Morphology and phylogeny of Henneguya jocu n. sp. (Myxosporea, Myxobolidae), infecting the gills of the marine fish Lutjanus jocu

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• 作者：Carlos Azevedo^a ; ^b ; ^c ; ^{azevedoc@icbas.up.pt" class="auth_mail} ; ^{azevedoc1934@gmail.com" class="auth_mail} ; Só ; nia Rocha^a ; ^b ; Patrí ; cia Matos^d ; Edilson Matos^e ; Elsa Oliveira^a ; Saleh Al-Quraishy^c ; Graç ; a Casal^b ; ^f
• 关键词：Brazil ; Henneguya ; Myxozoa ; New species ; Phylogeny ; Ultrastructure
• 刊名：European Journal of Protistology
• 出版年：April, 2014
• 年：2014
• 卷：50
• 期：2
• 页码：185-193
• 全文大小：2218 K

文摘

Henneguya jocu n. sp. (Myxosporea, Myxobolidae) is described from the gill lamellae of the marine teleost fish Lutjanus jocu, with a focus on ultrastructural and molecular features. This myxosporean forms subspherical cysts up to 鈭?60 渭m 脳 130 渭m long, and develops asynchronously. Mature myxospores ellipsoidal with a bifurcated caudal process. Myxospore length 10.9 卤 0.4 渭m (n = 50); width, 8.2 卤 0.3 渭m (n = 50); and thickness, 2.9 卤 0.5 渭m (n = 50). Two equal caudal processes, 34.1 卤 1.0 渭m long (n = 50); and total myxospore length, 45.2 卤 1.0 渭m (n = 50). Two symmetric valves surround two ellipsoidal polar capsules, 5.0 卤 0.3 脳 1.4 卤 0.2 渭m (n = 20), each containing an isofilar polar filament forming 4-5 coils along the inner wall of these structures, as well as a binucleated sporoplasm presenting a spherical vacuole and several globular sporoplasmosomes. Both the morphological data and molecular analysis of the SSU rDNA gene identify this parasite as a new species of the genus Henneguya. Maximum Likelihood and Maximum Parsimony analyses further indicate that the parasite clusters within others marine Myxobolidae species, forming a group alongside other Henneguya species described from marine hosts.