Morphological and molecular analysis of Henneguya tietensis n. sp. (Cnidaria: Myxosporea), parasitizing the gill filaments of Prochilodus lineatus (Valenciennes, 1837) from Brazil

Vieira, Diego Henrique Mirandola Dias; Rangel, Luís F.; Tagliavini, Vinícius Panciera; Abdallah, Vanessa Doro; Santos, María J.; Azevedo, Rodney Kozlowiski de

doi:10.1007/s00436-020-06918-7

Cited by 6 publications

(3 citation statements)

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“…Sequencing of H. correai n. sp. ssrDNA yielded 1763 bp, and the BLASTn search of the NCBI database showed the closest sequence was Henneguya tietensis Vieira, Rangel, Tagliavini, Abdallah, Santos and Azevedo, 2020 (MN653131) with 88.2% similarity [12]. ML and BI phylogenetic analysis based on 46 taxa over 950 bp revealed similar topologies of South American myxobolids, recovering two primary clades well supported by posterior probability (PP) and bootstrap (B) (Figure 4).…”

Section: Resultsmentioning

confidence: 92%

“…Myxospore morphology, fish host family and tissue tropism often correlate strongly with ssrDNA phylogenetic patterns in Myxozoa [12,[39][40][41][42]. The Myxobolidae, however, have many exceptions to these correlations, particularly in the case of myxospore morphology, where molecular data generally do not support the morphological distinctions of the genera Myxobolus and Henneguya based on the presence of caudal processes [40][41][42][43][44], or distinction of Myxobolus and Thelohanellus on the basis of polar capsule number [45].…”

Section: Discussionmentioning

confidence: 97%

“…They infect freshwater and marine fishes, and some species can cause important diseases in their host fish [6][7][8][9]. In neotropical, freshwater habitats of South America, species of Myxobolidae are the most commonly encountered and described myxozoans [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Henneguya correai n. sp. (Cnidaria, Myxozoa) Parasitizing the Fins of the Amazonian Fish Semaprochilodus insignis

et al. 2023

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We used a combination of morphological, molecular and biological data to characterize a novel Henneguya (Myxozoa) species infecting the Amazonian prochilodontid Semaprochilodus insignis or “kissing prochilodus”, a popular food fish and aquarium species in the Brazilian Amazon. Twenty-one S. insignis were caught live from the Tapajós river, Pará State, Brazil, then examined for myxozoan infections. Cysts of a novel Henneguya species were observed in the connective tissue of the fins. Myxospores measured 48 ± 4.9 (39.5–60.8) µm total length, of which caudal appendages were 33 ± 4.5 (26.4–45.2) µm and spore body was 15 ± 1.6 (12.4–20.5) µm. The spore body was 4.0 ± 0.6 (2.7–5.3) µm wide × 3.2 ± 0.4 (2.7–3.6) µm thick, with two unequal polar capsules (nematocysts) 7.2 ±0.8 (5.2–8.3) × 1.5 ± 0.3 (1.0–2.2) µm for the larger capsule and 5 ± 0.7 (4.0–6.3) × 1.4 ± 0.2 (1.0–1.8) µm for the smaller capsule. Polar tubules had 8–13 turns. Generative cells, immature and mature myxospores were observed within plasmodia. Ultrastructure showed plasmodia surrounded by collagen fibers, with the plasmodial membrane having pinocytotic channels. Phylogenetic analysis of small subunit ribosomal DNA sequences showed that the new Henneguya species clustered as a sister taxon to Henneguya tietensis, a parasite of the gills of the prochilodontid fish Prochilodus lineatus, from the geographically distant Paraná–Paraguai River basin.

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Section: Resultsmentioning

confidence: 92%