Etude morpho-anatomique et génétique de deux nouveaux Proteocephalus Weinland, 1858 (Cestoda: Proteocephalidae) parasites de Platydoras costatus (L.), poisson siluriforme du Paraguay

Chambrier, Alain de; Vaucher, Claude

doi:10.1007/bf00008479

Cited by 25 publications

(9 citation statements)

References 19 publications

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“…The structure of the pars copulatrix vaginae is constant in our material. As mentioned elsewhere (de Chambrier & Vaucher, 1994), this may be a good specific discriminant character.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, several species have been described or redescribed which exhibit characters intermediate to those used by Woodland to define the subfamilies, e.g. Jauella glandicephalus Rego & Pavanelli, 1985, Nupelia portoriquensis Pavanelli & Rego, 1991, Proteocephalus paraguayensis (Rudin, 1917) (see de Chambrier, 1990), P. catzeflisi de Chambrier et al, 1992, P. renaudi de Chambrier & Vaucher, 1994, and other species (Rego & Pavanelli, 1985;Pavanelli & Rego, 1991;de Chambrier, 1990;de Chambrier et al, 1992;de Chambrier & Vaucher, 1994). The classification established by Woodland is becoming inadequate to incorporate the newly described specimens from Brazilian freshwater fishes at the subfamily level.…”

Section: Discussionmentioning

confidence: 99%

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Mariauxiella pimelodi n. g., n. sp. (Cestoda: Monticelliidae): a parasite of pimelodid siluroid fishes from South America

Chambrier

Rêgo

1995

Syst Parasitol

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Mariauxiella pimelodi n. g., n. sp. (Cestoda, Monticelliidae, Othinoscolecinae) is described from the South American siluriform fishes Pimelodus ornatus and Pimelodus sp. caught in Brazil and Paraguay. When compared with other genera of South American monticelliids, the new genus exhibits the following morpho-anatomical characters: the particular development of the distal circular musculature of the suckers acting as a sphincter; the medullar ovary projecting numerous lobules into the dorsal cortex; and the uterus situated in the ventral cortex but with numerous outgrowths penetrating the medulla and reaching the dorsal cortex in pregravid proglottids. The new species is the fourth monticelliid cestode recorded from Pimelodus. ResumoMariauxiella pimelodi n. g., n. sp. (Cestoda, Monticelliidae, Othinoscolecinae) 6 descrita do peixe siluriforme Pimelodus ornatus e Pimelodus sp, colectados no rio Cuiabzi em Mato Grosso e no rio Parami, Paran~, Brasil e no rio Pirapo, em Caazapa, Paraguay. Este genero se diferencia dos outros g~neros descritos de Monticelideos pelos seguintes caracteres, mais importantes: a musculatura especial das ventosas, lembrando esfincter, mas de morfologia diferente; o ovario medular, mas projetando foliculos no cortex dorsal; o utero, localizado no cortex ventral, mas seus diverticulos projetam pequenas h6rnias, que atravessam a medula e atingem o cortex dorsal. Esta 6 aquarta especie descrita de hospedeiro do genero Pimelodus.

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“…The structure of the pars copulatrix vaginae is constant in our material. As mentioned elsewhere (de Chambrier & Vaucher, 1994), this may be a good specific discriminant character.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Mariauxiella pimelodi n. g., n. sp. (Cestoda: Monticelliidae): a parasite of pimelodid siluroid fishes from South America

Chambrier

Rêgo

1995

Syst Parasitol

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“…Position of testicular fields: 9. two distinctly separated fields, Proteocephalus soniae de Chambrier & Vaucher, 1994(after de Chambrier & Vaucher, 1994; 10. two fields connected anteriorly, P. regoi (after Chambrier & al., 1996; 11. one field, Mariauxiella pimelodi de Chambrier & Rego, 1995(after de Chambrier & Rego, 1995. Scale-bars: 9, 10, 500 µm; 11, 250 µm.…”

Section: Character Analysismentioning

confidence: 99%

Preliminary phylogenetic analysis of subfamilies of the Proteocephalidea (Eucestoda)

et al. 1998

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“…The most common type is a ring-shaped concentration of muscle fibres The pars copulatrix vaginae can be further characterised by the presence of a huge concentration of muscle and chromophilic cells that do not form a true vaginal sphincter, i.e., do not include elongated or ring-shaped bundles of muscle fibres, as observed in Pseudoendorchis spp. or Proteocephalus soniae de Chambrier & Vaucher, 1994(fig. 10 in de Chambrier & Vaucher, 1994.…”

Section: Discussionmentioning

confidence: 99%

Description of the first species of Pseudoendorchis (Cestoda: Proteocephalidae) with uniloculate suckers from the pimelodid catfish Megalonema platycephalum, with comments on the taxonomic importance of the terminal vagina

2021

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The proteocephalid genus Pseudoendorchis (Cestoda: Onchoproteocephalidea) has recently been proposed to accommodate seven species/species-level lineages of tapeworm parasites of catfishes (Siluriformes) in the Neotropical region, based on integration of genetic information, and morphological and ecological data. Its members are typified by having a large Mehlis' gland, representing more than 1/5 (usually 1/4-1/2) of proglottid width, and the vagina always anterior to the cirrus-sac. Critical examination of previously unstudied museum cestodes tentatively designated as Pseudoendorchis sp. 3 from Megalonema platycephalum (Pimelodidae) in the Peruvian Amazon made it possible to formally describe this taxon and to differentiate it from all congeneric species. The new species, which is the first parasite of M. platycephalum ever recorded, is characterised mainly by having the scolex bearing four uniloculate suckers (biloculate in all nominal species of the genus), the lowest relative surface of the ovary (ratio of its surface to that of the whole proglottid) among species of the genus (\ 9% versus [11%, usually 15-20%), and an extraordinarily large Mehlis' gland (its diameter represents 41-50% of proglottid width). Morphology of the terminal portion of the vaginal canals in proteocephalids is briefly discussed.

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Etude morpho-anatomique et génétique de deux nouveaux Proteocephalus Weinland, 1858 (Cestoda: Proteocephalidae) parasites de Platydoras costatus (L.), poisson siluriforme du Paraguay

Cited by 25 publications

References 19 publications

Mariauxiella pimelodi n. g., n. sp. (Cestoda: Monticelliidae): a parasite of pimelodid siluroid fishes from South America

Mariauxiella pimelodi n. g., n. sp. (Cestoda: Monticelliidae): a parasite of pimelodid siluroid fishes from South America

Preliminary phylogenetic analysis of subfamilies of the Proteocephalidea (Eucestoda)

Description of the first species of Pseudoendorchis (Cestoda: Proteocephalidae) with uniloculate suckers from the pimelodid catfish Megalonema platycephalum, with comments on the taxonomic importance of the terminal vagina

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