Spasskyellina mandi n. sp. (Proteocephalidea: Monticelliidae), parasite of Pimelodus ornatus Kner, 1857 (Pisces: Pimelodidae) of the Paraná River, Paraná, Brazil

Pavanelli, Gilberto Cezar; Takemoto, Ricardo Massato

doi:10.1590/s0074-02761996000600013

Cited by 13 publications

(7 citation statements)

References 2 publications

(1 reference statement)

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“…1b. Additionally, Spasskyellina mandi Pavanelli & Takemoto, 1996 is confirmed in this revalidated genus because of its obviously similar morphology, contrary to previous observations (Pavanelli and Takemoto 1996, de Chambrier and Vaucher 1999). Since molecular data for other species of Monticellia are not available, they are provisionally kept in that genus.…”

Section: Discussionmentioning

confidence: 48%

A large 28S rDNA-based phylogeny confirms the limitations of established morphological characters for classification of proteocephalidean tapeworms (Platyhelminthes, Cestoda)

Chambrier¹,

Waeschenbach²,

Fisseha³

et al. 2015

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Proteocephalidean tapeworms form a diverse group of parasites currently known from 315 valid species. Most of the diversity of adult proteocephalideans can be found in freshwater fishes (predominantly catfishes), a large proportion infects reptiles, but only a few infect amphibians, and a single species has been found to parasitize possums. Although they have a cosmopolitan distribution, a large proportion of taxa are exclusively found in South America. We analyzed the largest proteocephalidean cestode molecular dataset to date comprising more than 100 species (30 new), including representatives from 54 genera (80%) and all subfamilies, thus significantly improving upon previous works to develop a molecular phylogeny for the group. The Old World origin of proteocephalideans is confirmed, with their more recent expansion in South America. The earliest diverging lineages are composed of Acanthotaeniinae and Gangesiinae but most of the presently recognized subfamilies (and genera) appear not to be monophyletic; a deep systematic reorganization of the order is thus needed and the present subfamilial system should be abandoned. The main characters on which the classical systematics of the group has been built, such as scolex morphology or relative position of genital organs in relation to the longitudinal musculature, are of limited value, as demonstrated by the very weak support for morphologically-defined subfamilies. However, new characters, such as the pattern of uterus development, relative ovary size, and egg structure have been identified, which may be useful in defining phylogenetically well-supported subgroups. A strongly supported lineage infecting various snakes from a wide geographical distribution was found. Although several improvements over previous works regarding phylogenetic resolution and taxon coverage were achieved in this study, the major polytomy in our tree, composed largely of siluriform parasites from the Neotropics, remained unresolved and possibly reflects a rapid radiation. The genus Spasskyellina Freze, 1965 is resurrected for three species of Monticellia bearing spinitriches on the margins of their suckers.

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Section: Discussionmentioning

confidence: 48%

A large 28S rDNA-based phylogeny confirms the limitations of established morphological characters for classification of proteocephalidean tapeworms (Platyhelminthes, Cestoda)

Chambrier¹,

Waeschenbach²,

Fisseha³

et al. 2015

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“…are also known to harbour a diverse fauna of proteocephalids, with six species of five genera originally described from these hosts, namely Mariauxiella pimelodi de Chambrier & Rego, 1995 in Pimelodus ornatus Kner, Monticellia magna (Rego, Santos & Silva, 1974) in Pimelodus maculatus Lacepède, Nomimoscolex alovarius Brooks & Deardorff, 1980 in Pimelodus blochii Valenciennes, Nomimoscolex microacetabula Gil de Pertierra, 1995 and Proteocephalus pimelodi (Gil de Pertierra, 1995), both in Pi. maculatus , and Spasskyellina mandi Pavanelli & Takemoto, 1996 in Pi. ornatus (see Alves, de Chambrier, Scholz, et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Integrative taxonomy reveals hidden cestode diversity in Pimelodus catfishes in the Neotropics

et al. 2020

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Proteocephalid tapeworms are the dominant group of endoparasites in siluriform catfishes in South America, but their interrelationships and actual diversity remain poorly understood. Molecular prospecting of proteocephalids found in pimelodid and other catfishes, especially in Pimelodus spp., along with thorough morphological evaluation, revealed high species diversity of these parasites. Using newly obtained sequences of the partial large subunit nuclear ribosomal RNA (lsrDNA) and complete mitochondrial cytochrome c oxidase subunit I (COI), phylogenetic relationships of the cestodes of Pimelodus catfishes were assessed and a new genus, Pseudoendorchis gen. n., proposed to accommodate P. auchenipteri comb. n. (type species; formerly Endorchis auchenipteri), P. cristata sp. n. from Pimelodella cristata (Heptapteridae), P. felipei sp. n. from Pimelodus fur, P. souzalimae sp. n. from Pimelodus maculatus and another three putative new species. Members of the new genus can be readily distinguished from all known Neotropical proteocephalids by having a large Mehlis’ gland, representing at least 18% of proglottid width, and the vagina always anterior to the cirrus‐sac. Moreover, all phylogenetic, species discovery and validation analyses support validity of Pseudoendorchis. Combining the lsrDNA + COI sequence data appeared to provide the best resolution in phylogenetic analyses, which may be useful to reduce the uncertainty of the interrelationships among Neotropical proteocephalids.

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“…Spination of the scolex has also been reported in other proteocephalideans of the subfamilies Gangesiinae, Acanthotaeniinae (Proteocephalidae), Monticelliinae (Spasskyellina), and Zygobothriinae (Nomimoscolex; e.g., see Woodland 1934;Nybelin 1942;Rees 1963;Freze 1965;Brooks 1978b;Rego 1994;Pavanelli and Takemoto 1996;Rego et al 1998). However, it was previously demonstrated by Thompson et al (1980) in the 10,500.…”

Section: Discussionmentioning

confidence: 72%

Scolex morphology of the cestode Silurotaenia siluri (Batsch, 1786) (Proteocephalidae: Gangesiinae), a parasite of European wels ( Silurus glanis )

Scholz

Zdárská

Chambrier

et al. 1999

Parasitology Research

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The morphology of the scolex of the tapeworm Silurotaenica siluri (Batsch, 1786) (Proteocephalidae: Gangesiinae), a specific parasite of European wels (Silurus glanis L.), was studied using light, scanning (SEM), and transmission electron (TEM) microscopy. The scolex of S. siluri is rather uniform in shape and size; it is globular, and has four prominent, anteriorly directed suckers and a spherical, muscular apical organ corresponding to the rostellum of cyclophyllidean cestodes. The rostellum-like apical organ is armed with five to six irregular rows of small hooklets with a wide, oval basal plate and a short, posteriorly curved blade. The excretory system of the scolex is formed by sinuous secondary canals ending blindly beneath the distal layer of the tegument, not opening outside. The surface of the scolex is covered with filiform microtriches; giant spine-like and blade-like microtriches, incorrectly interpreted as spines or hooklets in previous descriptions of S. siluri, are present on the neck region and posterior margins and internal cavities of the suckers. It is assumed that tegumental spines reported in the scolices of other proteocephalideans (subfamilies Acanthotaeniinae and Gangesiinae, genera Spasskyellina and Nomimoscolex) could indeed be spiniform microtriches.

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Spasskyellina mandi n. sp. (Proteocephalidea: Monticelliidae), parasite of Pimelodus ornatus Kner, 1857 (Pisces: Pimelodidae) of the Paraná River, Paraná, Brazil

Cited by 13 publications

References 2 publications

A large 28S rDNA-based phylogeny confirms the limitations of established morphological characters for classification of proteocephalidean tapeworms (Platyhelminthes, Cestoda)

A large 28S rDNA-based phylogeny confirms the limitations of established morphological characters for classification of proteocephalidean tapeworms (Platyhelminthes, Cestoda)

Integrative taxonomy reveals hidden cestode diversity in Pimelodus catfishes in the Neotropics

Scolex morphology of the cestode Silurotaenia siluri (Batsch, 1786) (Proteocephalidae: Gangesiinae), a parasite of European wels ( Silurus glanis )

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