Morphological study of members of the genus Echeneibothrium (Cestoda: Rhinebothriidea: Echeneibothriidae) from rajiform skates of the Argentine Sea and analysis of the phylogenetic relationships within the family Echeneibothriidae

Franzese, Sebastián; Mutti, Leonardo Damián; Tropea, Carolina; Ivanov, Verónica A.

doi:10.1016/j.jcz.2022.05.002

Cited by 7 publications

(11 citation statements)

References 60 publications

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“…Cup‐shaped structures without cilia were observed on the nonadherent surface of the scolex (Figure 2c). These structures are similar to the sensory receptors present in the apical region of the scolex of Echeneibothrium cristinae (Rhinebothriidea) found by Franzese et al (2022), with the difference that in E. cristinae they present a cilium.…”

Section: Discussionsupporting

confidence: 84%

Ultrastructure and histochemistry of the scolex of two Neotropical proteocephalidean species (Cestoda: Onchoproteocephalidea)

Mutti

Franzese

Ivanov

et al. 2023

Journal of Morphology

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The internal ultrastructure of the scolex and the histochemical composition of the apical glands of two South American proteocephalideans cestodes, Monticellia magna and Proteocephalus pimelodi, were described for the first time. The study included the use of scanning and transmission electron microscopy to observe the tegumental ultrastructure, and histochemical techniques to detect types of gland secretion. Two types of glands were found in the scolex of M. magna and P. pimelodi. The pattern of microtriches described for M. magna was confirmed and that of P. pimelodi was described for the first time. Also, the internal ultrastructure of the microtriches in both species was described. Indications of the presence of sensory receptors were also found in M. magna. Finally, the systematic value of the characters studied is discussed, such as the internal structure of the gladiate spinitriches and the apocrine gland of M. magna.

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Section: Discussionsupporting

confidence: 84%

Ultrastructure and histochemistry of the scolex of two Neotropical proteocephalidean species (Cestoda: Onchoproteocephalidea)

Mutti

Franzese

Ivanov

et al. 2023

Journal of Morphology

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“…Most recent descriptions or redescriptions of cestode species commonly include the microthrix pattern observed with SEM, which is usually of taxonomic importance. Unfortunately, the microthrix pattern of the myzorhynchus of rhinebothriideans has only been studied, to our knowledge, in eight (i.e., Echeneibothrium algeriensis , E. cristinae , E. megalosoma , E. multiloculatum , E. williamsi , N. navonae , N. shetlandicum , and Pseudanthobothrium hanseni ) of the 36 species of the family Echeneibothriidae (Benmeslem et al, 2018; Bueno & Caira, 2017; Franzese et al, 2022; Ivanov & Campbell, 2002; Randhawa et al, 2008). Several of those species show a common pattern, with spinitriches restricted to the proximal portion of the myzorhynchus (i.e., AMSP) and filitriches distributed along its entire length (i.e., AMSP and AO).…”

Section: Discussionmentioning

confidence: 99%

“…megalosoma, E. multiloculatum, E. williamsi, N. navonae, N. shetlandicum, and Pseudanthobothrium hanseni) of the 36 species of the family Echeneibothriidae (Benmeslem et al, 2018;Bueno & Caira, 2017;Franzese et al, 2022;Ivanov & Campbell, 2002;Randhawa et al, 2008).…”

Section: Microtriches On Myzorhynchus Surfacementioning

confidence: 99%

“…Also, the presence of glandular cells in the myzorhynchus has been reported for several species of the family Echeneibothriidae (i.e., Echeneibothrium cristinae, Echeneibothrium megalosoma, Echeneibothrium multiloculatum, Echeneibothrium variabile, Echeneibothrium williamsi and Pseudanthobothrium sp.) (Bueno & Caira, 2017;Caira et al, 1999;Franzese et al, 2022;Joyeux & Baer, 1935). However, to our knowledge, no study has ever analyzed the chemical nature of the secretions of these gland cells.…”

Section: Introductionmentioning

confidence: 99%

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Morphology and glandular composition of the myzorhynchus and the remnant apical organ in adult cestodes of the order Rhinebothriidea from batoids off Argentina

Franzese

Mutti

Battista

et al. 2023

Journal of Morphology

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The main objective of this study was to analyze the function of the myzorhynchus and remnant apical organ of adult cestodes in the order Rhinebothriidea. Several features of these structures were analyzed in 12 species belonging to six genera and two families. In particular, the glandular composition of the myzorhynchus of four species from Echeneibothriidae (i.e., Notomegarhynchus navonae and three species of Echeneibothrium) was studied using histochemical techniques and/or transmission electron microscopy. In addition, the presence of a remnant apical organ and its glandular composition were analized in six species of Rhinebothriidae and in two species of Semiorbiseptum, whose familial assignment is uncertain. We also evaluated the importance of these characters for diagnosis. The same type of gland cell was found in the myzorhynchus of Echeneibothrium species and in the remnant apical organ of Semiorbiseptum species. These gland cells were Coomassie brilliant bluepositive, periodic acid Schiff-positive and Alcian blue-negative, consistent with a glycoprotein secretion possibly involved in adhesion to the host mucosa and proteolysis. The type of gland cells found in the myzorhynchus of N. navonae were Coomassie brilliant blue-negative, periodic acid Schiff-positive and Alcian bluepositive, consistent with the production of adhesive and protective substances. The type of gland cells in the myzorhynchus and in the remnant apical organ could be a useful character for the generic diagnosis of Echeneibothrium and Semiorbiseptum, respectively. A remnant apical organ was only found in Semiorbiseptum, with its presence/absence being important as a diagnostic character at the generic level for Semiorbiseptum, Scalithrium, and Rhinebothroides. A secondary objective was to characterize the microthrix pattern of the myzorhynchus of N. navonae. An extended distribution of spinitriches was detected, which may allow a better adhesion of this large species to the host mucosa, as the main function of spinitriches is presumably that of adhesion.

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“…This list includes information on localities, specimens in collections, and comments about the parasites and their hosts reported in previous works. We have also incorporated information about cestodes described in the last years, which included numerous new records and new localities ( Menoret et al 2017 ; Franzese and Ivanov 2018 , 2020a , b , 2021 ; Menoret and Ivanov 2021 ; Franzese et al 2022 ; this study).…”

Section: Introductionmentioning

confidence: 99%

Tapeworms (Platyhelminthes, Cestoda) from marine chondrichthyans of the Southwestern Atlantic Ocean, and the sub-Antarctic and Antarctic islands: a checklist

Franzese¹,

Facal²,

Menoret³

2023

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A parasite-host list of cestodes parasitizing chondrichthyans in the Southwest Atlantic off Argentina and surrounding waters of Antarctica is compiled based on the available literature. The list is based on published descriptions and redescriptions of species, and newly collected worms during the current study. A total of 57 valid species belonging to 28 genera of the orders Cathetocephalidea, Diphyllidea, Gyrocotylidea, Lecanicephalidea, Onchoproteocephalidea, Phyllobothriidea, Rhinebothriidea, “Tetraphyllidea”, and Trypanorhyncha is listed. Information on hosts, localities, specimens in collections and comments on tapeworms are also included. A host-parasite list including chimaeras (1 order, 1 genus), batoids (4 orders, 10 genera), and sharks (3 orders, 5 genera) is provided. Tapeworm diversity, distribution range, and host associations are discussed. The cestodes orders Phyllobothriidea and Rhinebothriidea exhibit the highest species richness, with 13 and 12 species, respectively. Onchoproteocephalideans and rhinebothriideans have the broadest geographic distribution in the study area. Regarding hosts, arhynchobatid skates are the group most frequently associated with cestodes. However, further collecting efforts are necessary to understand whether this data reflect the real diversity and host association of these parasites or is a result of a bias in sampling.

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Morphological study of members of the genus Echeneibothrium (Cestoda: Rhinebothriidea: Echeneibothriidae) from rajiform skates of the Argentine Sea and analysis of the phylogenetic relationships within the family Echeneibothriidae

Cited by 7 publications

References 60 publications

Ultrastructure and histochemistry of the scolex of two Neotropical proteocephalidean species (Cestoda: Onchoproteocephalidea)

Ultrastructure and histochemistry of the scolex of two Neotropical proteocephalidean species (Cestoda: Onchoproteocephalidea)

Morphology and glandular composition of the myzorhynchus and the remnant apical organ in adult cestodes of the order Rhinebothriidea from batoids off Argentina

Tapeworms (Platyhelminthes, Cestoda) from marine chondrichthyans of the Southwestern Atlantic Ocean, and the sub-Antarctic and Antarctic islands: a checklist

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Morphological study of members of the genus Echeneibothrium (Cestoda: Rhinebothriidea: Echeneibothriidae) from rajiform skates of the Argentine Sea and analysis of the phylogenetic relationships within the family Echeneibothriidae

Cited by 7 publications

References 60 publications

Ultrastructure and histochemistry of the scolex of two Neotropical proteocephalidean species (Cestoda: Onchoproteocephalidea)

Ultrastructure and histochemistry of the scolex of two Neotropical proteocephalidean species (Cestoda: Onchoproteocephalidea)

Morphology and glandular composition of the myzorhynchus and the remnant apical organ in adult cestodes of the order Rhinebothriidea from batoids off Argentina

﻿Tapeworms (Platyhelminthes, Cestoda) from marine chondrichthyans of the Southwestern Atlantic Ocean, and the sub-Antarctic and Antarctic islands: a checklist

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Tapeworms (Platyhelminthes, Cestoda) from marine chondrichthyans of the Southwestern Atlantic Ocean, and the sub-Antarctic and Antarctic islands: a checklist