Scanning Electron Microscopy of the Scolices of the Cestodes Parachristianella monomegacantha Kruse 1959 (Trypanorhyncha) and Phyllobothrium sp. Beneden 1849 (Tetraphyllidea)

Whittaker, F. H.; Apkarian, Robert P.; Curless, Bill

doi:10.2307/3282025

Cited by 13 publications

(7 citation statements)

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“…Halton and McKerr 1979;Whittaker et al 1982Whittaker et al , 1985Shields 1985;Campbell and Beveridge, 1987;Richmond and Caira 1991;Palm 1995Palm , 2004Beveridge and Campbell 2001), being present also in the related Diphyllidea and in other primitive tapeworms. Consequently, Richmond and Caira (1991) suggested the presence of palmate microtriches as a synapomorphy of the members of Trypanorhyncha, as the species examined presented this type of microtriche on their scolex.…”

Section: Discussionmentioning

confidence: 96%

First record of Progrillotia dasyatidis Beveridge Neifar and Euzet, 2004 (Cestoda: Trypanorhyncha) plerocerci from Teleost fishes off the Portuguese coast, with a description of the surface morphology

et al. 2005

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Plerocerci of Progrillotia dasyatidis Beveridge et al. (2004), family Progrillotiidae Palm (2004), are reported from several teleost fishes off the Portuguese coast, giving a first insight into the life cycle biology of these unique trypanorhynchs. The first description and assignment of the plerocercus to P. dasyatidis is based on morphological features, such as scolex and bothria morphology and tentacular hook arrangement, and is expanded to incorporate the surface morphology, examined by scanning electron microscopy, constituting the first ultrastructural study for a species within this family. Comparisons with other species of the genus Progrillotia are made, based on the scolex and bothria morphology and tentacular hook arrangement, in order to give an overview into the variability within this genus, whereas comparisons with adults from the same species evidence the variability within the same species. The systematic approaches of Campbell and Beveridge (1994) and Palm (1997, 2004) are discussed and emphasis is placed on the utility of microtriches and the characteristic life cycle within the genus as systematic characters.

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Section: Discussionmentioning

confidence: 96%

First record of Progrillotia dasyatidis Beveridge Neifar and Euzet, 2004 (Cestoda: Trypanorhyncha) plerocerci from Teleost fishes off the Portuguese coast, with a description of the surface morphology

et al. 2005

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“…Whittaker et al (1985) found pits and filamentous structures on the apical region of the scolex between the bothridial margins of Parachristianella monomegacantha (Eutetrarhynchidae). The bothridial margins and outer surfaces possessed "short cylindrical structures".…”

Section: Discussionmentioning

confidence: 99%

“…The unusual surface features discovered in recent ultrastructural investigations of the scoleces of trypanorhynch tapeworms (e.g., Whittaker et al, 1982;Whittaker et al, 1985) have led a number of authors to suggest that these structures may be of some systematic value (e.g. McCullough & Fairweather, 1983;Shields, 1985;Carvajal et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

Morphological investigations into Floriceps minacanthus (Trypanorhyncha: Lacistorhynchidae) with analysis of the systematic utility of scolex microtriches

Richmond

Caira

1991

Syst Parasitol

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Specimens of Floriceps minacanthus Campbell & Beveridge, 1987 are reported from Carcharhinus melanopterus (Quoy & Gaimard, 1824) taken in the waters surrounding the island of Kirimati in the Republic of Kiribati in the Central Pacific Ocean. This represents a new host and a new locality record. The description of this species is expanded to include the presence of an ovary which is bilobed in cross section and a hermaphroditic duct. The surface features were examined by scanning electron microscopy. With the exception of the lateral margins of the bothridia and the apical region of the scolex, the scolex was found to be covered with palmate microtriches interspersed with filiform microtriches. The palmate microtriches varied in number of digitiform extensions depending on location. Elongate, bifid microtriches were present in the transition zone between the proximal and distal surfaces along the lateral margins of the bothridia. The apical region of the scolex was covered with filiform microtriches. The surface of the anterior margin of the strobila was covered with broad, flattened scale-like structures. The pattern of microthrix distribution was repeated for each of the bothridia of an individual, and this pattern was intraspecifically invariable. Comparison of our results with those from the seven other trypanorhynch species examined by previous authors with SEM indicates that there is much interspecific variability in both the morphology of microtriches present as well as their location on the scolex. This, coupled with the lack of intraspecific variability, confirms that these structures are systematically informative.

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“…Thus, D. cortezensis, D. tenuispinis, D. spinosa, and D. taminii The two species of Parachristianella studied at SEM, i.e. Pa. monomegacantha and Pa. damiani, share a similar pattern, having filitriches on most surfaces and aristate gladiate or lingulate spinitriches covering the distal bothrial surface (Whittaker et al 1985, Palm 2004. However, Pa. damiani lacks palmate spinitriches on the scolex peduncle described in Pa. monomegacantha.…”

Section: Discussionmentioning

confidence: 91%

“…It is partially known in 12 species, including 8 species of Dollfusiella and 2 species of Parachristianella (see Whittaker et al 1985, Beveridge et al 2004, Palm 2004, Friggens and Duszynski 2005, Chervy 2009). The presence of spinitriches covering the surface of the scolex peduncle has been used as a diagnostic feature in species of Dollfusiella (see Beveridge et al 2004, Schaeffner andBeveridge 2013c).…”

Section: Discussionmentioning

confidence: 99%

Eutetrarhynchid trypanorhynchs (Cestoda) from elasmobranchs off Argentina, including the description of Dollfusiella taminii sp. n. and Parachristianella damiani sp. n., and amended description of Dollfusiella vooremi (São Clemente et Gomes, 1989)

Menoret¹,

Ivanov²

2014

FOLIA PARASIT

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Eutetrarhynchid tapeworms currently comprise more than 90 marine species and 2 species reported from rivers in South America (Palm 2004, Campbell and Beveridge 2006, Schaeffner and Beveridge 2012, 2013a,b,c, Haseli 2013, Schaeffner 2014. Among the 17 genera considered valid in the family, Dollfusiella Campbell et , Prochristianella Dollfus, 1946, and Parachristianella Dollfus, 1946 are the most species-rich with 27, 20 and 9 species, respectively. Although the eutetrarhynchids are well represented in a diverse array of hosts worldwide, only a few records exist from the southwestern Atlantic, all belonging to species of Dollfusiella. Dollfusiella vooremi (São Clemente et Gomes, 1989) 1989a, Tanzola et al. 1998, Alarcos et al. 2006. Also a plerocercus of an unidentified species of Dollfusiella was reported from the teleost Micropogonias furnieri (Desmarest) in Brazil (Pereira and Boeger 2005).During a parasitological survey of teleosts and elasmobranchs in the Argentine Sea, 3 species of eutetrarhynchids were collected from batoids (Myliobatis goodei Garman and Psammobatis bergi Marini) and sharks (Mu. schmitti).

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Scanning Electron Microscopy of the Scolices of the Cestodes Parachristianella monomegacantha Kruse 1959 (Trypanorhyncha) and Phyllobothrium sp. Beneden 1849 (Tetraphyllidea)

Cited by 13 publications

References 0 publications

First record of Progrillotia dasyatidis Beveridge Neifar and Euzet, 2004 (Cestoda: Trypanorhyncha) plerocerci from Teleost fishes off the Portuguese coast, with a description of the surface morphology

First record of Progrillotia dasyatidis Beveridge Neifar and Euzet, 2004 (Cestoda: Trypanorhyncha) plerocerci from Teleost fishes off the Portuguese coast, with a description of the surface morphology

Morphological investigations into Floriceps minacanthus (Trypanorhyncha: Lacistorhynchidae) with analysis of the systematic utility of scolex microtriches

Eutetrarhynchid trypanorhynchs (Cestoda) from elasmobranchs off Argentina, including the description of Dollfusiella taminii sp. n. and Parachristianella damiani sp. n., and amended description of Dollfusiella vooremi (São Clemente et Gomes, 1989)

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