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2. A new species of Australotaenia (Cestoda: Proteocephalidea) from a snake in Cambodia: host switching or postcyclic parasitism in a distant region?
- Creator:
- Chambrier, Alain de and Scholz, Tomáš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- taxonomy, zoogeography, tapeworms, helminths, Reptilia, South East Asia, and Indomalayan Region
- Language:
- English
- Description:
- Australotaenia de Chambrier et de Chambrier, 2010 has been proposed to accommodate two species of proteocephalidean cestodes from hylid frogs (Litoria spp.) in Australia. Recently, apparently congeneric cestode, for which the name A. bunthangi sp. n. is proposed, was found in the homalopsid snake Enhydris enhydris (Schneider) (Serpentes: Homalopsidae) from South-East Asia (Cambodia). This finding indicates a much wider range of definitive hosts of species of this genus, i.e. amphibians and reptiles, which is exceptional among proteocephalideans. Postcyclic parasitism, i.e. predation of the definitive host infected with sexually mature parasites, cannot be excluded but does not seem to be probable. In addition, the occurrence of A. bunthangi in the former Indochina extends the range of the geographical distribution of the genus to another zoogeographical region. The new species differs from both species of Australotaenia in the relative size of an apical organ, the diameter of which equals to that of suckers (versus much smaller in the remaining species, in which the width of the apical organ represents less than 2/3 of the diameter of the suckers), much smaller scolex and suckers (width 150 μm and diameter of suckers 50-55 μm versus 245-420 μm and 100-140 μm, respectively), and longer body (224 mm versus 57-121 mm). In addition, A. bunthangi differs from A. hylae (Johnston, 1912) (type-species of the genus) by the number of testes (46-64 versus 74-106 in A. hylae) and by the ovary width/proglottis width ratio (55-65% versus 68-71% in A. hylae). Australotaenia bunthangi differs from A. grobeli de Chambrier et de Chambrier, 2010 by relative size of the cirrus-sac (its length represents 18-24% of the width of the proglottis versus 27-33% in A. grobeli) and by the diameter of the embryophore (25-27 µm versus 18-23 µm in A. grobeli).
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. Bothriocephalidean tapeworms (Cestoda) from the blackfish, Centrolophus niger (Perciformes: Centrolophidae)
- Creator:
- Kuchta, Roman, Scholz, Tomáš, Brabec, Jan, Jirsová, Dagmar, and Gustinelli, Andrea
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Bothriocephalidea, species survey, Amphicotyle heteropleura, Bothriocotyle solinosomum, Echinophallus wageneri, Milanella familiaris, morphology, taxonomy, and identification key
- Language:
- English
- Description:
- Bothriocephalidean tapeworms parasitic in the blackfish, Centrolophus niger (Gmelin) (Perciformes: Centrolophidae), are redescribed on the basis of the evaluation of freshly collected specimens and museum material. This evaluation enabled us to supplement species diagnoses by new morphological characters of potential use for phylogenetic analyses, including the data from scanning electron microscopical observations, and to provide a key to identification of the following four species occurring in this fish: Amphicotyle heteropleura (Diesing, 1850); Milanella familiaris Kuchta et Scholz, 2008 (both Triaenophoridae); Bothriocotyle solinosomum Ariola, 1900; and Echinophallus wageneri (Monticelli, 1890) (both Echinophallidae). Large spiniform microtriches were observed on the surface of the posterodorsal margin of segments of B. solinosomum, E. wageneri and M. familiaris. The invalidity of Atelemerus Guiart, 1935, first proposed by Bray et al. (1994), is supported by the present data and its type species, A. acanthodes Guiart, 1935, is newly synonymised with E. wageneri.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
4. Caryophyllidean tapeworms (Platyhelminthes: Eucestoda) from freshwater fishes in Japan
- Creator:
- Scholz, Tomáš, Shimazu, Takeshi, Olson, Peter D., and Nagasawa, Kazuya
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Cestoda, Caryophyllidea, Japan, taxonomy, morphology, and zoogeography
- Language:
- English
- Description:
- The following caryophyllidean tapeworms were found in freshwater fishes from Japan (species reported from Japan for the first time marked with an asterisk): family Caryophyllaeidae: Paracaryophyllaeus gotoi (Motomura, 1927) from Misgurnus anguillicaudatus (Cantor); Archigetes sieboldi Leuckart, 1878 from Pseudorasbora parva (Temminck et Schlegel) and Sarcocheilichthys variegatus microoculus Mori (new hosts); family Lytocestidae: *Caryophyllaeides ergensi Scholz, 1990 from Tribolodon hakuensis (Günther), T. ezoe Okada et Ikeda, Hemibarbus barbus (Temminck et Schlegel) and Chaenogobius sp. (new hosts); Khawia japonensis (Yamaguti, 1934) from Cyprinus carpio Linnaeus; K. sinensis Hsü, 1935 from H. barbus (new host) and C. carpio; *K. parva (Zmeev, 1936) from Carassius auratus langsdorfii Valenciennes in Cuvier et Valenciennes and Carassius sp. (new hosts); and *Atractolytocestus sagittatus (Kulakovskaya et Akhmerov, 1962) from C. carpio; family Capingentidae: *Breviscolex orientalis Kulakovskaya, 1962 from H. barbus (new host); and Caryophyllidea gen. sp. (probably Breviscolex orientalis) from C. carpio. The validity of C. ergensi, originally described from Leuciscus leuciscus baicalensis from Mongolia, is confirmed on the basis of an evaluation of extensive material from Japan. Atractolytocestus sagittatus (syn. Markevitschia sagittata) is tentatively considered a valid species, differing from the only congener, A. huronensis Anthony, 1958, in its considerably greater number of testes.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
5. Conflict between morphology and molecular data: a case of the genus Caryophyllaeus (Cestoda: Caryophyllidea), monozoic tapeworms of cyprinid fishes
- Creator:
- Bazsalovicsová, Eva, Králová-Hromadová, Ivica, Brabec, Jan, Hanzelová, Vladimíra, Oros, Mikuláš, and Scholz, Tomáš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- scolex morphology, morphological plasticity, Caryophyllaeus laticeps, Caryophyllaeus brachycollis, mitochondrial haplotypes, cox1, lsrDNA, and morphotypes
- Language:
- English
- Description:
- Molecular analysis of an extensive specimen collection of morphologically distinct tapeworms of the genus Caryophyllaeus Gmelin, 1790 (Cestoda: Caryophyllidea), parasites of cyprinid fishes in the Palaearctic Region, brought evidence of host-related plasticity in critical morphological characters widely used for species circumscription and classification of these tapeworms. The results obtained here do not support the traditionally used morphological concept of species-defining characters of the order Caryophyllidea Carus, 1863, especially due to high morphological plasticity of the scolex and the anterior end of the body. Several morphotypes within both Caryophyllaeus laticeps (Pallas, 1781) and Caryophyllaeus brachycollis Janiszewska, 1953 generally corresponding to different hosts and geographical regions, were recognised likely suggesting host- and geography-related intraspecific morphological variability. Genetic data confirmed euryxenous host specificity of both species, most profoundly C. laticeps, but did not support the existence of cryptic species. In fact, some of the fish hosts may harbour both of the congeneric species including several of their respective morphotypes. The pattern of morphological and genetic divergence observed in both cestode species studied indicates a scenario of possible host range extensions and subsequent parasite diversification. If molecular sequence variability and host-related morphological polymorphism are confirmed in other groups of monozoic cestodes, it may complicate species identification and straightforward classification of these parasites.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
6. D.I. Gibson, A. Jones, R.A. Bray (Eds.): Keys to the Trematoda. Volume I.
- Creator:
- Scholz, Tomáš and Horák, Petr
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- English
- Description:
- Autoři recenze: Tomáš Scholz, Petr Horák
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
7. D.T.J. Littlewood, R.A. Bray (Eds.): Interrelationships of the Platyhelminthes
- Creator:
- Scholz, Tomáš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- English
- Description:
- Autor recenze: Tomáš Scholz
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
8. F. Moravec: Checklist of the Metazoan Parasites of Fishes of the Czech Republic and the Slovak Republic (1873-2000)
- Creator:
- Scholz, Tomáš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- English
- Description:
- Autor recenze: Tomáš Scholz
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
9. Fine structure of the female reproductive ducts of Cyathocephalus truncatus (Cestoda: Spathebothriidea), from salmonid fish
- Creator:
- Poddubnaya, Larisa G., Mackiewicz, John S., Bruňanská, Magdaléna, and Scholz, Tomáš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Cyathocephalus truncatus, ultrastructure, ovary, uterus, associated female ducts and glands, and cestode evolution
- Language:
- English
- Description:
- The fine structure of the ovary, ovicapt, oviduct, fertilisation canal, vitelline ducts, vitelline reservoir, ovovitelline duct, ootype and Mehlis' gland, and proximal, middle and distal parts of the uterus of the spathebothriidean cestode, Cyathocephalus truncatus (Pallas, 1781), from salmoniform fish, has been studied for the first time by transmission electron microscopy (TEM). Emphasis was given to characteristics which might shed light on the unclarified phylogenetic position of spathebothriideans, belonging among the most basal tapeworms (Eucestoda). New for cestodes is the finding of a multinucleate cell that plugs the ovicapt lumen. The morphology of the proximal part of the oviduct resembles that of the pseudophyllidean tapeworm Diphyllobothrium latum. After fertilisation in the fertilisation canal, vitellocytes of C. truncatus become associated with fertilized oocytes in the ovovitelline duct. Only one type of Mehlis' gland secretory cell is present. The eggs with electron-dense eggshells containing large pores first appear in the proximal part of the uterus. The middle portion of the uterus has well-developed uterine glands. The distal portion of the uterus has apical microtriches. Ultrastructural data on the female genital system of C. truncatus are compared and discussed with those for other cestodes. However, on the basis of available ultrastructural data it is not possible to conclude whether the Spathebothriidea are phylogenetically closer to the Caryophyllidea or to the Pseudophyllidea.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
10. First species of Ophiotaenia (Cestoda: Proteocephalidea) from Madagascar: O. georgievi sp. n., a parasite of the endemic snake Leioheterodon geayi (Colubridae)
- Creator:
- Chambrier, Alain de, Ammann, Morgane, and Scholz, Tomáš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Eucestoda, Proteocephalidea, Ophiotaenia georgievi, morphology, Ophidia, and helminths
- Language:
- English
- Description:
- Ophiotaenia georgievi sp. n. (Proteocephalidea: Proteocephalinae) is described from the intestine of endemic colubrid snake Leioheterodon geayi Mocquard (Colubridae) from Antananarivo in Madagascar. The new species is the first species of Ophiotaenia La Rue, 1911 reported from Madagascar. It differs from all Ophiotaenia species parasitic in African snakes in the possession of a three-layered embryophore of eggs (other African species have two-layered embryophore). Furthermore, O. georgievi can be distinguished by the number of testes (92-140), width of the scolex (225-235 µm), total body length (57 mm), cirrus-sac length/proglottis width ratio (19-32%), and number of lateral uterine diverticula (23-28 on each side). Ophiotaenia georgievi represents the second proteocephalidean cestode reported from Madagascar, the first one being Deblocktaenia ventosaloculata (Deblock, Rosé et Broussart, 1962), a parasite from Ithycyphus miniatus. A list of Ophiotaenia species parasitic in venomous and non-venomous snakes is provided and possible existence of other new congeneric species in snakes from Madagascar is discussed.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
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