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Rodney A. Bray - One of the best experts on this subject based on the ideXlab platform.
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Bucephalus damriyasai n. sp. (Digenea: Bucephalidae) from the blacktip trevally Caranx heberi (Bennett) (Perciformes: Carangidae) off Bali, Indonesia
Systematic Parasitology, 2019Co-Authors: Rodney A. Bray, Harry W. Palm, Stefan TheisenAbstract:The new species Bucephalus damriyasai n. sp. is described from Caranx heberi (Bennett) from off Bali, Indonesia. It can be distinguished from other Bucephalus spp. recorded from carangid hosts by its narrow elongate body shape and the relatively long distance between the rhynchus and the Vitellarium, as well as other features distinguishing it from individual species. The most similar species are differentiated from B. damriyasai n. sp. as follows: B. carangis Yamaguti, 1970 has a much greater length, the rhynchus is smaller and the cirrus-sac is small, not always reaching to the posterior testis; B. fragilis Velasquez, 1959 is a tiny species, the pre-vitelline distance is short and the caecum is saccular; B. gorgon (Linton, 1905) is much longer and relatively broader, the uterus reaches distinctly anterior to the Vitellarium and the rhyncheal tentacles appear more complex; B. labracis Paggi & Orecchia, 1965 is distinctly longer, slightly broader, with a slightly larger rhynchus, and has shorter pre-uterine and pre-mouth distances; B. paraheterotentaculatus Velasquez, 1959 is much longer, relatively rather broad, the rhynchus is said to bear 21 tentacles, the post-testicular region and cirrus-sac reach are longer and the caecum is described as saccular; B. sphyraenae Yamaguti, 1952 is longer, slightly broader, the uterus reaches anteriorly to the Vitellarium and the caecum is claviform and oriented anteriorly; B. margaritae Ozaki & Ishibashi, 1934 (syn. B. varicus Manter, 1940) is relatively squat, has shorter pre-vitelline and pre-mouth distances and a longer post-testicular distance and cirrus-sac reach; B. yamagutii Gupta & Singh, 1985 is broader, with a relatively short pre-vitelline distance, the caecum extends anteriorly to the pharynx, but not posteriorly and the rhynchus is said to carry five tentacles. The distinctive features of B. damriyasai n. sp. are compared with those of all other marine Bucephalus spp. in a table. The number of bucephalid trematodes known from Indonesian waters is now 13, two of them await further identification. They have been described from the fish families Carangidae, Platycephalidae, Sciaenidae, Serranidae and Sphyraenidae.
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Monostephanostomum nolani sp. n. and M. krusei Reimer, 1983 (Digenea: Acanthocolpidae) from carangid fishes from coral reef waters off Australia
Folia parasitologica, 2007Co-Authors: Rodney A. Bray, Thomas H. CribbAbstract:Monostephanostomum nolani sp. n. is described from Carangoides plagiotaenia Bleeker, off Lizard Island, Great Barrier Reef, Queensland, Australia. It differs from all other species in the genus except M. manteri Kruse, 1979 in that the Vitellarium reaches into the forebody. It differs from M. manteri in the ventral hiatus in the circum-oral spine row, the extent of the Vitellarium in the forebody, where it is not confluent, its elongate pharynx and its smaller eggs. Monostephanostomum krusei Reimer, 1983 is redescribed from Pseudocaranx dentex (Bloch et Schneider) from Ningaloo Reef off Western Australia. It is considered similar to M. nolani, differing in the Vitellarium being restricted to the hindbody, but sharing with M. nolani an unusual arrangement of small body-spines on the antero-ventral surface. It is also morphologically very similar to Monostephanostomum roytmani (Parukhin, 1974), which apparently lacks the diminutive antero-ventral body-spines. A key to eight recognized species in the genus is presented.
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Stephanostomum tantabiddii n. sp. (Digenea: Acanthocolpidae) from Carangoides fulvoguttatus (Forsskal, 1775) (Perciformes: Carangidae) from Ningaloo Reef, Western Australia
Zootaxa, 2004Co-Authors: Rodney A. Bray, Thomas H. CribbAbstract:A new species, Stephanostomum tantabiddii n. sp., is described from the yellowspotted trevally Carangoides fulvoguttatus from Ningaloo Reef, Western Australia. It has 38 45 circum-oral spines and the Vitellarium reaches to no less than 17% of the hindbody length from the ventral sucker. It differs from other species of Stephanostomum with these characteristics by various combinations of the ventral hiatus of the circum-oral spine rows, the relatively long pars prostatica and short ejaculatory duct, the elongate body and the wide gaps between the gonads.
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Two species of Stephanostomum Looss, 1899 (Digenea: Acanthocolpidae) from marine fishes off Namibia, including S. beukelaardori n. sp.
Systematic parasitology, 2004Co-Authors: Rodney A. Bray, Lothar W. ReimerAbstract:Stephanostomum kovalevae Parukhin, 1968 from the intestine of Lophius vomerinus off Swakopmund, Namibia, is redescribed. It is characterised by its large number (c.73-88) of circum-oral spines, its relatively very long hindbody and the Vitellarium reaching close to or just overlapping the ventral sucker. S. beukelaardori n. sp., from the intestine of Zenopsis conchifera off Walvis Bay, Namibia, is described. It belongs to the group of species where the Vitellarium reaches the ventral sucker, and which has c.32-38 circum-oral spines. It is closest to S. casum (Linton, 1910), but differs in lacking the lining of prominent spines in the ejaculatory duct, probably in egg-size and in both forebody and hindbody lengths.
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Tormopsolus orientalis Yamaguti, 1934 (Digenea: Acanthocolpidae) from Seriola dumerili (Risso) (Perciformes: Carangidae) in the western Mediterranean Sea
Systematic parasitology, 2004Co-Authors: Pierre Bartoli, Rodney A. Bray, Francisco E. MonteroAbstract:Tormopsolus orientalis Yamaguti, 1934, is redescribed from Seriola dumerili from off Corsica, Majorca and Aguilas, SE Spain. The Vitellarium is interrupted at the level of the ovary and both testes, and a bipartite seminal vesicle is found in many specimens. Oral sucker papillae are always seen. Type-specimens and voucher specimens from off Japan, Bermuda, Panama, Curacao and the Great Barrier Reef have been compared with the Mediterranean species. Specimens of T. medius Reimer, 1983, from Mozambique have been studied and this species is synonymised with T. orientalis.
Thomas H. Cribb - One of the best experts on this subject based on the ideXlab platform.
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Paradiscogaster leichhardti sp. nov. (Digenea: Faustulidae) in Chaetodontoplus meredithi (Perciformes: Pomacanthidae) from Heron Island, Great Barrier Reef
Memoirs of the Queensland museum, 2013Co-Authors: Pablo E. Diaz, Thomas H. CribbAbstract:Paradiscogaster leichhardti sp. nov. (Digenea: Faustulidae) is described from the intestine of Chaetodontoplus meredithi (Perciformes: Pomacanthidae) from the southern Great Barrier Reef. The new species is distinguished by its elongate, spindle-shaped body and Vitellarium which forms separate groups at the level of the anterior and posterior ends of the cirrus-sac. This is the second species of Paradiscogaster reported from pomacanthid fishes.
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Monostephanostomum nolani sp. n. and M. krusei Reimer, 1983 (Digenea: Acanthocolpidae) from carangid fishes from coral reef waters off Australia
Folia parasitologica, 2007Co-Authors: Rodney A. Bray, Thomas H. CribbAbstract:Monostephanostomum nolani sp. n. is described from Carangoides plagiotaenia Bleeker, off Lizard Island, Great Barrier Reef, Queensland, Australia. It differs from all other species in the genus except M. manteri Kruse, 1979 in that the Vitellarium reaches into the forebody. It differs from M. manteri in the ventral hiatus in the circum-oral spine row, the extent of the Vitellarium in the forebody, where it is not confluent, its elongate pharynx and its smaller eggs. Monostephanostomum krusei Reimer, 1983 is redescribed from Pseudocaranx dentex (Bloch et Schneider) from Ningaloo Reef off Western Australia. It is considered similar to M. nolani, differing in the Vitellarium being restricted to the hindbody, but sharing with M. nolani an unusual arrangement of small body-spines on the antero-ventral surface. It is also morphologically very similar to Monostephanostomum roytmani (Parukhin, 1974), which apparently lacks the diminutive antero-ventral body-spines. A key to eight recognized species in the genus is presented.
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Stephanostomum tantabiddii n. sp. (Digenea: Acanthocolpidae) from Carangoides fulvoguttatus (Forsskal, 1775) (Perciformes: Carangidae) from Ningaloo Reef, Western Australia
Zootaxa, 2004Co-Authors: Rodney A. Bray, Thomas H. CribbAbstract:A new species, Stephanostomum tantabiddii n. sp., is described from the yellowspotted trevally Carangoides fulvoguttatus from Ningaloo Reef, Western Australia. It has 38 45 circum-oral spines and the Vitellarium reaches to no less than 17% of the hindbody length from the ventral sucker. It differs from other species of Stephanostomum with these characteristics by various combinations of the ventral hiatus of the circum-oral spine rows, the relatively long pars prostatica and short ejaculatory duct, the elongate body and the wide gaps between the gonads.
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Pholeohedra overstreeti n.g., n.sp. (Digenea : Haploporidae) from Girella zebra (Kyphosidae) in south Australia
Systematic Parasitology, 1998Co-Authors: Thomas H. Cribb, Sylvie Pichelin, Rodney A. BrayAbstract:Pholeohedra overstreeti n. g., n. sp. (Digenea: Haploporidae) is described from Girella zebra (Kyphosidae) in South Australia. The new genus is compared with all genera of Haploporidae sensu lato (including Atractotrematidae, Megasolenidae and Waretrematidae) and has a unique bell-shaped concavity at its posterior end. The genus otherwise resembles Hapladena in the arrangement of the testis, Vitellarium and gut but also resembles Megasolena, Metamegasolena and Vitellibaculum except in having a single testis. This is the first haploporid reported from kyphosid fishes in Australia.
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Paralepidapedon ostorhinchi (Korotaeva, 1974) n. comb. (Digenea: Lepocreadiidae) in Oplegnathus woodwardi (Waite) (Teleostei: Perciformes: Oplegnathidae) from off Rottnest Island, Western Australia
Systematic Parasitology, 1997Co-Authors: Rodney A. Bray, Thomas H. CribbAbstract:The digenean originally designated Lepidapedon (Lepidapedon) ostorhinchi is redescribed from its type-host, Oplegnathus woodwardi [= Ostorhinchus conwaii], from the waters off Western Australia. The discovery of a uroproct indicates that the generic designation is wrong and the worm should be Paralepidapedon ostorhinchi (Korotaeva, 1974) n. comb. It is distinct from its nearest relative, P. hoplognathi (Yamaguti, 1938), in having: a prominent post-oral ring; a distinct oesophagus; short anterior diverticula on the caeca; a long external seminal vesicle, ensheathed in a membrane bound gland-cell mass; and less anteriorly extensive Vitellarium.
Reinaldo José Da Silva - One of the best experts on this subject based on the ideXlab platform.
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Urotrema macrotestis and Urotrema scabridum (Digenea: Urotrematidae) parasitizing bats (Mammalia: Chiroptera) in Brazil.
Anais da Academia Brasileira de Ciencias, 2019Co-Authors: Érica Munhoz De Mello, Élida Mara Leite Rabelo, Reinaldo José Da SilvaAbstract:Urotrema scabridum Braun 1900 and Urotrema macrotestis Mane-Garzon and Telias 1965 are reported from the small intestine of Eumops glaucinus (Wagner, 1843). The species were differentiated by the body width, the size and position of acetabulum, the size of testis, the caecal termination, and the distribution of Vitellarium. The present study expands the distribution and the hosts of both species in Minas Gerais State and reports U. macrotestis parasitizing bats for the first time.
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Urotrema macrotestis and Urotrema scabridum (Digenea: Urotrematidae) parasitizing bats (Mammalia: Chiroptera) in Brazil
Academia Brasileira de Ciências, 2019Co-Authors: Érica Munhoz De Mello, Élida Mara Leite Rabelo, Reinaldo José Da SilvaAbstract:Urotrema scabridum Braun 1900 and Urotrema macrotestis Mané-Garzón and Telias 1965 are reported from the small intestine of Eumops glaucinus (Wagner, 1843). The species were differentiated by the body width, the size and position of acetabulum, the size of testis, the caecal termination, and the distribution of Vitellarium. The present study expands the distribution and the hosts of both species in Minas Gerais State and reports U. macrotestis parasitizing bats for the first time
David I. Gibson - One of the best experts on this subject based on the ideXlab platform.
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Ultrastructural characteristics of the Vitellarium of basal polyopisthocotylean monogeneans of the family Hexabothriidae, with comments on glycan vesicle development and its phylogenetic significance
Zoologischer Anzeiger, 2017Co-Authors: Larisa G. Poddubnaya, Willy Hemmingsen, Cecile Reed, David I. GibsonAbstract:Abstract Transmission electron microscopical observations were made on the Vitellarium of two basal polyopisthocotylean monogeneans, the hexabothriids Rajonchocotyle emarginata from the ray Amblyraja radiata in the Norwegian Sea and Callorhynchocotyle callorhynchi from the chimaera Callorhynchus capensis in the South-east Atlantic Ocean. The characteristics of the follicular Vitellarium of these parasites are described and compared with those of other monogeneans and other groups of free-living and parasitic Platyhelminthes. A very close association between the Vitellarium and intestinal diverticula is indicated by the presence of special intercellular junctions linking vitellocytes and intestinal epithelial cells. The absence of any sort of specialized sheath around the vitelline follicles and the presence of a single cell type appear to be discriminatory traits of polyopisthocotylean monogeneans. The characters of two types of vitelline inclusions, shell globules and glycan vesicles, have been considered. Differences in the amount of lipid droplets and glycogen in fully-developed vitellocytes of the two hexabothriids may depend on the different nature and life-styles of their hosts. Three steps in the development of glycan vesicles are apparent in these hexabothriids: (a) membrane-bound glycan vesicles (ca. 0.2–0.3 μm in diameter) containing moderately dense particles; (b) glycan vesicles (ca. 0.5–2.0 μm in diameter) with a condensed content in the form of two or three homogeneous glycan bodies; and (c) glycan clusters (up to 6 μm in diameter) containing small glycan bodies modified to exhibit a uniform, heterogeneous, mosaic pattern, within part or all of which glycogen-like particles later develop. The features of the vitelline inclusions within the vitellocytes of these two basal hexabothriids are considered in terms of the phylogeny of the phylum.
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Ultrastructure of the Vitellarium of Ancyrocephalus paradoxus (Monogenea: Monopisthocotylea), with comments on the nature of the Vitellarium in the Monogenea and related platyhelminth groups
Parasitology research, 2012Co-Authors: Larisa G. Poddubnaya, Zdzisław Świderski, Magdaléna Bruňanská, David I. GibsonAbstract:Fine structural features of the vitelline follicles of the monopisthocotylean monogenean Ancyrocephalus paradoxus are revealed and compared with those of other monogenean species. As in other monogeneans, each vitelline follicle of A. paradoxus is composed of a single cell type, i.e. vitellocytes at various stages of development, with no sign of any interstitial cells. There is no special isolation of the vitelline follicles from the surrounding tissue, and both heterologous (between adjacent membranes of the vitelline and surrounding parenchymal cells) and homologous (between adjacent membranes of the vitelline cells) cell junctions (zonulae occludentes) are present. Non-membrane-bound vitelline clusters of A. paradoxus contain 50–100 vitelline globules, moderately electron-dense lipid droplets and glycogen particles present in the mature cell cytoplasm. In a search for phylogenetically informative characters of the fine structure of the Vitellarium, the new findings are compared with those known for trematodes, and, to enable this, additional observations were made on the structure of the Vitellarium of the aspidogastrean Aspidogaster limacoides. Some new discriminatory traits are revealed in A. limacoides; these include the presence of a single type of cellular component within the Vitellarium, sarcoplasmic processes filling the space between and around the vitellocytes and zonulae occludentes between adjacent membranes of vitelline and muscle cells. On the basis of ultrastructural features of the Vitellarium, a relationship between the Monogenea and the Aspidogastrea is indicated.
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Ultrastructure of the Vitellarium in the digeneans Phyllodistomum angulatum (Plagiorchiida, Gorgoderidae) and Azygia lucii (Strigeida, Azygiidae)
Acta Parasitologica, 2012Co-Authors: Larisa G. Poddubnaya, Magdaléna Bruňanská, Zdzisław Świderski, David I. GibsonAbstract:Fine structural features of the Vitellarium of two digeneans, Phyllodistomum angulatum and Azygia lucii , are documented and compared with those of other digenean species. The cytodifferentiation of immature vitelline cells (vitellocytes) assumes the production and subsequent accumulation in their cytoplasm of several inclusions. Mature vitelline cells of P. angulatum are characterized by the presence of vitelline clusters (∼2.7 μm in diameter, with ∼100 vitelline globules of ∼0.35 μm in diameter) and osmiophobic, saturated lipid droplets (∼2-3 μm in diameter), and in A. lucii vitelline clusters of the same diameter include much fewer vitelline globules (∼50 globules of ∼0.5 μm in diameter), osmiophilic lipid droplets and α-glycogen. In both P. angulatum and A. lucii , interstitial cells are also present within the Vitellarium. Two types of contact sites (septate and tight junctions) between adjoining interstitial cells also occur in both digenean species. Judging from the present and previous ultrastructural studies, it is suggested that there are three potential discriminatory characters of the digenean Vitellarium (the number of different types of cell components within the Vitellarium, the presence and type of junctional complexes between these cells, and the isolation of the Vitellarium from the surrounding tissue) which may prove useful for a better understanding of the biology and evolutionary history of the different digenean groups.
Larisa G. Poddubnaya - One of the best experts on this subject based on the ideXlab platform.
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Ultrastructural characteristics of the Vitellarium of basal polyopisthocotylean monogeneans of the family Hexabothriidae, with comments on glycan vesicle development and its phylogenetic significance
Zoologischer Anzeiger, 2017Co-Authors: Larisa G. Poddubnaya, Willy Hemmingsen, Cecile Reed, David I. GibsonAbstract:Abstract Transmission electron microscopical observations were made on the Vitellarium of two basal polyopisthocotylean monogeneans, the hexabothriids Rajonchocotyle emarginata from the ray Amblyraja radiata in the Norwegian Sea and Callorhynchocotyle callorhynchi from the chimaera Callorhynchus capensis in the South-east Atlantic Ocean. The characteristics of the follicular Vitellarium of these parasites are described and compared with those of other monogeneans and other groups of free-living and parasitic Platyhelminthes. A very close association between the Vitellarium and intestinal diverticula is indicated by the presence of special intercellular junctions linking vitellocytes and intestinal epithelial cells. The absence of any sort of specialized sheath around the vitelline follicles and the presence of a single cell type appear to be discriminatory traits of polyopisthocotylean monogeneans. The characters of two types of vitelline inclusions, shell globules and glycan vesicles, have been considered. Differences in the amount of lipid droplets and glycogen in fully-developed vitellocytes of the two hexabothriids may depend on the different nature and life-styles of their hosts. Three steps in the development of glycan vesicles are apparent in these hexabothriids: (a) membrane-bound glycan vesicles (ca. 0.2–0.3 μm in diameter) containing moderately dense particles; (b) glycan vesicles (ca. 0.5–2.0 μm in diameter) with a condensed content in the form of two or three homogeneous glycan bodies; and (c) glycan clusters (up to 6 μm in diameter) containing small glycan bodies modified to exhibit a uniform, heterogeneous, mosaic pattern, within part or all of which glycogen-like particles later develop. The features of the vitelline inclusions within the vitellocytes of these two basal hexabothriids are considered in terms of the phylogeny of the phylum.
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Ultrastructural characteristics of the Vitellarium of Brandesia turgida (Brandes, 1888) (Digenea: Pleurogenidae) and an examination of the potential usefulness of such vitelline traits in digenean systematics
Helminthologia, 2013Co-Authors: Larisa G. Poddubnaya, Magdaléna Bruňanská, T. Brázová, A. E. Zhokhov, D. I. GibsonAbstract:Transmission electron microscopical observations were made on the vitelline structure of the digenean Brandesia turgida (Brandes, 1888) collected from crypts within the intestinal wall of the frog Pelophylax ridibundus (Pallas, 1771). Ultrastructural details of the vitelline follicles of B . turgida include: (a) the presence within the Vitellarium of a single type of cell, i.e. vitellocytes at different stages of their development; (b) a narrow region between the vitellocytes filled with the processes of surrounding parenchymal cells; and (c) the occurrence of the junctional complexes between the vitellocytes and the surrounding parenchymal cells at the periphery of the vitelline follicles. It is shown that the vitelline globules and a few lipid droplets are the main inclusions resulting from vitellocyte synthetic activity. The limited amount of nutritive reserves in the vitellocytes can be explained by the nature of the parasite’s life-cycle, which is characterized by fully-embryonated intrauterine eggs containing a fully-formed miracidium. Despite the small number of digenean species studied in relation to their vitelline cytoarchitecture, two structural patterns of the Vitellarium can be elucidated; these are examined in terms of digenean systematic relationships.
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Ultrastructure of the Vitellarium of Ancyrocephalus paradoxus (Monogenea: Monopisthocotylea), with comments on the nature of the Vitellarium in the Monogenea and related platyhelminth groups
Parasitology research, 2012Co-Authors: Larisa G. Poddubnaya, Zdzisław Świderski, Magdaléna Bruňanská, David I. GibsonAbstract:Fine structural features of the vitelline follicles of the monopisthocotylean monogenean Ancyrocephalus paradoxus are revealed and compared with those of other monogenean species. As in other monogeneans, each vitelline follicle of A. paradoxus is composed of a single cell type, i.e. vitellocytes at various stages of development, with no sign of any interstitial cells. There is no special isolation of the vitelline follicles from the surrounding tissue, and both heterologous (between adjacent membranes of the vitelline and surrounding parenchymal cells) and homologous (between adjacent membranes of the vitelline cells) cell junctions (zonulae occludentes) are present. Non-membrane-bound vitelline clusters of A. paradoxus contain 50–100 vitelline globules, moderately electron-dense lipid droplets and glycogen particles present in the mature cell cytoplasm. In a search for phylogenetically informative characters of the fine structure of the Vitellarium, the new findings are compared with those known for trematodes, and, to enable this, additional observations were made on the structure of the Vitellarium of the aspidogastrean Aspidogaster limacoides. Some new discriminatory traits are revealed in A. limacoides; these include the presence of a single type of cellular component within the Vitellarium, sarcoplasmic processes filling the space between and around the vitellocytes and zonulae occludentes between adjacent membranes of vitelline and muscle cells. On the basis of ultrastructural features of the Vitellarium, a relationship between the Monogenea and the Aspidogastrea is indicated.
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Ultrastructure of the Vitellarium in the digeneans Phyllodistomum angulatum (Plagiorchiida, Gorgoderidae) and Azygia lucii (Strigeida, Azygiidae)
Acta Parasitologica, 2012Co-Authors: Larisa G. Poddubnaya, Magdaléna Bruňanská, Zdzisław Świderski, David I. GibsonAbstract:Fine structural features of the Vitellarium of two digeneans, Phyllodistomum angulatum and Azygia lucii , are documented and compared with those of other digenean species. The cytodifferentiation of immature vitelline cells (vitellocytes) assumes the production and subsequent accumulation in their cytoplasm of several inclusions. Mature vitelline cells of P. angulatum are characterized by the presence of vitelline clusters (∼2.7 μm in diameter, with ∼100 vitelline globules of ∼0.35 μm in diameter) and osmiophobic, saturated lipid droplets (∼2-3 μm in diameter), and in A. lucii vitelline clusters of the same diameter include much fewer vitelline globules (∼50 globules of ∼0.5 μm in diameter), osmiophilic lipid droplets and α-glycogen. In both P. angulatum and A. lucii , interstitial cells are also present within the Vitellarium. Two types of contact sites (septate and tight junctions) between adjoining interstitial cells also occur in both digenean species. Judging from the present and previous ultrastructural studies, it is suggested that there are three potential discriminatory characters of the digenean Vitellarium (the number of different types of cell components within the Vitellarium, the presence and type of junctional complexes between these cells, and the isolation of the Vitellarium from the surrounding tissue) which may prove useful for a better understanding of the biology and evolutionary history of the different digenean groups.
