Showing papers on "Digenea published in 1995"
TL;DR: The following species are described from fishes in deep-waters of the northwestern Atlantic Ocean: Fellodistomidae: Steringophorus furciger from Antimora rostrata, Coryphaenoides (Lionurus) carapinus, Lycenchelys paxillus, Lycodes atlanticus, and Zoogonidae: Brachyenteron rissoanum n.
Abstract: The following species are described from fishes in deep-waters of the northwestern Atlantic Ocean: Fellodistomidae: Steringophorus furciger from Antimora rostrata, Coryphaenoides (Lionurus) carapinus, Lycenchelys paxillus, L. verrillii and Lycodes atlanticus; S. blackeri from Xenodermichthys copei, S. haedrichi n. sp. from Porogadus milesi, characterised by its lobate testes, sucker-ratio and long vitelline fields Megenteron crassum from Dicrolene intronigra; Zoogonidae: Brachyenteron rissoanum n. sp. from Polyacanthonotus rissoanus, characterised by the ovary position, the saccular seminal vesicle, the marginal genital pore and egg-size; Koiea notacanthi n. g., n. sp. from Notacanthus (?) chemnitzi, characterised by the Y-shaped excretory vesicle and the posteriorly placed testes.
15 citations
TL;DR: The life cycle of Pygidiopsis crassus n.
Abstract: The life cycle of Pygidiopsis crassus n. sp. was experimentally reproduced, starting from cercariae from naturally infected Littoridina parchappei collected from Lujan River and different ponds in Buenos Aires Province, Argentina. Metacercariae were found encysted in the body cavity of experimentally and naturally infected fishes Cnesterodon decemmaculatus and naturally infected Jenynsia lineata. Adults were obtained experimentally in chicks and mice. The natural host is unknown. The new species is compared with Pygidiopsis macrostomum Travassos 1928, from Rattus norvegicus and from Noctilio leporinus mastivus, differing in body and egg sizes, in the size relation of oral and ventral sucker and the shape of excretory vesicle.
14 citations
TL;DR: It is suggested that the genus Occultacetabulum is synonymous with Steringophorus, and evidence is presented to show that the withdrawal of the ventral sucker into the body is a temporary condition.
Abstract: Steringophorus margolisi n.sp., described from the ophidiid Spectrunculus grandis, is distinguished by its elongate vitelline fields and long caeca. Steringophorus (=Occultacetabulum) dorsolineatum (Reimer, 1985) n.comb. is described from the chlorophthalmid Bathypterois dubius. It is suggested that the genus Occultacetabulum is synonymous with Steringophorus, and evidence is presented to show that the withdrawal of the ventral sucker into the body is a temporary condition. Steringophorus thulini Bray and Gibson, 1980 is partly redescribed from the macrourids Coryphaenoides (Chalinura) mediterraneus, C. (Chal.) brevibarbis, C. (Chal.) leptolepis, C. (Chal.) profundicolus, and Trachyrincus murrayi. Steringophorus blackeri Bray, 1973 is reported from the alepocephalid Xenodermichthys copei.
13 citations
12 citations
TL;DR: An extensive literature survey on metazoan parasites from rainbow trout Oncorhynchus mykiss has been conducted, finding a large number of parasites reflects its cosmopolitan distribution.
Abstract: An extensive literature survey on metazoan parasites from rainbow trout Oncorhynchus mykiss has been conducted. The taxa Monogenea, Cestoda, Digenea, Nematoda, Acanthocephala, Crustacea and Hirudinea are covered. A total of 169 taxonomic entities are recorded in rainbow trout worldwide although few of these may prove synonyms in future analyses of the parasite specimens. These records include Monogenea (15), Cestoda (27), Digenea (37), Nematoda (39), Acanthocephala (23), Crustacea (17), Mollusca (6) and Hirudinea (5). The large number of parasites in this salmonid reflects its cosmopolitan distribution.
11 citations
10 citations
01 Jan 1995
TL;DR: Comparative morphological study of 10 nominal species of pronocephalids forming a clade diagnosed by plump rounded bodies, sinuous ceca, and short esophagi supports the recognition of 7 species, with Pyelosomum longicaecum a junior synonym of P. renicapite, and P. solum and Myosaccus chelonei species incertae sedis suggested to be paraphyletic.
9 citations
TL;DR: Three new species of pelican are distinguishable through a combination of features: the possession and size of their ventral suckers; the Size of their oral suckers'; the relative development of their hindbodies; and the size of the eggs and cirrus-sacs.
Abstract: Mesostephanus scottae n. sp. is described from Phalacrocorax sulcirostris (little black cormorant) and P. varius (pied cormorant), and M. pelecani n. sp. is described from Pelecanus conspicillatus (Australian pelican), both from Queensland, Australia. The new species are distinguishable through a combination of features: the possession and size of their ventral suckers; the size of their oral suckers; the relative development of their hindbodies; and the size of their eggs and cirrus-sacs. M. haliasturis is recorded experimentally from Phalacrocorax sulcirostris and P. varius. Sporocysts, cercariae and metacercariae of M. haliasturis are described. Sporocysts produce daughter-sporocysts, cercariae and miracidia.
5 citations
Journal Article•
4 citations
Journal Article•
TL;DR: The trematode,Alloglossidium anomophagis sp.
Abstract: The trematode,Alloglossidium anomophagis sp. n. (Digenea: Plagiorchiidae) exhibits progenesis in water fleas of the genusDaphnia (Anomopoda: Daphniidae) occurring in temporary rainwater-filled ditches near Houston, Texas, USA. We assume thatA. anomophagis has achieved its truncated life cycle by eliminating the vertebrate which originally served as the definitive host. The adults ofA. anomophagis represent the smallest trematodes in the family Plagiorchiidae, measuring less than 0.5 mm in length.
01 Jan 1995
Journal Article•
Journal Article•
TL;DR: The intramolluscan stages of the human liver fluke Opisthorchis viverrini were investigated by light, scanning, and transmission electron microscopy and the morphology of the tegument, and the excretory system of the redia and pre-emergent cercaria as well as glandular cells, tail structure, andThe eye spots of the cercarial stage are described.
Abstract: The intramolluscan stages of the human liver fluke Opisthorchis viverrini were investigated by light, scanning, and transmission electron microscopy. The morphology of the tegument, and the excretory system of the redia and pre-emergent cercaria as well as glandular cells, tail structure, and the eye spots of the cercarial stage are described. Possible environmental adaptations are discussed. The redia is characterized by a tegument which is folded concentrically and covered with densely arranged microvilli. This tegument is composed of a typical syncytium with submerged tegumental cells. The pre-emergent cercaria is characterized by a long tail with prominent fin folds and obliquely striated muscles. The oral sucker is well developed and protrusible, whereas the ventral sucker is faintly developed. Proteinaceous tegumental spines which are arranged transversally and different kinds of presumed sensory structures cover the cercarial body surface. Two well pigmented eye spots with rhabdomeric photoreceptors are located in the anterior part of the body. An extended protonephridial system is connected to a voluminous excretory bladder. The excretory tube opens at the end of the body and does not lead into the tail. Three types of glandular cells could be differentiated according to their vesicles, which are shed into the syncytial layer.
TL;DR: Observations on living and preserved specimens fixed in copula indicate that the genital atrium functions as an eversible hermaphroditic organ bearing the male papillae and metraterm in L. deblocki.
Abstract: Levinseniella (Austromicrophallus) deblocki, n. sp., was collected during parasitologic studies of homeothermic vertebrates from salt marshes along the coast of the eastern Gulf of Mexico. Because L. deblocki lacks a femalepouch, it belongs to the subgenus Monarrhenosproposed by Deblock and Pearson (1970). However, since Deblock and Pearson did not explicitly designate a type species for Monarrhenos, it is not available and is a ” e n nudum. The next available name, Amtormicrophallus Szidat, 1964, a genus synonymized with Lminseniella Stiles andHassall, 1901 by Deblock (1978), is reinstatedas a subgenus toreceive the species lacking a female pouch and previously assigned to Monarrhenos. The adult of L. deblocki is found in the lower digestive tracts of the clapper rail (Rallus Zongirostris), rice rat (Oryzomys palustris), and raccoon (Procyon lotor). Morphologically, L. deblocki appears to be most similar to L. polydactyla Deblock and Rose, 1962, known from Europe, and L. ophidea (Nicol, Dameree, and Wootton, 1985), described from a freshwater habitat in California. Differences in the life cycle, habitat type, and geographic distribution, plus a combination of distinctive morphological characters (presence of lappets on the oral sucker, number of genital pockets, and body size) separate L. deblocki from the other members of the subgenus Austromicrophallus. The metacercarial stage of L. deblocki occurs in the gonads of fiddler crabs (Wca spp.) and the f is t intermediate host appears to be a hydrobud gastropod (Heleobops sp.). Observations on living and preserved specimens fixed in copula indicate that the genital atrium functions as an eversible hermaphroditic organ bearing the male papillae and metraterm. The genital hooks or “Jagerskiold’s bodies” appear to function as holdfast structures during copulation.
TL;DR: The new genus Melogonimus is defined and adults of its type-species, M. rhodanometra n.
Abstract: The new genus Melogonimus is defined and adults of its type-species, M. rhodanometra n. sp., are described from Rhina ancylostoma from Moreton Bay, Queensland. This is the first record of a digenean from this host species. It is argued that metacercariae from the portunid crab Portunus pelagicus from Hervey Bay, off Queensland, belong to M. rhodanometra. The definition of the family Ptychogonimidae is amended, and a key to its two genera is given. Melogonimus is characterised by a smooth genital atrium wall, a large sinus-organ, a large muscular seminal vesicle, a weakly developed pars prostatica, a pre-testicular uterus and confluent post-testicular vitelline fields.
01 Jan 1995
TL;DR: The helminth fauna in 1746 hosts, comprising 14 different species, which included almost all species of domestic and wild terrestrizl vertebrates from S. Miguel Island were studied, finding 77 species, most of them (65) were NEMATODA.
Abstract: The helminth fauna in 1746 hosts, comprising 14 different species, which included almost all species of domestic and wild terrestrizl vertebrates from S. Miguel Island. were studied. Of the classes NEMATODA, PLATYHELMINTHA and ACANTHOCEPHALA. 77 species were identified, most of them (65) were NEMATODA. PLATYHELMINTHA including CESTODA and DIGENEA are represented by 8 and 2 species, respectively. ACANTHOCEPHALA includes 2 species only. Excluding Fasciola hepatica L., 1758 and Srrongylus vulgaris (Looss, 1800), all the reported species are new records for the Azores Archipelago. The checklist is presented according to host and in alphabetical order. Frequency of occurrence and site within the host, as well as the localities where the host animal occurred, are presented.
TL;DR: Two species of the family Gorgoderidae (Trematoda: Digenea) were collected from the urinary bladder of frogs captured from various localities in Korea and the morphology of each species is described and illustrated.
Abstract: Two species of the family Gorgoderidae (Trematoda: Digenea), Gorgodera japonica Yamaguti, 1936 and Gorgoderina bombinae Yu & Lee, 1983 were collected from the urinary bladder of frogs captured from various localities in Korea. The morphology of each species is described and illustrated. Gorgodera japonica differs from G. cygnoides by having deeply branched vitellaria. Gorgoderina bombinae is considered a valid species.