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At least 289 records · Page 16Linked to original sources
PubMed2001

Metacestodes of the family Dilepididae (Cestoda: Cyclophyllidea) parasitising fishes in Mexico.

A survey of metacestodes of dilepidid tapeworms (Cyclophyllidea) occurring in fish from Mexico is presented. They belong to the following species (those first reported from Mexico marked with an asterisk): Cyclustera capito (Rudolphi, 1819); (*)Cyclustera cf. ralli (Underwood & Dronen, 1986); Dendrouterina pilherodiae Mahon, 1956; (*)Glossocercus auritus (Rudolphi, 1819); (*)G. caribaensis (Rysavy & Macko, 1973); (*)Paradilepis caballeroi Rysavy & Macko, 1973; (*)Paradilepis cf. urceus (Wedl, 1855); (*) Paradilepis sp.; Parvitaenia cochlearii Coil, 1955; (*)Parvitaenia macropeos (Wedl, 1855); (*)Valipora campylancristrota (Wedl, 1855); (*)V. mutabilis Linton, 1927; and (*)V. minuta (Coil, 1950). Metacestodes of Dendrouterina papillifera (Fuhrmann, 1908), previously reported from the gall-bladder of the pimelodid catfish Rhamdia guatemalensis from Mexico by Scholz et al. (1996), belong actually to V. minuta. Data on the morphology of metacestodes, their fish hosts and rate of infection, site and distribution in Mexico are provided.

Animals↗
PubMed2001

Grillotia australis n. sp. and G. pristiophori n. sp. (Cestoda: Trypanorhyncha) from Australian elasmobranch and teleost fishes.

Two new species of Grillotia are described from elasmobranch and teleost fishes from south-eastern Australia. G. australis n. sp., from the Australian angel shark Squatina australis. Regan, most closely resembles G. smarisgora (Wagener, 1854) and G. angeli Dollfus, 1969, differing from both species in the presence of smaller bulbs, two or occasionally three hooks in each intercalary row in the basal region, reduced to one in the metabasal region compared with four or five hooks in the metabasal region of G. smarisgora and a single hook in G. angeli, and in the limited extent of the band of hooklets on the external surface in the basal region of the tentacle, a region which is covered with hooks in G. smarisgora. Plerocerci of this species were found in the mackerel Trachurus declivis (Jenys) (site not known) from Tasmania. G. pristiophori n. sp., from the saw sharks Pristiophorus cirratus (Latham) and P. nudipinnis Günther, most closely resembles G. spinosissima Dollfus, 1969 in possessing a scolex covered with spiniform microtriches, but differs in having six rather than five hooks in each principal row, no intercalary hooks and by possessing a band of hooklets on the external surface of the tentacle which diminishes distally into a single file, rather than persisting as a band eight to nine files wide. G. pristiophori is the first trypanorhynch to be recorded from saw-sharks.

Animals↗
PubMed2001

Helicoductus thulakoceras n. g., n. sp. (Cestoda: Hymenolepididae) a parasite of Charadrius marginatus (Aves: Charadrii) from South Africa.

The authors describe and illustrate Helicoductus thulakoceras n. g., n. sp., a parasite of Charadrius marginatus (Aves: Charadrii) from South Africa. This hymenolepidid cestode is 1.5-3 mm long, with a rostellum armed with 10 diorchoid hooks 75-80 microm long (mean 77 microm) and anomalous terminal genital ducts. One spine (10-15 microm long) is inserted at the ventral extremity of the male genital pouch. An invaginated cirrus is absent. A non-retractable and non-invaginable external tube, 25-30 x 4-2.5 microm, appears as a spiral, sclerotinised, spinous canal, which is non-retractable, non-invaginable and directed dorso-ventrally from the genital pouch to a second ventral canal parallel with the male genital pouch; the second canal is thin and spine-like (15-20 x 1.5 microm) with a thick hyaline muff. These peculiar anatomical structures are discussed. They are considered to justify the erection of a new genus.

Animals↗
PubMed2001

Biogeography of helminth parasitism in Lemmus Link (Arvicolinae), with the description of Paranoplocephala fellmani n. sp. (Cestoda: Anoplocephalidae) from the Norwegian lemming L. lemmus (Linnaeus).

We describe the gastrointestinal helminth fauna of true lemmings (Lemmus spp., Arvicolinae) based on published and original material throughout the Holarctic range of these hosts. According to the existing data, the helminth fauna of true lemmings consists of three widespread and/or locally common taxa: Hymenolepis horrida (sensu lato) (Hymenolepididae), Anoplocephaloides lemmi (Anoplocephalidae) and Heligmosomoides spp. (Heligmosomidae). Despite the taxonomic boundaries and ancient phylogenetic splits in the hosts, there are no major faunistic differences for parasites within western (Siberian) L. sibiricus and L. bungei, and eastern (North American) L. trimucronatus throughout their distribution range. In contrast, the Norwegian lemming L. lemmus, which is a Fennoscandian endemic and closely related to the western populations of L. sibiricus, has only a single host-specific helminth, the cestode Paranoplocephala fellmani n. sp. (Anoplocephalidae). We describe the new species and show that it differs consistently from related species by its long and slender cirrus-sac. However, there are also a number of other significant differences, e.g., P. fellmani n. sp. and Andrya primordialis in Tamiasciurus hudsonicus (Sciuridae) evidently have a unique (sub)type of uterine development among Andrya/Paranoplocephala spp. Because P. fellmani n. sp. was also found to occur in Alaska (host L. trimucronatus), this species seems to follow the same biogeographical pattern as the other specialist helminths of Lemmus. We suggest alternative explanations for the absence of three major helminth taxa in the Norwegian lemming in Fennoscandia.

Animals↗
PubMed2001

Revision of the genus Parvirostrum Fuhrmann, 1908 (Cestoda: Cyclophyllidea: Paruterinidae).

Redescriptions are presented of the type-materials of Parvirostrum reticulatum Fuhrmann, 1908 (type-species of Parvirostrum Fuhrmann, 1908) from Lepidocolaptes albolineatus (Passeriformes: Dendrocolaptidae) and of P. synallaxis (Mahon, 1957) n. comb. (syn. Deltokeras synallaxis Mahon, 1957) from Synallaxis rutilans (Passeriformes: Furnariidae), both from Brazil. P. linusi n. sp. is described from Dendrocolaptes platyrostris (Dendrocolaptidae) from Paraguay. It is characterised by a strobila up to 29 mm long, 50-56 triangular rostellar hooks (13-15 microm long) in two regular rows, irregularly-alternating genital pores, the variable position of the genital ducts relative to the osmoregulatory canals, 11-17 testes, a cirrus-sac 104-129 microm long, a cirrus armed with minute spines, elongate gravid proglottides and a uterine development which initially passes through a sac-like stage, followed by a sac-like stage with diverticula and finally through a reticulate stage. An incomplete description of Parvirostrum sp., based on contracted specimens from Lepidocolaptes angustirostris from Paraguay, is presented. The diagnosis of Parvirostrum is amended.

Animals↗
PubMed2001

Echinobothrium chisholmae n. sp. (Cestoda, Diphyllidea) from the giant shovel-nose ray Rhinobatos typus from Australia, with observations on the ultrastructure of its scolex musculature and peduncular spines.

Echinobothrium chisholmae n. sp. is described from Rhinobatos typus Bennett (Rhinobatidae), collected from Heron Island, Great Barrier Reef, Australia. E. chisholmae differs from all congeners in possessing 11 hooks in each dorsal and ventral group on the rostellum and groups of 3-6 hooklets on either side of the hooks. A single metacestode of E. chisholmae was collected from the decapod crustacean Penaeus longistylus Kubo. Yellow pigmentation of the cephalic peduncle in immature adults is caused by the accumulation of large vesicles in the distal cytoplasm of the tegument. The vesicles probably provide materials for spine formation. Ultrastructural examination of the rostellar musculature revealed that the muscles are stratified (striated-like), consisting of a periodic repetition of sarcomeres separated by perforated Z-like lines that are oblique to the long axes of the myofilaments.

Animals↗
PubMed2001

Comparative karyological studies on the species of Eubothrium Nybelin, 1922 (Cestoda: Pseudophyllidea).

Karyotypes of Eubothrium salvelini, E. crassum and Eubothrium sp. were studied using conventional Giemsa staining and comparative karyometric analysis. The karyotypes, reported here for the first time, consist of eight chromosome pairs. The two first pairs of homologues are metacentric and markedly larger than the remaining elements. The obvious similarity in karyotype structure does not exclude the possibility of discriminating E. salvelini and E. crassum using karyotypic characters. The best cytogenetic marker is the last pair of chromosomes, which is acrocentric in the karyotype of E. salvelini and metacentric in that of E. crassum. Karyological observations provide strong evidence for assigning Eubothrium sp. from Clupea harengus membras to E. crassum. Comments are made on the karyotypes of these and related species with respect to their phylogenetic links.

Animals↗
PubMed2001

Probothriocephalus alaini n. sp. (Cestoda: Triaenophoridae) from the deep-sea fish Xenodermichthys copei in the North Atlantic Ocean.

Probothriocephalus alaini n. sp. is described from the intestine of the deep-sea fish Xenodermichthys copei (Gill) (Osmeriformes: Alepocephalidae) from the North Atlantic. It resembles most closely the type-species of Probothriocephalus, P. muelleri Campbell, 1977 described from Alepocephalus agassizi Goode & Bean (Alepocephalidae), but it differs in the distribution of the vitelline follicles that form two medially well-separated bands (versus almost circum-cortical in P. muelleri), in the shape of gravid proglottids that are elongate, much longer than wide (always wider than long in P. muelleri), in the size of the body (much larger in the latter species) and a somewhat different shape of the scolex (widely lanceolate versus elongate and tapering anteriorly in P. muelleri). Other congeneric species, described from deep-sea fish of different orders (Myctophiformes and Beryciformes), lack a distinct neck region, their eggs were reported to be non-operculate and they have much more pronounced external segmentation.

Animals↗
PubMed2002

A description of Cinclotaenia georgievi n. sp. (Cestoda: Dilepididae), a tapeworm from the dipper Cinclus cinclus (L.) (Passeriformes: Cinclidae).

Cinclotaenia sp., described originally by Georgiev & Genov (1985) from the dipper Cinclus cinclus (L.) in Bulgaria, has recently been identified from the same host in the Carpathian Mountains in the Slovak Republic. This tapeworm is considered to be a new species, which is named C. georgievi n. sp. It is characterised by: a scolex armed with 23-27 (predominantly 24-26) hooks in two rows; hooks 30.5-36 microm long, with a blade 10-13.5 microm long and resembling in shape the diorchoid hooks of hymenolepidids; irregularly alternating genital pores with simple genital atria; a slightly conical cirrus armed by small spines of up to 3 microm in length; 24-51 testes posterior to a bi-alate, branched ovary; a gravid uterus filled with egg packets; and eggs with filaments. C. georgievi n. sp. differs from the closely-related C. tarnogradskii (Dinnik, 1927) in the slightly higher number of rostellar hooks, which have longer blades, and a larger cirrus.

Animals↗
PubMed2002

Cestodes of the family Dilepididae (Cestoda:Cyclophyllidea) from fish-eating birds in Mexico: a survey of species.

A survey of adults of dilepidid tapeworms (Cyclophyllidea) from piscivorous birds from Mexico is presented on the basis of the taxonomic evaluation of freshly collected and voucher specimens. The following species are reported (first records from Mexico marked with an asterisk): Cyclustera capito (Rudolphi, 1819); *C. ibisae (Schmidt & Bush, 1972); *Dendrouterina ardeae Rausch, 1955; *D. herodiae Fuhrmann, 1912; *D. papillifera (Fuhrmann, 1908); Glossocercus auritus (Rudolphi, 1819); *Neogryporhynchus cheilancristrotus (Wedl, 1855); Paradilepis caballeroi Rysavy & Macko, 1973; Paradilepis sp.; Parvitaenia cochlearii Coil, 1955; and Valipora mutabilis Linton, 1927. Dendrouteria herodiae is reported from America for the first time. New definitive hosts are Phalacrocorax olivaceus for C. capito, N. cheilancristrotus and P. caballeroi; Casmerodius albus and Egretta thula for G. auritus; and E. thula for D. herodiae. Data on the morphology of the rostellar hooks of all species, their hosts and distribution in Mexico are provided.

Animals↗
PubMed2002

Molecular variation of Bothriocephalus acheilognathi Yamaguti, 1934 (Cestoda: Pseudophyllidea) in different fish host species based on ITS rDNA sequences.

The molecular variation in Bothriocephalus acheilognathi Yamaguti, 1934 from 11 species of freshwater fish collected in Australia, China, the Czech Republic, England and Hawaii was investigated by determining the nucleotide sequences of the internal transcribed spacer region. The length of the first and second internal transcribed spacer sequences of multiple individuals ranged from 553 to 571 bp and 553 to 615 bp, and the G + C content from 53.1 to 53.5%. The percentage sequence divergence varied between 0 and 0.9% in the ITS1 and 0 and 6.6% in the ITS2, respectively, indicating the occurrence of intraspecific variation. It is demonstrated that the fragment length variation resulted primarily from microsatellite polymorphisms present in the ITS region, especially in the ITS2 region. Phylogenetic analyses revealed that B. acheilognathi examined in this study consisted of three closely related genotypes with certain degrees of host-specificity, and the genotype representing isolates from Cyprinus carpio L. was the most common and diverse form within the species B. acheilognathi.

Animals↗
PubMed2002

A revision of Microbothriorhynchus Yamaguti, 1952 (Cestoda: Trypanorhyncha), with the redescription of M coelorhynchi Yamaguti, 1952 and the description of M reimeri n sp.

The genus Microbothriorhynchus Yamaguti, 1952 is revised. Plerocerci of M. coelorhynchi Yamaguti, 1952 from the body-cavity of Brotula barbata (Bloch & Schneider) off the Angolan coast are re-described, and M. reimeri n. sp. from the body-cavity of Helicolenus maculatus (Cuvier) and Caelorinchus parallelus (Günther) from coastal waters off Mozambique is added to the genus. Both species are characterised in having an elongated, slightly craspedote scolex with small, collar-like bothridia, an elongate pars vaginalis and very long bulbs. The tentacular armature is heteroacanthous atypica, with eight principal hooks and intercalary hooks merging with a band of spiniform hooks on the external tentacle surface. The adult is unknown. Microbothriorhynchus is allocated to the Lacistorhynchidae Guiart, 1927, in having a blastocyst, two bothridia and a heteroacanthous atypica armature. Dasyrhynchus Pintner, 1928 and Pseudogrillotia Dollfus, 1969 are considered the most closely related genera, sharing characters such as the craspedote scolex, similar scolex proportions and hook patterns. Microbothriorhynchus appears to link the heteroacanthous atypica genera Grillotia Guiart, 1927 and Pseudogrillotia with the poeciloacanthous genus Dasyrhynchus.

Angola↗
PubMed2003

Bothriocephalus gadellus n. sp. (Cestoda: Bothriocephalidae) from the beardless codling Gadella imberbis (Vaillant) (Moridae) in the southwestern Gulf of Mexico, with a review of species of Bothriocephalus Rudolphi, 1808 reported from gadiform fishes.

Bothriocephalus gadellus n. sp. is described from the intestine of the beardless codling Gadella imberbis (Gadiformes: Moridae) from the southwestern Gulf of Mexico. It resembles B. scorpii, the type-species of Bothriocephalus, and B. manubriformis, the only species of the genus reported from the Gulf of Mexico. B. gadellus n. sp. differs from both species in having four excretory canals on each side of the proglottid (three per side in B. scorpii; two per side anastomosing to form an extensive plexus throughout the medulla in B. manubriformis ), 24-33 testes per proglottid (30-60 in B. scorpii; 60-100 in B. manubriformis), a total length of 31-47 mm (32-950 mm in B. scorpii; 130-1,000 mm in B. manubriformis), and a seminal receptacle and wing-like expansions on each proglottid (absent in B. scorpii and B. manubriformis), as well as lacking two sets of reproductive organs per proglottid (present in B. scorpii) and a vagina with a bulbous sphincter near the opening (present in B. manubriformis). An amendment to the generic diagnosis of Bothriocephalus might be warranted if other species of this genus are found to possess a seminal receptacle. B. gadellus n. sp. appears to be like those species of Bothriocephalus that can utilise two intermediate hosts (copepod and fish). B. ellipticus and B. neglectus are designated as species inquirendae. This is the first report of a cestode from a morid fish in the Gulf of Mexico, and the first report of a parasite from a species of Gadellus.

Animals↗
PubMed2003

What is Paranoplocephala macrocephala (Douthitt, 1915) (Cestoda: Anoplocephalidae)?

We present a redescription for Paranoplocephala macrocephala (Douthitt, 1915) in the type host, Geomys bursarius (Shaw) (hereafter PMG), and compare it with a P. macrocephala-like taxon in Microtus pennsylvanicus (Ord) (hereafter PMM) and P. kalelai (Tenora, Haukisalmi & Henttonen, 1985) in Clethrionomys rufocanus (Sundevall) using uni- and multivariate (discriminant analysis) morphometric methods. P. kalelai was found to be most divergent among these three taxa using both uni- and multivariate analyses, supporting its status as an independent species. Most of the observed metrical differences between PMG and PMM were found to reflect the larger body size of PMM; the relative size of organs (ratios) did not usually differ significantly between these taxa. The length/width ratio of mature segments was found to be the only size-independent feature that reliably separates PMG and PMM. Since PMM and PMG are also qualitatively very similar, e.g. with respect to the distribution of testes and morphology of the terminal genital ducts, the present analysis could not provide conclusive evidence against their conspecificity. However, the morphological variability and wide host and geographical distribution of P. macrocephala-like cestodes in North American voles of the genus Microtus, and the patterns of host-specificity within Paranoplocephala, suggest that this complex probably includes several species.

Alaska↗
PubMed2003

Viscachataenia n. g., with the redescription of V. quadrata (von Linstow, 1904) n. comb. (Cestoda: Anoplocephalidae) in Lagidium viscacia (Rodentia: Chinchillidae) from Argentina.

A new genus, Viscachataenia, is erected to accommodate the anoplocephalid cestode Cittotaenia quadrata von Linstow, 1904, based on a redescription of the species from material collected from the chinchillid rodent Lagidium viscacia in Argentina. The new genus is characterised by paired genitalia, a reticulate uterus and the vagina entering the genital atrium anterior to the cirrus-sac. Viscachataenia therefore has similarities with Monoecocestus Beddard, 1914, a genus which is common in South American rodents but which has a single set of genitalia in each segment. Cittotaenia viscaciae (Spasskii, 1951) and Bertiella findlayi Mazza, Parodi & Fiora, 1932, also from viscachas, are considered synonyms of V. quadrata.

Animals↗
PubMed2003

Taxonomic revision of Tatria Kowalewski, 1904 (Cestoda: Amabiliidae): redescriptions of T. biremis Kowalewski, 1904 and T. minor Kowalewski, 1904, and the description of T. gulyaevi n. sp. from Palaearctic grebes.

Two species of Tatria Kowalewski, 1904 are redescribed from grebes in Bulgaria: T. biremis Kowalewski, 1904 (specimens from Podiceps nigricollis) and T. minor Kowalewski, 1904 (specimens from P. cristatus and P. nigricollis). T. mircia Gulyaev, 1990 is synonymised with T. minor. The previous records of T. biremis, T. minor and T. mircia are critically analysed in view of the present results. T. gulyaevi n. sp. is described from P. nigricollis from Bulgaria and the Czech Republic and from an unidentified grebe species from Turkey. Some of the previous records of T. minor and T. biremis are recognised as belonging to T. gulyaevi. One specimen illustrated by Kowalewski (1904) is designated as a lectotype of T. minor in order to stabilise the nomenclatural standing of this species.

Animals↗
PubMed2003

Cysticercoids of five species of Raillietina Fuhrmann, 1920 (Cestoda: Davaineidae) in ants, Pheidole sp., from emu farms in Australia.

Cysticercoids of five species of Raillietina, R. australis (Krabbe, 1869) Fuhrmann, 1924, R. beveridgei O'Callaghan, Davies & Andrews, 2000, R. chiltoni O'Callaghan, Davies & Andrews, 2000, R. dromaius O'Callaghan, Davies & Andrews, 2000 and R. mitchelli O'Callaghan, Davies & Andrews, 2000, parasitic in the emu Dromaius novaehollandiae Latham, are described. Each species was identified on the basis of the number and size of the rostellar hooks, which correspond to those of adult worms. Cysticercoids were recovered from the haemocoele of the gaster of ants belonging to the genus Pheidole (Hymenoptera: Formicidae) in Australia. There was a trend towards an inverse relationship between the size of the cysticercoids and the parasite burden in the intermediate host.

Animals↗
PubMed2003

Taxonomic revision of Tatria Kowalewski, 1904 (Cestoda: Amabiliidae): redescriptions of T. appendiculata Fuhrmann, 1908 and T. duodecacantha Olsen, 1939, a key and an amended diagnosis of Tatria (sensu stricto).

Tatria appendiculata Fuhrmann, 1908 is redescribed on the basis of syntypes from Tachybaptus dominicus in Brazil and voucher specimens from the same host species in Cuba previously recorded by Rysavy & Macko (1971). Paratypes of T. duodecacantha Olsen, 1939 from Podilymbus podiceps in the USA are also redescribed and, in contrast with the opinion of Ryzhikov & Tolkacheva (1981), the species is recognised as valid. The major reliable diagnostic characters of Tatria and the distinguishing criteria applicable at the species level are re-evaluated. An amended generic diagnosis of Tatria (sensu stricto) and an identification key to its constituent species are presented.

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