Open Access. Powered by Scholars. Published by Universities.®

Parasitology Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1531 - 1560 of 2461

Full-Text Articles in Parasitology

Developmental Niche Structure In The Gregarine Assemblage Parasitizing Tenebrio Molitor, Richard E. Clopton, John J. Janovy Jr. Oct 1993

Developmental Niche Structure In The Gregarine Assemblage Parasitizing Tenebrio Molitor, Richard E. Clopton, John J. Janovy Jr.

John J. Janovy, Jr. Publications

The exogenous developmental niche spaces of Gregarina cuneata and Gregarina polymorpha, parasites restricted to larval Tenebrio molitor, and Gregarina niphandrodes, a parasite restricted to adult T. molitor, were determined along temperature and humidity axes and associated with parasite niche space on the host resource axis. Gregarine gametocysts were incubated at controlled humidity (0, 10, and 20 mm Hg vapor pressure deficit) at 20, 25, 30, and 35 C to determine the environmental limits to survival and sporulation. Although the environmental conditions that permit gametocyst development overlap, the gregarine parasite restricted to adult T. molitor utilizes a …

Go to article

Analysis Of Black Point In Wheat, J M. Wilson Oct 1993

Analysis Of Black Point In Wheat, J M. Wilson

Technical Bulletins

Fungal staining (black point) of wheat can reduce the quality of grain. The most serious problem is a discolouration of products. Discolouration is a consequence of infection by microorganisms. The most likely cause in Western Australia is a species of the common fungus Alternaria. Infection and discolouration occur between flowering and grain maturity, and the optimum environmental conditions are probably consecutive days of high relative humidity together with warm temperatures.

Go to article

Patterns Of Morphological Variation Of Salsuginus Yutanensis (Monogenea: Ancyrocephalidae) Over Space And Time, Michael T. Ferdig, Mary Ann Mcdowell, John J. Janovy Jr., Richard E. Clopton Oct 1993

Patterns Of Morphological Variation Of Salsuginus Yutanensis (Monogenea: Ancyrocephalidae) Over Space And Time, Michael T. Ferdig, Mary Ann Mcdowell, John J. Janovy Jr., Richard E. Clopton

John J. Janovy, Jr. Publications

Salsuginus yutanensis occurs on the gills of the Plains topminnow Fundulus sciadicus Cope. The fish of this species have been found to vary morphologically and biochemically among disjunct populations. Morphological characteristics of the sclerotized parts of S. yutanensis were examined from three localities in Nebraska, over a 2-yr collecting period. Analysis of variance was used to assess morphological variation with respect to site and date. Worms from two localities, Keith and Saunders counties, differed significantly for most characters considered. A third site, also in Keith County, contained worms for which measurement means tended to be intermediate between those in the …

Go to article

Host Specificity Of Calyptospora Funduli (Apicomplexa: Calyptosporidae) In Atheriniform Fishes, John W. Fournie, Robin M. Overstreet Oct 1993

Host Specificity Of Calyptospora Funduli (Apicomplexa: Calyptosporidae) In Atheriniform Fishes, John W. Fournie, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Calyptospora funduli has a broad host specificity, infecting at least 7 natural and 10 additional experimental definitive hosts, all atheriniform fishes within 5 families, but most in the genus Fundulus. Barriers, apparently innate ones, prevent any development of C. funduli in perciform fishes but allow incomplete or abnormal development of the parasite in a few unnatural atheriniform hosts. In the freshwater species Fundulus olivaceus and Fundulus notti, these abnormalities consisted of asynchronous development, degeneration of the parasite in early stages of development, and the formation of numerous macrophage aggregates. Rivulus marmoratus has the ability to eliminate infections with …

Go to article

Review Of Practical Taxonomic Computing By Richard J. Pankhurst (Cambridge University, 1991), Daniel R. Brooks Sep 1993

Review Of Practical Taxonomic Computing By Richard J. Pankhurst (Cambridge University, 1991), Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Review of Practical Taxonomic Computing by Richard J. Pankhurst (Cambridge University, 1991).

Go to article

Some Platyhelminths Inhabiting White-Throated Sparrows, Zonotrichia Albicollis (Aves: Emberizidae: Emberizinae), From Algonquin Park, Ontario, Canada, Daniel R. Brooks, Eric P. Hoberg, Anne Houtman Aug 1993

Some Platyhelminths Inhabiting White-Throated Sparrows, Zonotrichia Albicollis (Aves: Emberizidae: Emberizinae), From Algonquin Park, Ontario, Canada, Daniel R. Brooks, Eric P. Hoberg, Anne Houtman

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Twenty-two of 26 white-throated sparrows, Zonotrichia albicollis, from Algonquin Park, Ontario, Canada, hosted one or two species of platyhelminths. One species of cestode and three of digeneans were collected. Anonchotaenia quiscali inhabited 50% of the sparrows. This is the third report of A. quiscali; Z. albicollis is a new host. Brachylecithum nanum inhabited 43%, Zonorchis alveyi 15%, and Prosthogonimus macrorchis 8% of the sparrows examined. Ontario is a new geographic distribution record for all four parasite species. The proportion of hosts infected with two species was not significantly different from expected based on single species prevalences, indicating that …

Go to article

Nubenocephalus Nebraskensis N. Gen., N. Sp. (Apicomplexa: Actinocephalidae) From Adults Of Argia Bipunctulata (Odonata: Zygoptera), Richard E. Clopton, Tamara J. Percival Cook, John J. Janovy Jr. Aug 1993

Nubenocephalus Nebraskensis N. Gen., N. Sp. (Apicomplexa: Actinocephalidae) From Adults Of Argia Bipunctulata (Odonata: Zygoptera), Richard E. Clopton, Tamara J. Percival Cook, John J. Janovy Jr.

John J. Janovy, Jr. Publications

Nubenocephalus nebraskensis n. gen., n. sp. (Apicomplexa: Actinocephalidae) is described from trophozoites, sporonts, gamonts, and oocysts collected from adult Argia bipunctulata (Odonata: Zygoptera). The new genus is distinguished from existing acanthosporine genera by elongate dodecahedral oocysts, without equatorial faces, that are hexagonal in equatorial cross section with equatorial and terminal spines. The epimerite is very broadly ovoid and truncated posteriorly with equatorial lobiform tumidi that are posteriorly bilobate and do not form hooks, spines, or digitiform processes. The epimerite is borne on a long, slender stalk. The new species is also reported from naiads ofArgia bipunctulata and adults and naiads …

Go to article

Extending The Symbiotype Concept To Host Voucher Specimens, Daniel R. Brooks Aug 1993

Extending The Symbiotype Concept To Host Voucher Specimens, Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Recently, Frey, Yates, Duszynski, Gannon, and Gardner (1992) suggested that parasitologists deposit specimens of hosts from which type specimens of new parasite species are collected. Their proposal was directed especially at systematic and evolutionary biologists. Frey et al. (1992) pointed out that, whether one emphasizes microevolutionary (e.g., Price, 1980) or macroevolutionary (e.g., Brooks and Mc- Lennan, 1993) aspects of parasite evolutionary biology, much of the context of evolution involves hosts. Robust estimates of the selective effects and the patterns of diversification of host associations require the best possible estimates of the host species involved. This is …

Go to article

The Niche Of The Gill Parasite Dactylogyrus Banghami (Monogenea: Dactylogyridae) On Notropis Stramineus (Pisces: Cyprinidae), Jill A. Anderson, Kimberly J. Blazek, Tamara J. Percival Cook, John J. Janovy Jr. Jun 1993

The Niche Of The Gill Parasite Dactylogyrus Banghami (Monogenea: Dactylogyridae) On Notropis Stramineus (Pisces: Cyprinidae), Jill A. Anderson, Kimberly J. Blazek, Tamara J. Percival Cook, John J. Janovy Jr.

John J. Janovy, Jr. Publications

Distribution of the monogenean Dactylogyrus banghami on the gills of the fish Notropis stramineus (Cyprinidae) was described by calculation of mean relative positions and Levins' niche breadths on the linear spatial resource gradients gill filament length and gill arch length. Thirty fish with 276 worms were examined; only one of the fish had an additional gill parasite species (Trichodina sp). Worms were more broadly and evenly distributed across the length of the gill arch than they were on the filament (breadths of 0.91 and 0.67, respectively). Mean worm positions were near the center of both resources: 54% of the …

Go to article

Lagarocotyle Salamandrae N. Gen., N. Sp. (Monogenoidea, Polyonchoinea, Lagarocotylidae N. Ord.) From The Cloaca Of Rhyacotriton Cascadae Good And Wake (Caudata, Rhyacotritonidae) In Washington State, Delane C. Kritsky, Eric P. Hoberg, K. B. Aubry Jun 1993

Lagarocotyle Salamandrae N. Gen., N. Sp. (Monogenoidea, Polyonchoinea, Lagarocotylidae N. Ord.) From The Cloaca Of Rhyacotriton Cascadae Good And Wake (Caudata, Rhyacotritonidae) In Washington State, Delane C. Kritsky, Eric P. Hoberg, K. B. Aubry

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Lagarocotyle salamandrae n. gen., n. sp. (Lagarocotylidea n. ord., Lagarocotylidae n. fam.) is described from the cloaca of the Cascade torrent salamander, Rhyacotriton cascadae Good and Wake (Rhyacotritonidae), from the Lewis River and Wind River drainages of south-central Washington. Lagarocotyle n. gen. is characterized, in part, by a haptor armed with 16 hooks (14 submarginal, two subcentral), blind intestinal ceca, a large testis surrounding the germarium, an open male copulatory organ (not tubular), a dextroventral vaginal pore (at level of copulatory complex), and an egg lacking filaments; eyes, head organs, seminal receptacle, and haptoral anchors and bars are lacking. Lagarocotyle …

Go to article

The Phylogenetic Component Of Cooperative Breeding In Perching Birds: A Commentary, Deborah A. Mclennan, Daniel R. Brooks May 1993

The Phylogenetic Component Of Cooperative Breeding In Perching Birds: A Commentary, Deborah A. Mclennan, Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The study of behavioral and ecological evolution within a phylogenetic context (historical ecology; Brooks and McLennan 1991) is an important component of comparative studies in evolutionary biology. Although the number of historical ecological studies is growing rapidly, this research field is still in its infancy--an infancy whose maturation is hampered by the absence of rigorous phylogenetic hypotheses for many of the groups that have traditionally fascinated behavioral ecologists. In the absence of such critical information, behavioral ecologists are faced with the options either of forming cooperative groups with phylogenetic systematists or of investigating their ecological data based on "trees" reconstructed …

Go to article

Coccidia (Apicomplexa), Genetic Diversity, And Environmental Unpredictability Of Four Chromosomal Species Of The Subterranean Superspecies Spalax Ehrenbergi (Mole-Rat) In Israel, Lee Couch, Donald W. Duszynski, Eviatar Nevo Apr 1993

Coccidia (Apicomplexa), Genetic Diversity, And Environmental Unpredictability Of Four Chromosomal Species Of The Subterranean Superspecies Spalax Ehrenbergi (Mole-Rat) In Israel, Lee Couch, Donald W. Duszynski, Eviatar Nevo

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Forty-five mole-rats, representing 4 chromosomal species (2n = 52, 54, 58, 60) of the superspecies Spalax ehrenbergi. were collected from 12 localities in Israel in 4 distinct climatic regions. Feces were examined for coccidian oocysts and 41 (91 %) were infected; 26 (63%) had multiple infections of up to 5 coccidian species, 4 of which are described here as new species. Sporulated oocysts of Eimeria anzanensis n. sp. were ellipsoidal 18.3 x 12.5 μm (14-22 x 10-16) and had elongate-ovoidal sporocysts 7.3 x 4.9 μm (5-10 x 3-7); it occurred in 39 of 45 (87%) mole-rats, including all chromosomal …

Go to article

Management Of University Biological Collections: A Framework For Policy And Practice, Patrick E. Mcguire, Lynn S. Kimsey, Scott Lyell Gardner Mar 1993

Management Of University Biological Collections: A Framework For Policy And Practice, Patrick E. Mcguire, Lynn S. Kimsey, Scott Lyell Gardner

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A broad-based task force, chaired by Lynn Kimsey of the Department of Entomology and director of the Bohart Entomological Museum, was convened to review and assess the status of living and preserved biological collections held on the Davis campus of the University of California. The task force addressed three basic issues, forming subcommittees to 1) review the data gathered in a survey by the Genetic Resources Conservation Program of living and preserved collections and report its findings, 2) make recommendations for policy guidelines on a campus basis and an individual-collection basis, and s) propose a campus-wide administrative structure to address …

Go to article

Spiculopteragia Spiculoptera And S. Asymmetrica (Nematoda: Trichostrongyloidea) From Red Deer (Cervus Elaphus) In Texas, Lora G. Rickard, Eric P. Hoberg, Nancy M. Allen, Gary L. Zimmerman, Thomas M. Craig Jan 1993

Spiculopteragia Spiculoptera And S. Asymmetrica (Nematoda: Trichostrongyloidea) From Red Deer (Cervus Elaphus) In Texas, Lora G. Rickard, Eric P. Hoberg, Nancy M. Allen, Gary L. Zimmerman, Thomas M. Craig

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Specimens of Spiculopteragia spiculoptera and S. asymmetrica were recovered from the abomasa of five of ten naturally infected red deer (Cervus elaphus) in Texas (USA). Female specimens of Spiculopteragia were present in all five animals. Male specimens of S. spiculoptera and S. asymmetrica were present in one of five and three of five red deer, respectively. Spiculopteragia spiculoptera has not previously been recognized in the United States and the present report constitutes the first records of Spiculopteragia spp. in red deer from North America. It is likely that species of Spiculopteragia have been introduced to North America with …

Go to article

Enteric Coccidia (Apicomplexa) In The Small Intestine Of The Northern Spotted Owl (Strix Occidentalis Caurina), Eric P. Hoberg, R. J. Cawthorn, O. R. Hedstrom Jan 1993

Enteric Coccidia (Apicomplexa) In The Small Intestine Of The Northern Spotted Owl (Strix Occidentalis Caurina), Eric P. Hoberg, R. J. Cawthorn, O. R. Hedstrom

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Sporulated oocysts (mean dimensions = 13.0 x 10.8 μm) and sporocysts (11.3 x 5.5 μm) of a coccidian resembling Frenkelia sp. or Sarcocystis sp. were present in the lamina propria of the small intestine of a naturally-infected northern spotted owl (Strix occidentalis caurina) collected near Medford, Oregon, USA. Dimensions of these oocysts and sporocysts appear to be considerably smaller than those from other sarcocystid species with avian definitive hosts. Additionally, numerous developmental stages and unsporulated oocysts (mean dimensions 22.8 x 17.8 μm) of a possible species of Isospora also were observed in the intestinal epithelium. This constitutes the …

Go to article

Book Review Of Parascript: Parasites And The Language Of Evolution By D. R. Brooks And D. A. Mclennan, Smithsonian Institution Press, Washington, D.C., 1993., Eric P. Hoberg Jan 1993

Book Review Of Parascript: Parasites And The Language Of Evolution By D. R. Brooks And D. A. Mclennan, Smithsonian Institution Press, Washington, D.C., 1993., Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Review of Parascript: Parasites and the Language of Evolution by Daniel R. Brooks and Deborah A. McLennan, with bibliographical references.

Go to article

Charles Eric "Chuck" Dawson, 1922-1993 [In Memoriam], Robin M. Overstreet, Stuart G. Poss Jan 1993

Charles Eric "Chuck" Dawson, 1922-1993 [In Memoriam], Robin M. Overstreet, Stuart G. Poss

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Obituary of Charles Eric "Chuck" Dawson, 1922-1993, American marine ichthyologist.

Go to article

Three New Species Of Nematodes Associated With Endemic Grape (Vitis) In California, Luma Al-Banna, Scott Lyell Gardner Jan 1993

Three New Species Of Nematodes Associated With Endemic Grape (Vitis) In California, Luma Al-Banna, Scott Lyell Gardner

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Three new species of nematodes were encountered during a study of natural diversity of nematode associates of native species of Vitis L. in California. Achromadora walkeri sp. n. was found in rhizosoil of the native California grape Vitis californica Bentham and is characterized by the position of the amphid (within the vicinity of both dorsal and ventral teeth), a relatively long stoma, and the absence of a prerectum. The other 2 species were plant parasitic criconematids: Criconemoides featherensis sp. n., found in association with roots of V. californica, is characterized by possessing strongly retrose annuli posterior to the vulva, …

Go to article

Dynamics Of The Arctic Fox Population On St. Lawrence Island, Bering Sea, Francis H. Fay, Robert L. Rausch Dec 1992

Dynamics Of The Arctic Fox Population On St. Lawrence Island, Bering Sea, Francis H. Fay, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

English abstract: We hypothesized that the arctic fox, Alopex lagopus (Linnaeus), population on St. Lawrence Island was cyclic and that its fluctuations in size. structure, and productivity were correlated with the relative size of the population of northern voles, Microtus oeconomus Pallas, the primary prey. Based on a nine-year study, we determined that the variations in size of the fox and vole populations were similar, but they both were of low amplitude and not closely correlated. The high pregnancy rate (mean, 86%/yr) and numbers of young conceived (mean, 11.5/pregnancy) did not vary significantly among years, probably because of the consistently …

Go to article

Profile: Gerald D. Schmidt (1934-1990), Scott Lyell Gardner, John E. Ubelaker Nov 1992

Profile: Gerald D. Schmidt (1934-1990), Scott Lyell Gardner, John E. Ubelaker

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Gerald D. Schmidt was born March 12, 1934 in Greeley, Colorado. After finishing his undergraduate degree in Biology at Colorado College in Greeley (now the University of Northern Colorado) Dr. Schmidt went on to receive his masters degree from Colorado State University (CSU) in 1962 and his PhD in 1964 also from CSU. While At CSU he worked under Dr. O. W. Olsen, first on the helminth parasites of the common snipe, and then, for his doctorate, he studied the embryological development of the Acanthocephala. He became a member of the faculty of UNC in Greeley In 1966. His collaboration …

Go to article

Dynamics Of The Parasite Assemblage Of Pimephales Promelas In Nebraska, Mary Ann Mcdowell, Michael T. Ferdig, John J. Janovy Jr. Oct 1992

Dynamics Of The Parasite Assemblage Of Pimephales Promelas In Nebraska, Mary Ann Mcdowell, Michael T. Ferdig, John J. Janovy Jr.

John J. Janovy, Jr. Publications

Present theory states that in species-poor assemblages interactions among species are negligible and assemblage structure is a result of host/parasite interactions. A corollary to this theory is that parasite species assemblages should behave as accumulations of multiple-kind items drawn from a population in which only the relative probability of drawing each kind varies. This study was designed to test this prediction by comparing descriptor values, including diversity indices, species density values, equitability, and prevalence to those obtained from data produced by a Monte Carlo simulation model. The parasite assemblage consisted of 7 parasite species or types found in the fathead …

Go to article

Larids, Scolopacids, And Passerines Exploiting Ephemeral Prey At Talan Island, Russia, Eric P. Hoberg, Alexander I. Kondratiev, Alexander S. Kitaysky Oct 1992

Larids, Scolopacids, And Passerines Exploiting Ephemeral Prey At Talan Island, Russia, Eric P. Hoberg, Alexander I. Kondratiev, Alexander S. Kitaysky

Harold W. Manter Laboratory of Parasitology: Faculty Publications

We report an unusual multispecies foraging assemblage that included larids, shorebirds and passerines which exploited a highly concentrated and ephemeral prey source over a period of three days in July and August 1988. During studies of breeding biology, food-habits and host-parasite ecology among a diverse colonial avifauna at Talan Island in the northern Sea of Okhotsk (59°18'N; 149°02'E) we observed the formation of mixed-species flocks during extreme high tides of July 31, August 1, and August 13, 1988.

Go to article

The U.S. National Parasite Collection--A Century Of Service, J. Ralph Lichtenfels, P. A. Pilitt, Eric P. Hoberg Oct 1992

The U.S. National Parasite Collection--A Century Of Service, J. Ralph Lichtenfels, P. A. Pilitt, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The U.S. National Parasite Collection will complete its first century of service to the field of animal parasitology in 1992. A brief history of the collection and a description of current policies on deposit and loan of specimens are provided. The collection, started in 1892 by Charles Wardell Stiles and Albert Hassall, now includes several constituent collections: The USNM Helminthological Collection, The USDA Parasite Collection, The Hoffman-Bangham Collection of Parasites of Freshwater Fish, and The Southeastern Cooperative Wildlife Diseases Study Collection of Parasites of White-tailed Deer. Major personal collections have been donated by F. W. Douvres, J. H. Fischthal, A. …

Go to article

A New Species Of Linstowia (Cestoda: Anoplocephalidae) From Marsupials In Bolivia, Scott Lyell Gardner, Mariel L. Campbell Oct 1992

A New Species Of Linstowia (Cestoda: Anoplocephalidae) From Marsupials In Bolivia, Scott Lyell Gardner, Mariel L. Campbell

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A new species of cestode of the genus Linstowia (Cestoda: Anoplocephalidae) is described from marsupials of the genera Thylamys and Monodelphis. The new species (Linstowia schmidti) differs from L. iheringi Zschokke, 1904, in having a much smaller strobila and reduced number of proglottids, and in the distribution of the eggs in gravid proglottids. In Bolivia, cestodes of the genus Linstowia appear to have a restricted geographic distribution, occurring in marsupials only in southeastern Bolivia near the western margin of the Chaco. This host-parasite association may represent an ecological-historical relict.

Go to article

Critical Comment: Designation And Curatorial Management Of Type Host Specimens (Symbiotypes) For New Parasite Species, Jennifer K. Frey, Terry L. Yates, Donald Duszynski, William L. Gannon, Scott Lyell Gardner Oct 1992

Critical Comment: Designation And Curatorial Management Of Type Host Specimens (Symbiotypes) For New Parasite Species, Jennifer K. Frey, Terry L. Yates, Donald Duszynski, William L. Gannon, Scott Lyell Gardner

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The accurate identification of a host organism is an important component in the taxonomic recognition of a new species of parasite. Correct identification, curatorial management, and safekeeping of the host specimen from which a parasite type specimen is collected is also desirable. We recommend that the host from which the type of a new parasite species is described should be designated as a symbiotype.

Go to article

Gerald D. Schmidt From The Perspective Of A Graduate Student, Scott Lyell Gardner Oct 1992

Gerald D. Schmidt From The Perspective Of A Graduate Student, Scott Lyell Gardner

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A commemoration of Gerald D. Schmidt (1934-October 20, 1990), University of Northern Colorado professor and recipient of the Henry Baldwin Ward Medal.

Go to article

Parasites Of The Extinct Shasta Ground Sloth, Nothrotheriops Shastensis, In Rampart Cave, Arizona, Gerald D. Schmidt, Donald W. Duszynski, Paul S. Martin Oct 1992

Parasites Of The Extinct Shasta Ground Sloth, Nothrotheriops Shastensis, In Rampart Cave, Arizona, Gerald D. Schmidt, Donald W. Duszynski, Paul S. Martin

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Of 7 dissected dung balls of the extinct Shasta ground sloth (Edentata) from Rampart Cave, Arizona, 4 (57%) were found to contain nematode juveniles, helminth eggs, and/or coccidian oocysts. One dung ball was radiocarbon dated at 10,500 ± 180 yr, about the time of ground sloth extinction. It is supposed that the parasites also are extinct. Agamofilaria oxyura n. sp. is proposed for first-stage juveniles of an oxyurid. These juveniles measured 13-20 x 126-198 (16.8 x 159) μm. Strongyloides shastensis n. sp. is reported as first-stage juveniles, some of which clearly are molting. These juvenile worms were 23-27 …

Go to article

New Distribution Records For Bunodera Eucaliae And Bunodera Inconstans N. Comb. (Digenea: Allocreadiidae: Bunoderinae) With Discussion Of Their Phylogenetic Relationships, Daniel R. Brooks Oct 1992

New Distribution Records For Bunodera Eucaliae And Bunodera Inconstans N. Comb. (Digenea: Allocreadiidae: Bunoderinae) With Discussion Of Their Phylogenetic Relationships, Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Bunodera eucaliae inhabits Culaea inconstans from eastern Ontario and western Nebraska, both new geographic distribution records. Culaeatrema inconstans inhabits Culaea inconstans from eastern Ontario, also a new distribution record. Comparison of Culaeatrema inconstans with species of Paracreptotrematina, Bunoderella, Bunodera, and Crepidostomum within a phylogenetic context suggests that it is the sister species of B. eucaliae. Accordingly, it is transferred to Bunodera, although the monophyly of Bunodera as a group has not yet been established because there is no synapomorphy linking Bunodera luciopercae with the clade containing Bunodera mediovitellata, Bunodera sacculata, B. eucaliae, …

Go to article

Resource Tracking In North American Telorchis Spp. (Digenea: Plagiorchiformes: Telorchidae), Alison Radtke, Deborah A. Mclennan, Daniel R. Brooks Oct 1992

Resource Tracking In North American Telorchis Spp. (Digenea: Plagiorchiformes: Telorchidae), Alison Radtke, Deborah A. Mclennan, Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

We examine the evolution of host specificity for species of Telorchis, using the methods developed by researchers studying phytophagous insect-plant systems. Optimization of "generalist" compared with "specialist" onto the phylogeny for Telorchis revealed ambiguous patterns, depending on how the two terms were defined. Regardless of that definition, most of the evolutionary diversification of this group has been carried out within eucryptodiran turtles, the ancestral host group. From that plesiomorphic background, there appears to have been two episodes of specialization by way of a host switch into caudates (ancestor of T. stunkardi + T. sirenis) and snakes (T. …

Go to article

Gerald D. Schmidt, Helminthologist, Robert L. Rausch Oct 1992

Gerald D. Schmidt, Helminthologist, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Obituary of Gerald D. Schmidt, helminthologist.

Go to article

First Prev Next Last