New Species Of Trematodes Research Articles

Equine Strongylidae and other parasitic nematodes described by Arthur Looss during 1895–1911 in the collections of the Swedish Museum of Natural History

Prof. Arthur Looss (1861-1923) was a prolific German parasitologist, who, among other things, authored descriptions of 22 new species of nematodes and 115 new species of trematodes. After his death, his collection (including type material) was split between several institutions: Smithsonian National Museum of Natural History in Washington (USA), Natural History Museum in Berlin and the Natural History Museum in Leipzig (Germany), Gothenburg Museum of Natural History and Swedish Museum of Natural History (Sweden). Here we revise all type specimens of nematodes from the A. Looss collection that are currently preserved in the Swedish Museum of Natural History (Strongylus subtilis, Sclerostomum edentatum, S. vulgare, Cyathostomum labratum, C. coronatum, C. bicoronatum, C. calicatum, C. alveatum, C. catinatum, C. nassatum, C. radiatum, C. elongatum, C. auriculatum, Triodontus minor, T. serratus, C. labiatum and Uncinaria polaris), designate and describe lectotypes wherever deemed necessary and provide catalogue access numbers to all type materials. We also revise all notes and drawings associated with new species that A. Looss described and provide previously unpublished pencilled sketches and ink print-ready drawings of some of these species (Strongylus subtilis, Cyathostomum poculatum, C. radiatum, C. elongatum, C. calicatum, C. auriculatum, Triodontus serratus, Trichostrongylus vitrinus and possibly Necator africanus).

Metacercariae of new trematode species of the genus Diplostomum (Trematoda, Diplostomidae) from fishes of Lake Tana, Ethiopia

Four new species of trematodes of the genus Diplostomum are described from metacercariae found in fishes from Lake Tana in Ethiopia: Diplostomum garrae sp. n. from the lens of Garra dembecha, D. longicollis sp. n. from the lens of Barbus humilis, D. montanum sp. n. from the lens of Barbus humilis, and D. tilapiae sp. n. from the vitreous body of Oreochromis niloticus. The metacercariae of the new species considerably differ in morphology and size from those of all known Holarctic species. It is the first African record of metacercariae of the genus Diplostomum in fish.

Three new species of cercariae from Melanopsis praemorsa (L. 1758, Buccinum) snails in Al-Bathan fresh water body, Palestine

ObjectiveTo investigate other new species of cercariae encountered in Melanopsis praemorsa (M. praemorsa) snails collected from Palestine. MethodsA total of 1 100 M. praemorsa were collected from Al-Bathan water body, Palestine, from November, 2010 to November, 2011. Cercariae in M. praemorsa were obtained by emerging and crushing methods. ResultsOther three new different species of cercariae have been identified from this snail. These species were Xiphidiocercaria (Cercaria melanopsi palestinia IV), Microcercous (Cercaria melanopsi palestinia V) and Longifurcate cercaria (Cercaria melanopsi palestinia VI). The infection rate of M. praemorsa with these three different cercariae was (42.2%). Coinfection with Xiphidiocercariae and Longifurcate cercariae or Xiphidiocercariae and Microcercous cercariae has been noted and coinfection rate was 1.23% among the infected snails. The highest cercarial infection rate was in June (64.3%). No infected snails were found in September. It was also noted that infected snails attained a larger size than uninfected ones and all infected snails had a size between 17–22 mm (average 20 mm). ConclusionsOur studies imply that there are potentially more new species of trematodes in this area than were found until now. Due to the presence of infected M. praemorsa and may be species of other snails, water resources could be contaminated by the emerging new cercariae, consequently attack the local people directly via the skin or are transferred to them by metacercariae ingestion. More surveys are needed to identify the real prevalence of the trematodes both in human and animal hosts, and also to determine the range of snail hosts of the parasite in enzootic areas of the disease, as well as the life cycle and biology of trematodes and its effects on man should be elucidated.

A New Genus and Two New Species of Trematodes from Characid Fishes in Colombia

A New Genus and Two New Species of Trematodes from Characid Fishes in Colombia

New Species of Trematodes from Birds in the Pacific Northwest

Four new species of trematodes, representing four families, are described as parasites of birds collected in the Pacific Northwest. Some new host and distribution records are included for other species of trematodes from birds. Most of the host birds were collected by Drs. Thomas Burleigh and Malcolm Jollie. The drawings were made by projecting stained whole mounts, and filling in details after more critical observations with the aid of a microscope. Measurements are in microns unless indicated otherwise. The author is indebted to Dr. W. W. Becklund, Beltsville Parasitological Laboratory, for the loan of type specimens. Family Eucotylidae Skrjabin, 1924 Eucotyle warreni sp. n. (Figs. 1, 2) Body flat, elongate, spinous, 4 to 4.8 mm long by 0.5 to 0.7 mm wide, anterior end has triangular collar which is 499 to 530 long; body spines sharppointed, 11 to 14 long. Oral sucker terminal, 202 to 234 long by 249 to 265 wide; ventral sucker absent. Pharynx 109 long by 124 to 140 wide, partly dorsal to oral sucker; cluster of unicellular glands at posterior end of pharynx; prepharynx absent; esophagus 343 to 405 long; intestinal ceca extend to within 312 to 390 of posterior end of body. Cirrus and cirrus pouch absent; seminal vesicle thick-walled, 124 to 170 long by 78 to 120 wide, to right of median line; genital pore median, at anterior end of seminal vesicle. Testes lobed, opposite, in midbody region, ventral to ceca, 280 to 436 long by 140 to 171 wide; vasa efferentia passing obliquely forward to join short vas deferens. Ovary lobed, to left of seminal vesicle, 218 to 312 in diameter. Vitelline follicles in narrow rows, lateral to ceca, between testes and collar; transverse vitelline ducts posterior to ovary; vitelline reservoir immediately posterior to ovary. Uterine folds fill intercecal space from level of cecal bifurcation to posterior end of body, overlapping ceca posterior to testes. Eggs operculate, brown, 28 to 35 long by 12 to 14 wide. Excretory vesicle and seminal receptacle not observed. Definitive host: Mallard duck (Anas platyrhynchos Linn., 1758). Habitat: Kidneys and ureters. Type locality: Latah County, Idaho. Type specimens: Holotype No. 61786 and three paratypes No. 61787 deposited in the USNM Helm. Coll. Received for publication 12 May 1967. Remarks The species is described from 15 specimens and is named in honor of Mr. Jack Warren who collected the host. E. warreni resembles E. wehri Price, 1930, more closely than any other species in the genus. Examination of holotype No. 29188 of the latter species, borrowed from the U. S. National Museum, revealed that specimens of E. warreni are about twice as long as those of E. wehri. The oral sucker and collar are 25 to 30% larger and the ovary and testes are more than twice as large in E. warreni. Both species are spinous but the spines on E. warreni are sharp-pointed and 11 to 14 long while those of E. wehri are blunt-pointed and only 7 long. Only one of 15 specimens of E. warreni contained spines, indicating that they are shed readily. E. wehri was reported as a parasite of the bluewinged teal, Querquedula discors Linn., 1766,

ALARIA CANADENSIS SP. NOV. AND EURYHELMIS PYRIFORMIS SP. NOV. FROM THE SKUNK MEPHITIS MEPHITIS IN QUEBEC

Two new species of trematodes, Alaria canadensis and Euryhelmis pyriformis, are described from the skunk Mephitis mephitis Schreber, in the Province of Quebec.

New Helminths from North Carolina Salamanders

Our knowledge of the helminths parasitic in the salamanders of North America is very limited. Few extensive studies have been made on this group of worms. Leidy, Stafford, Walton, and Harwood have made the most important contributions. More than a thousand hosts representing nineteen species were examined for their parasites in the present study. Five new species of trematodes and two of nematodes were found.

Notes on New Aspidogastrid Species, with a Consideration of the Phylogeny of the Group

1. Cotylaspis sinensis and Lophotaspis orientalis are described as new species of trematodes from the small intestine of the turtle, Amyda tuberculata, from Foochow, Fukien Province, China.2. Stichocotyle cristata is described as a new species from the spiral valve of the cow-nosed ray, Rhinoptera quadriloba, from Biloxi Bay, Mississippi.3. A new subgenus, Multicalyx, is created for the species Stichocotyle cristata, while the species S. nephropis appropriately belongs to a new subgenus Stichocotyle.4. Evidence is provided that aspidogastrid worms are referable neither to the Monogenea nor the Digenea, but belong to an intermediate subclass group, Aspidogastrea, n.n.5. The genus Stichocotyle has been removed from the family Aspidogastridae Poche, 1907, and placed in a new family, Stichocotylidae.

New Species of Trematodes from the Gills of Illinois Fishes

This investigation began in the fall of 1933 as a general survey of the parasites of the Centrarchidae of Champaign County, Illinois. After two years of collecting, an attempt was made to identify the collected specimens. Due to coagulation of adherent mucus and subsequent adhesion of specimens to the inner surfaces of the vials, no Gyrodactyloidea were found in the fluid poured from containers in which they were originally placed. New material was collected and identification of parasites in a live state was begun, together with work on the problem of perfecting a suitable technique adequate for research on this group. Examination revaled several undescribed species of gill trematodes of the subfamily Tetraonchinae, twelve of which are treated in this publication. The problem has been restricted to the monogenetic forms from Illinois fishes.

Three new species of trematodes from birds

Three new species of trematodes from birds

Two new species of trematodes of the genus Parametorchis from fur-bearing animals

Two new species of trematodes of the genus Parametorchis from fur-bearing animals

New Trematodes from the Newt Triturus viridescens

The writer has found three apparently new species of trematodes in the newt, Triturus viridescens Rafinesque. The newts were collected near Durham and Lakeview, North Carolina, and a study is being made to determine if there is any seasonal periodicity in the occurrence of their parasites. It is of interest that one trematode, Opisthodiscus americanus, is the first species of its genus to be reported for North America. Only one species of Brachycælium has been reported previously for North America and another, B. trituri, is described in this paper. A new species, Gorgoderina intermedia, is also described.

Some Marine Fish Trematodes of Maine

During the summer of 1924 a study of marine fish parasites was made at the Mount Desert Island (Me.) Biological Laboratory. The present paper represents a preliminary report on the trematode group. Three new species of trematodes are described. Only brief consideration is here given to species already known. A later paper will deal more completely with these and related forms. The writer is indebted to Dr. H. B. Ward under whose direction the studies were under-