New nematodes from birds. Part II
TL;DR: Two new Ascarids are described, one of which bears oesophageal ventriculus, two ventricular appendices and an intestinal caecum and the other is characterised by the possession of two intestinal caeca and no dentigerous ridges on the lips.
Abstract: Two new Ascarids are described. Amplicaecum ixobrychusi n. sp. is characterised by the possession of two intestinal caeca and no dentigerous ridges on the lips. Duplicaecum ibisi gen. et sp. nov. bears oesophageal ventriculus, two ventricular appendices and an intestinal caecum.
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01 Jan 1935
TL;DR: The general character of “The Fauna of British India” is so well known, and has been so frequently commented on, that it is only necessary to say that the present half-volume is similar to those which have preceded it, and that the high character of the series is fully maintained.
Abstract: WE congratulate the editor and author on the appearance of another half-volume of this important work. The present instalment is devoted to the homopterous family Jassidæ, subfani. v. Jassinae (including Acocephalinae), comprising twelve divisions, and subfam. Typhlocybinas, with two divisions. The species included are numbered from 2509 to 2696. An appendix is commenced, including additions to the Rhynchota Heteroptera discussed in vol. i.; and the portion now published relates to the families Penta-tomidae, Coreidae, arid Berytidae, and the additional species are numbered from 2697 to 2768. The general character of “The Fauna of British India” is so well known, and has been so frequently commented on, that it is only necessary to say that the present half-volume is similar to those which have preceded it, and that the high character of the series is fully maintained.The Fauna of British India, including Ceylon and Burma.Published under the authority of the Secretary of State for India in Council. Edited by Lt.-Col. C. T. Bingham. Rhynchota. Vol. iv., part ii. Homoptera and Appendix (Part i.) By W. L. Distant. (London: Taylor and Francis, 1908.) Price 10s.
3,032 citations
TL;DR: Y Yorke and Maplestone's book is actually a boiled-down library and museum combined, and makes possible an enormous amount of work in the far corners of the World which otherwise could not have been attempted, and will be the means of saving countless hours of tedious work for every investigator who interests himself in any phase of the study of nematodes which Evolves determination of genera.
Abstract: The study of parasitic nematodes has proceeded at an extremely rapid rate in recent years, and it has become increasingly difficult for investigators, particularly those who are interested in systematic phases of the subject (and every parasitologist is and must be to a greater or less extent), to keep abreast of the current literature. What constituted single genera fifty years ago, with no more species than one could count ?n his fingers, may now be split into as many genera ^ there were formerly species, and the number of described species has increased many fold. As Dr. Stiles Points out in his foreword, the present tendency is to seek knowledge for the sake of the good it will do rather than for the sake of knowledge itself, and it is because ?f this changed viewpoint that nematology has so Sreatly expanded. Except in a few of the largest library centres of the world, only a fraction of the hterature is ever available, and the worker who is far Removed from these centres is greatly restricted in his field and hopelessly handicapped in much research which he might otherwise profitably pursue. Yorke and Maplestone's book is actually a boiled-down library and museum combined, and makes possible an enormous amount of work in the far corners of the World which otherwise could not have been attempted, and it will be the means of saving countless hours of tedious work for every investigator who interests himself in any phase of the study of nematodes which Evolves determination of genera. The book makes it Possible for anyone with a knowldge of nematode Morphology to place correctly any species of nematode which he may come upon in its proper genus, if it belong to any genus described up to the middle of 1925. The book contains clear and carefully worked out keys to all the superfamilies, families, and genera of Parasitic nematodes, the best available description of the genera, the name and synonyms of the type species, and a list of such species as can, with a reasonable degree of certainty, be ascribed to each genus. Of Iriestimable value are the drawings which illustrate the essential characteristics of each genus. In most cases these are drawings of the type species, but in a few
900 citations
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01 Jan 1922
102 citations
TL;DR: The Helminths herein reported are of importance because of their economic and taxonomic relations, and superparasitism and significant cases of parasitism are pointed out because they are of interest to one concerned with incidence and degree of infestation.
Abstract: The Helminths herein reported are of importance because of their economic and taxonomic relations. To point this out, it is only necessary to mention Haemonchus, whose relation to the Bovidae and Ovidae is equivalent to those of Necator and Ancylostoma to the human host.Some are well-known roundworms having a world-wide distribution as parasites of animals, and are listed only on account of locality and museum interest; others, especially certain rare forms from uncommon hosts, are of greater interest and are discussed more fully. Certain details, at one time thought not.to be necessary and hence neglected are added because to-day they are indispensable for specific designation.Because of the abundance of material, it has been possible to supplement accounts given by other authors and to correct some errors due, no doubt, to poor or too few specimens. Several changes in systematic position of known forms and confirmation of others are made.A new name (D. histrix) is proposed for Dirofilaria subcutanea (Linstow, 1899) Boulenger, 1920. Eustrongylides larvae, of Ciurea, J. 1924, are included under the pre-adult stage of a new species (Eustrongylides wenrichi) because both are alike and their characters fit no other known species. New information is added about Trypanoxyuris trypanuris Vevers, 1923, and Cyrnea coloni Cram, 1927, amending their descriptions.Descriptions and illustrations of seven new species in as many genera are given. They are Acuaria (Dispharynx) resticula from a groove-billed ani, Ascaridia petrensa from a partridge, Dirofilaria spinosa from a porcupine, Physaloptera multiuteri from a monkey, Subulura pennula from a quail, Spironoura procera from a terrapin, and the above-mentioned pre-adult Eustrongylides wenrichi from a stream pike, brook-trout, calico bass, sunfish, and a frog.In all there are 162 determinations in 38 genera and 56 species, including new ones, from 150 hosts involving 117 different host species.Superparasitism and significant cases of parasitism are pointed out because they are of interest to one concerned with incidence and degree of infestation. Numerous records of new host-parasite relations and new localities will be of interest to students of distribution.
95 citations
TL;DR: The great French helminthologist, Dujardin, appears to have been the first to suggest a grouping of the genus “ Ascaris ” according to the structure of the alimentary canal.
Abstract: The great French helminthologist, Dujardin, appears to have been the first to suggest a grouping of the genus “ Ascaris ” according to the structure of the alimentary canal. As is, unhappily, only too well known to modern helminthologists, little attention was paid to internal structures by the earlier workers, whose numerous descriptions and classifications were based almost entirely upon external characters. It is now recognized that a natural system must be based on a survey of the whole structure of the animal, both external and internal, and a re-examination of many of the older species becomes extremely important.
55 citations