FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2392650663> ?p ?o ?g. }

• W2392650663 abstract "The recent opportunity of examining the faecal material of the water-scorpion Leccotrephes japonensis revealed a flagellate which had not previously been described from this host. After fuller investigation I found that it is a species new to science and should be referred to the genus Retortamona; I have named it Retortamonas leccotrephae sp. nov.The specimens of Leccotrephes japonensis used for studies on the parasitic flagellate R. leccotrephae, were collected from ponds on the outskirts of Shanghai, China. Apart from studying the living flagellates, at the same time stained specimens were prepared for the detailed study of various structures. These specimens were fixed either in Hollande's or in Schaudinn's fluid; stained in Heidenhain's haematoxylin, and destained in 2％ aqueous phospho-tungstic acid. Moskowitz' (1950) modification of the Protargol impregnation method was also used for staining.In the living state, the flagellare has a slender, slipper-shaped trunk with an anterior dorsal flexure. The mean body size, exclusive of the posterior spike, is 12.8μ×4.8μ. The length of the slender posterior spike varies from 4.6μ to 15.8μ. There are two flagella of unequal length. The longer one extends forwards and lashes rapidly, causing the animal to rotate and to pursue a special course. The shorter flagellum is directed backwards and usually lies in the cytostome; it moves in an undulating manner.In fixed and stained preparations, the flagellates, not including the posterior spike, show a size-range of 6.2×2.2μto 15.6×5.4μ, with a mean of 11.9×3.4μ. The spike varied from 4.6μ to 13.6μ long, with an average length of 11.2μ. In general, a normal specimen of R. leccotrephae has a slender body; the anterior portion is narrower than the postcerior, and is markedly bent as shown in the living indivi.duals. The posterior portion of the body usually has a dorsal convexity, and the widest region is located near the two-thirds of the body-length from the anterior end.Near that edge of the nuclear membrane lying next to the cytostome, there are two minute, but separate, basal granules which give rise to the two flagella. The anterior flagellum is about as long as the body proper: much longer and more slender than the posterior flagellum, which usually lies within the cytostome, and commonly shows a series of two or three undulations; it often stains more deeply than the anterior flagellum.In hematoxylin preparations the nucleus is well stained, and clearly shows a layer of chromatin granules lying against the nuclear membrane, and a large central endosome, composed of a mass of granules.The cytostome is a large structure in this animal. It usually occupies about twothirds of the total length of the body proper. Along the margin of the cytostome there are two deeply staining fibres, the one on the right margin is longer than that on the left.Both the precystic forms and cysts of R. leccotrephae have been observed. The body of precystic individuals which are preparing to encyst, becomes smailer and rounds up; meanwhile, the chromatin of the nucleus condenses and forms a deeply staining endosome. The anterior flagellum is still disposed freely, and no cyst wall has as yet been formed. The border-line of the cytostome is distinct, but the two basal granules are visible only in favourable preparations. The mature cysts are nearly peanut-shaped, and are about twice as long as wide. In the stained specimens they are about 4.6μ long and 2.4μ wide. The cyst wail is of uniform thickness, and the nucleus is visible at one end. The other conspicuous structures within the cyst are the two flagella and the cytostomial fibres, which are arranged as they are in the trophozoite, except that the anterior flagellum is here directed posteriorly.DISCUSSION SUMMARYIn its general body-form, R. leccotrephae closely resembles Mackinnon's R. agilis ('11) from crane-fly larvae, and also Corradett's R. gryllotalpae ('37) from the mole cricket, but it is especially like Geiman's R. caudacus ('32) from the aquatic larvae ef certain beetles." @default.
• W2392650663 created "2016-06-24" @default.
• W2392650663 creator A5016680425 @default.
• W2392650663 date "1953-01-01" @default.
• W2392650663 modified "2023-09-26" @default.
• W2392650663 title "A NEW SPECIES OF RETORTAMONAS (PROTOZOA: FLAGELLATA) FROM THE WATER SCORPION, LECCOTREPHES JAPONENSIS" @default.
• W2392650663 hasPublicationYear "1953" @default.
• W2392650663 type Work @default.
• W2392650663 sameAs 2392650663 @default.
• W2392650663 citedByCount "0" @default.
• W2392650663 crossrefType "journal-article" @default.
• W2392650663 hasAuthorship W2392650663A5016680425 @default.
• W2392650663 hasConcept C105702510 @default.
• W2392650663 hasConcept C115811362 @default.
• W2392650663 hasConcept C140530291 @default.
• W2392650663 hasConcept C151730666 @default.
• W2392650663 hasConcept C2776028635 @default.
• W2392650663 hasConcept C2776919888 @default.
• W2392650663 hasConcept C2778566189 @default.
• W2392650663 hasConcept C523546767 @default.
• W2392650663 hasConcept C54355233 @default.
• W2392650663 hasConcept C59822182 @default.
• W2392650663 hasConcept C74864618 @default.
• W2392650663 hasConcept C86803240 @default.
• W2392650663 hasConcept C90856448 @default.
• W2392650663 hasConceptScore W2392650663C105702510 @default.
• W2392650663 hasConceptScore W2392650663C115811362 @default.
• W2392650663 hasConceptScore W2392650663C140530291 @default.
• W2392650663 hasConceptScore W2392650663C151730666 @default.
• W2392650663 hasConceptScore W2392650663C2776028635 @default.
• W2392650663 hasConceptScore W2392650663C2776919888 @default.
• W2392650663 hasConceptScore W2392650663C2778566189 @default.
• W2392650663 hasConceptScore W2392650663C523546767 @default.
• W2392650663 hasConceptScore W2392650663C54355233 @default.
• W2392650663 hasConceptScore W2392650663C59822182 @default.
• W2392650663 hasConceptScore W2392650663C74864618 @default.
• W2392650663 hasConceptScore W2392650663C86803240 @default.
• W2392650663 hasConceptScore W2392650663C90856448 @default.
• W2392650663 hasLocation W23926506631 @default.
• W2392650663 hasOpenAccess W2392650663 @default.
• W2392650663 hasPrimaryLocation W23926506631 @default.
• W2392650663 hasRelatedWork W1567223388 @default.
• W2392650663 hasRelatedWork W1979940784 @default.
• W2392650663 hasRelatedWork W2006063780 @default.
• W2392650663 hasRelatedWork W2028968462 @default.
• W2392650663 hasRelatedWork W2034397317 @default.
• W2392650663 hasRelatedWork W2040186476 @default.
• W2392650663 hasRelatedWork W2058318025 @default.
• W2392650663 hasRelatedWork W2106008319 @default.
• W2392650663 hasRelatedWork W2166002970 @default.
• W2392650663 hasRelatedWork W2184834216 @default.
• W2392650663 hasRelatedWork W2329936924 @default.
• W2392650663 hasRelatedWork W2331660678 @default.
• W2392650663 hasRelatedWork W2350216127 @default.
• W2392650663 hasRelatedWork W2358697460 @default.
• W2392650663 hasRelatedWork W2359389917 @default.
• W2392650663 hasRelatedWork W2366665228 @default.
• W2392650663 hasRelatedWork W2415770508 @default.
• W2392650663 hasRelatedWork W2529254619 @default.
• W2392650663 hasRelatedWork W2553918366 @default.
• W2392650663 hasRelatedWork W3149340989 @default.
• W2392650663 isParatext "false" @default.
• W2392650663 isRetracted "false" @default.
• W2392650663 magId "2392650663" @default.
• W2392650663 workType "article" @default.