摘要:

SYNOPSIS.Eimeria galateai sp. n. from the paradise kingfisher (Tanysiptera galateaGray) andEimeria duncanisp. n. from the sacred kingfisher (Halcyon sanctaVigors&Horsfield) have been described from Papua New Guinea. Four of 11 paradise kingfishers were infected withE. galateaioocysts, measuring 13 (11–16) × 9 (8–11) μm. The oocysts were ovoid with nipple‐like protrusion at one pole. Micropyle and polar granule were absent, while oocyst residuum (5 × 4 μm) was present. Sporocysts, measuring 5 (4–6) × 2 μm, were elongate‐ovoid, and had a distinct convex Stieda body; the sporocyst residuum was absent. Two of 9 sacred kingfishers were infected with ovoid‐truncated, 22 (19–25) × 16 (12–18) μm oocysts ofE. duncani. Polar granule (5 × 2) was present in the oocysts, but there was no micropyle or oocyst residuum. Sporocysts were ovoid, measuring 9 (8–10) × 5 (4–6) μm, with a prominent Stieda body, and granular sporocyst residuum.Eimeria galateaiandE. duncaniare the first species of this genus to be described from bi

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00965.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

SYNOPSIS.A survey of 96 herbivorous mole‐rats,Spalax leucodonNordmann, in Lalahan district of Ankara, Turkey, revealed the presence of 6 new species of coccidia. The species found, the shape and average length‐width dimensions (in micrometers) of their oocysts, and the numbers of animals from which they were isolated were as follow:Eimeria lalahanensissp. n., subspherical to ellipsoidal (20.3 × 12.5), from 10;Eimeria tuzdilisp. n., spherical to subspherical with radially striated oocyst wall, (20.5 × 16.5), from 3;Eimeria spalacissp. n., ellipsoidal to cylindrical (16.3 × 9.8), from 90;Eimeria ellipticasp. n., ellipsoidal (14.3 × 10.1), from 8;Eimeria turkmenicasp. n., ellipsoidal (11.3 × 8.9), from 1;Isospora anatolicumsp. n., spherical (7.6 × 5.1), from 1 animal. The overall infection rate for 96 examined herbivorous mole‐ra

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00966.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00967.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

SYNOPSIS.Four new species ofHenneguya(myxosporidan) are described fromIctalurus punctatusRafinesque (channel catfish). They are as follows:Henneguya postexilissp. n. andHenneguya longicaudasp. n. from the gills;Henneguya adiposasp. n. from the adipose fin; andHenneguya diversissp. n. from the liver, kidney, connective tissue of muscles and fins, and tumor‐like external growths.Henneguya pellissp. n. is described from the dermis ofIctalurus furcatus(LeSueur) (blue catfish). The development stages of all described species are discussed.Henneguya exilisKudo was found on the gills of oneI. punctatus; notes on its spore characteristics are presente

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00968.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00969.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

SYNOPSIS.Cryptobia vaginalis(Hesse 1910) occurs as long thin and short broad forms in the vagina of the gnathobdelliform leechesHaemopis sanguisuga(Linnaeus) andHirudo medicinalisLinnaeus. Cytochemical staining for DNA and transmission electron microscopy of sectioned material indicate that in the thin forms the kinetoplast DNA (kDNA) is dispersed irregularly through the mitochondrial network (pankinetoplasticcondition) rather than concentrated in the adbasal region of the mitochondrion (eukinetoplasticcondition) as in trypanosomatids and most other kinetoplastid flagellates. Light‐microscopic studies on the rare broad forms, however, suggest that these have conventional adbasal location of the kinetoplast. Binary fission appears to occur in the thin forms, suggesting that the dispersed kinetoplast is either highly polyenergid or lacks a genetic function. In other features of its microanatomy,C. vaginalisis a conventional kinetoplastid. The flagellate has an incomplete corset of pellicular microtubules which may have a role in the cortical contractility characteristic of the genusCryptobia. Feeding is by pinocytosis of vaginal colloids through a microtubule‐lined cytopharynx, possibly after binding to a prominent filament‐coated preoral ridge. A pulsatile (contractile) vacuole is present and appears to be responsible for defecation as well as osmoregulation. Some individuals have elongate bacterial epibionts attached to the body in parallel with the cortical microtubules. All individuals have 2–8 spheroplast‐like endobiotic bacteria in the prenuclear

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00970.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

SYNOPSIS.The mature trophozoite of the acephaline gregarineZeylanocystis burtiDissanaike, parasitic in the seminal vesicles of the Sri Lankan earthwormPheretima peguanaRosa, was studied by cytochemical methods and by electron microscopy. Some observations were also made on gametocysts and oocysts.The trophozoite has a peculiar saucer shape, unlike other monocystid gregarines, and has marginal papillae with cytoplasmic hairs. Its fine structure conforms broadly to that of other gregarines, but differs with respect to its fibrillar organization and in some details of cytoplasmic organelle structure. The pellicle is composed of 2 parallel unit membranes elevated into a number of stumpy epicytary folds, more or less evenly distributed on both surfaces of the gregarine. Some of these are associated with adjacent accessory cells and may have a nutritive role. Bundles of fine microfilaments (5–6 nm) were detected both in the ectoplasm and deep in the endoplasm; these are possibly the main contractile elements (“myonemes”) involved in movement. Microtubules are larger (22–24 nm) and are found predominantly in papillae and cytoplasmic hairs, but extend also in small bundles beneath the pellicle—they appear to be more skeletal in nature. The significance of these findings is discussed in the light of recent work on the roles of microfilaments and microtubules in nonmuscle cells. Mitochondria are located superficially and have a complex organization. The endoplasmic reticulum is poorly developed, but ribosomes are abundant. Golgi lamellae‐like membranes and vesicles akin to lysosomes were observed. Typical paraglycogen granules were found together with blobs of lipid and glycogen. The nucleus had a wrinkled envelope, a homogeneous matrix, and a spherical nucleolus.A variety of staining reactions and cytochemical tests were carried out. The distribution of lipids, polysaccharides, nucleic acids, calcium, and melanin were studied. Succinate dehydrogenase was detected in mitochondria, thiamine pyrophosphatase in Golgi bodies, and acid phosphatase in lysosomes. Golgi structures were found to be chemically very complex.Gametocysts and oocysts were associated with extraneous cells which probably contribute to the formation of their walls. The gametocyst wall is thin and consists of 2 membranes of the unit type. The oocyst wall is thicker and composed of 2 chemically different layers. Telolysosomes were seen in the disorganized residual cytoplasm within

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00971.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

SYNOPSIS.The ultrastructural changes occurring during encystment ofAcanthamoeba palestinensishave been investigated. The cyst wall consists of endocyst and exocyst, both having the same fine structure. At irregular intervals in the cyst wall ostioles occupied by opercula are present. The nuclear membrane forms bulb‐shaped projections and releases vesicles bounded by double membranes into the cytoplasm. Dense nucleolus‐like bodies of different sizes and variable numbers are found in the nucleus of every cyst. The importance of the cyst structure as a taxonomic criterion is discus

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00972.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00973.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

SYNOPSIS.Gamogony ofTheileria annulataDschunkowsky&Luhs occurs within the intestine of nymphs of the tickHyalomma anatolicum excavatumKoch. After the 5th daypost repletionem(p.r.) of the ticks spherical and ovoid parasites were found within the intestinal cells. These stages were thought to represent fertilized macrogametes. These underwent a transformation process leading ultimately to the differentiation of a motile stage, thekinete, which leaves the intestinal cells on the 14th‐17th day p.r. and penetrates the alveoles of the salivary glands. The transformation of the stationary into a motile stage takes place by formation of a growing protrusion (= anlage) into an inner, enlarging vacuole. During this process the limiting membrane of the vacuole serves as the outer membrane of the developing motile stage, whereas the 2 inner membranes of its pellicle are newly formed. The steps of this differentiation inT. annulataare compared to the process of ookinete formation in haemosporin

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1977.tb00974.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY