ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04784.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACTReinvestigation of the type population of the sorocarp‐forming ciliateSorogena stoianovitchaeBradbury&Olive, 1980 using the Fernández‐Galiano technique and various electron‐microscopy techniques (scanning electron microscopy, freeze‐fracture and ultrathin sections) expands the observations reported in the original description of the species,Sorogena stoianovitchaeis a colpodid ciliate with oral ciliature consisting of 25 ciliated paroral dikinetids on the right and 3‐5 small adoral organelles on the left of an elongated and domed oral slit, resembling that of the genusPlatyophrya. Sorogena stoianovitchaedivides in the free swimming condition and not in a division cyst, as is the case in the colpodids sensu stricto (s. str.), e.g.Colpoda, Bresslaua.orTillina, As shown in a detailed light‐microscopy study, morphogenesis inS. stoianovitchaeis of the stomatic mode typical for certain colpodid ciliates. Based on the wealth of new information the phylogenetic position of S.stoianovitchaeis discussed at some length and arguments are given in favor of the following classifications:S. stoianovitchaeBradbury&Olive, 1980 currently sole member of the family Sorogenidae Bradbury&Olive, 1980; order Sorogenida Foissner, 1985;subclassColpodiaFoissner, 1985; class Colpodea Small&Lynn, 1981. This investigation facilitates the discovery of further members of this genus reported primarily from the tropical and subt

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04785.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04786.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04787.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACTEndosymbiotic methanogenic bacteria of three species of anaerobic ciliates(Plagiopyla frontata, Metopus conforms, andM. palaeformis)were inactivated with the specific methanogen inhibitor 2‐bromoethanesulfonic acid. the absence of endosymbiont methanogens reduced growth rate and growth yield by about 30% inP. frontataandM. contortus, while no significant change in fitness was observed inM. palaeformis.InPlagiopylathe growth rate constant is not affected by an artificially increased pH2neither in normal nor in methanogen‐free ciliates. the energetic advantage conferred by endosymbiont methanogens inPlagiopylaand inMetopus contortusprobably is due to excretion of organic material from the bacteria at the expense of bacterial reproduction. It is unlikely that the maintenance of a low pH2within the cells due to H2‐consumption by the bacteria is important to the cil

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04788.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04789.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04791.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACTFeces from a juvenile specimen of the anteaterTamandua tetradactylafrom Ponta de Pedras, Marajó, Pará, northern Brazil, contained three different coccidial oocysts:Eimeria tamanduaeLainson, 1968;E. corticulataLainson&Shaw, 1990; and a third species previously unrecorded and described here asEimeria marajoensisn. sp. Oocysts of the latter parasite are spherical to subspherical, 13.9 ± 1.5 times 13.4 ± 1.4 (11.1‐16.5 times 11.1‐16.5) μm, shape index (length/width) 1.0 (1.0‐1.2). the oocyst wall is a single, Colorless layer about 0.6‐1.0 μm thick with no striations or micropyle. There is no oocyst residuum, but a single, round, oval or irregularly shaped polar granule of about 0.75‐2.5 μm is consistently present. the sporocysts are broadly ellipsoidal, 7.1 ± 0.7 ± 5.3 ± 0.6 (6.0‐8.8 times 4.0‐5.7) μm, shape index 1.3 (1.2‐1.5), with a delicate wall bearing a minute stieda body. No sub‐stieda body was visible. the sporocyst residuum consists of some 10‐20 rounded granules, lying between the two slightly curved sporozoites which measure approximately 6.5 times 2.0 μm. Sporocyst refract

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04792.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACTMicrofilum lutjanin. g., n. sp. (Microsporida) was found on the gill filaments ofLutjanus fulgens(Teleost) inhabiting the coasts of Senegal. This microsporidium forms xenomas distinguished by the microvilli covering the plasma membrane. At all stages of development individuals have isolated nuclei and are in direct contact with the host cytoplasm. Merogony is binary and sporogony is tetrasporoblastic. the spore (4.75 times 2.60 μm)) is characterized by a manubrium inserted on a laterally offset anchoring disc and extending into a very short, noncoiled polar filament (no longer than 500 nm) in the form of a hook. This type of polar filament has not been described previously in the Microsporida

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04793.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1991.tb04794.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY