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2.
A new species of Arenopontia ( Neoleptastacus) is described on the basis of a single female collected from one sandy beach in Montenegro, Adriatic Sea. With the addition
of the new species, the subgenus Neoleptastacus now includes 18 species throughout the world. At the end of this paper there is a key for their determination.
Received: 20 March 1999 / Received in revised form: 15 September 1999 / Accepted: 21 September 1999 相似文献
5.
Arctodiaptomus (Rhabdodiaptomus) michaeli n.sp. is described from the material collected in Alapathar Lake and Marsar Lake of Kashmir, India. 相似文献
7.
A new unicellular species of the genus Chrysosphaerella (Chrysophyceae) was found in fresh-water ponds in Switzerland, Japan, and the U.S.A. It is described as C. solitaria. The genus is divided into two subgenera: Chrysosphaerella, comprising the colonial species, and Pseudochrysosphaerella, the unicellular ones. 相似文献
8.
Mastophoropsis canaliculata (Harvey in Hooker) gen. et comb. nov. (Corallinaceae, Rhodophyta) is restricted to south-eastern Australian waters. It is unique among Corallinaceae in possessing an erect, tenacular, branched, taeniform, non-geniculate thallus which produces multiporate tetrasporangial conceptacles. Based on a detailed morphological and anatomical study, including an examination of the designated lectotype, this taxon is referred to the tribe Phymatolitheae in the subfamily Melobesioideae and its relationships to other non-geniculate Corallinaceae are discussed. A simplified microtechnique procedure involving decalcification with nitric acid, resin embedding and staining serially mounted sections with KMnO 4 also is outlined. X-ray microanalysis of surface tissues indicates that calcification occurs largely as CaCO 3 and that various structures contain substantially differing amounts of Ca. 相似文献
9.
Eighteen monocotylid species were collected from elasmobranchs during surveys of the parasites of fishes of Moreton Bay, Queensland, Australia. Two new species, Calicotyle cutmorei n. sp. (Calicotylinae) from Carcharhinus sorrah (Valenciennes) (Carcharhiniformes) and Dendromonocotyle raiae n. sp. (Monocotylinae) from Hemitrygon fluviorum (Ogilby) and Neotrygon trigonoides (Castelnau) (both Myliobatiformes) are described and illustrated. Six new faunal records for Moreton Bay are reported: Thaumatocotyle australensis Beverley-Burton & Williams, 1989 (Merizocotylinae) from Maculabatis toshi (Whitley) (Myliobatiformes); Monocotyle corali Chisholm, 1998 (Monocotylinae) from Pastinachus ater (Macleay) (Myliobatiformes); Neoheterocotyle rhynchobatis (Tripathi, 1959) Chisholm, 1994 (Heterocotylinae) from Glaucostegus typus (Anonymous [Bennett]) and Aptychotrema rostrata (Shaw) (both Rhinopristiformes); and Decacotyle elpora Marie & Justine, 2005 (Decacotylinae), Dendromonocotyle torosa Chisholm & Whittington, 2004 (Monocotylinae), and Clemacotyle australis Young, 1967 (Monocotylinae) from Aetobatus ocellatus (Kuhl) (Myliobatiformes). Maculabatis toshi is a new host record for T. australensis, and A. rostrata is a new host record for N. rhynchobatis. Ten species previously recorded from Moreton Bay were collected: Monocotyle caseyae Chisholm & Whittington, 2005 (Monocotylinae) and Heterocotyle whittingtoni Chisholm & Kritsky, 2020 (Heterocotylinae) from M. toshi; Monocotyle sp. A of Chisholm (1998a) (Monocotylinae) from H. fluviorum; Dendromonocotyle kuhlii Young, 1967 and Monocotyle kuhlii Young, 1967 (both Monocotylinae) from N. trigonoides; Thaumatocotyle cf. pseudodasybatis Hargis, 1955 (Merizocotylinae), Empruthotrema kearni Whittington, 1990 (Merizocotylinae) and Decacotyle octona Young, 1967 (Decacotylinae) from A. ocellatus; and Mycteronastes icopae (Beverley-Burton & Williams, 1989) Kearn & Beverley-Burton, 1990 (Merizocotylinae) and Troglocephalus rhinobatidis Young, 1967 (Dasybatotreminae) from G. typus. 相似文献
10.
Pararalichus gen.n. (Pterolichidae, Pterolichinae) is described; two species groups, from species of Brotogeris Vigors and Touit Gray, respectively, include two named and ten new species. From Brotogeris : the type species Pararalichus dilatatus (Favette & Trouessart) stat.n., comb.n. [= Protolichus ( Mesolichus ) hemiphyllus dilatatus ] from Brotogeris jugularis (Müller), Brazil, Guatemala, Panama; P. chrysopteri sp.n. from B. chrysopterus (L.). Guyana, Surinam; P. cyanopterae sp.n. from B. cyanoptera (Pelzeln), Bolivia, Peru; P. pyrrhopteri sp.n. from B. Pyrrhopterus (Latham), Ecuador, Peru; P. sanctithomae sp.n. from B. sanctithomae (Müller), Bolivia, Peru; P. tiricae sp.n. from B. tirica (Gmelin), Brazil; P. versicolori sp.n. from B. versicolorus (Müller), Brazil, Peru. From Touit: P. hemiphyllus (Mégnin & Trouessart) comb.n. [ =Pterolichus (P.) hemiphyllus ] from Touit batavica (Boddaert), Surinam, Trinidad; P. dilectissimae sp.n. thrn T. dilectissima (Sclater & Salvin), Colmbia, Costa Rica; P. huetii sp.n. from T. huetii (Temminck), Brazil, Guyana, Peru; P. parpuratae sp.n. from T. purpurata (Gmelin), Brazil, Guyana, Surinam; P. surdae sp.n. from T. surda (Kuhl), Brazil. All hosts are Central and South American parrots. Mesolichus Trouessart, 1899 is recognized as a monotypical genus. 相似文献
11.
Zusammenfassung Bei den Vertretern einiger Diplopoden-Familien ist der Mitteldarm von einer zelligen Hüllschicht umgeben. Die Perikaryen stehen dicht bei dicht, basale Ausläufer durchziehen die Fasern der Muskularis und verzweigen sich sekundär beim Eintritt in die sehr dicke Basallamina des Mitteldarmepithels. Die terminalen Endigungen jeder Zelle dringen in ein extrazelluläres basales Labyrinth je einer ausdifferenzierten Mitteldarmzelle ein und verflechten so die Hüllschicht mit dem Darmepithel. Darüberhinaus scheint es Fusome zwischen den Endaufzweigungen und der Mitteldarmzelle und damit die Möglichkeit eines intrazellulären Stofftransports zwischen beiden Zellen zu geben.Die Hüllschicht ist kein Epithel, denn Zellkontakte zwischen benachbarten Zellen fehlen ebenso wie eine gemeinsame Basallamina. jede Zelle ist von ihrer eigenen, dünnen Basallamina umgeben. Sie wird außerdem bei normal ernährten Individuen durch einen großen Vorrat an Glykogen und zahlreiche Zytosomen charakterisiert. Viele Mitochondrien sind dadurch vor allem in die Zellperipherie oder in die basalen Ausläufer gedrängt. In deren Nähe findet man auch überwiegend glattes endoplasmatisches Retikulum, und auch freie Ribosomen sind nicht selten. Der Zellkern vermittelt den Eindruck hoher Stoffwechselaktivität; ein Nukleolus ist immer vorhanden. Mikrotubuli sind im Zellkortex parallel zur Oberfläche orientiert, vor allem aber in den basalen Ausläufern in Längsrichtung. Obwohl kein Fett gespeichert wird, kann man die Zellen mit dem Chloragog-Gewebe der Anneliden oder mit den Leberzellen der Vertebraten vergleichen. Sie scheinen von den Mitteldarmzellen Nährstoffe zu übernehmen, diese zu verarbeiten, die Produkte freizusetzen oder zu speichern und dabei wertlose stickstoffhaltige Moleküle in den Zytosomen abzulagern. Der gebräuchliche Terminus Leberzellen ist daher angebracht.Tiere, die 14 Tage ohne Nahrung gehalten wurden, zeigen eine erhebliche Schrumpfung der Leberzellen. Deren Plasmalemm ist nur an einigen Stellen mit der Basallamina verbunden, überall sonst ist der extrazelluläre Raum zwischen Zellmembran und Basallamina stark erweitert. Das Glykogen ist größtenteils abgebaut. Der elektronenoptische Kontrast der verschiedenen Zellelemente ist äußerst schwach. Die Mikrotubuli sind völlig verschwunden. Nur die Zytosomen heben sich weiterhin deutlich ab. Aber auch sie scheinen umgewandelt und zu wenigen Ansammlungen zusammengeflossen zu sein. Dies deutet auf Mobilisierung des gespeicherten Glykogens hin, kann aber auch beginnende Degeneration der Leberzellen signalisieren.
Fine structure of the liver cells ofOxidus gracilis (C.L. Koch, 1847) (Diplopoda, Paradoxosomatidae) Summary In some families of Diplopods the midgut is surrounded by an enveloping cell layer. Basal runners of their pericarya get through the longitudinal and transversal muscle fibres and ramify secundarily before entering the very thick basement membrane of the midgut epithelium. The terminal branches of each cell enter into a basal labyrinth of only one differentiated midgut cell interlacing intensively with the epithelium in this way. Moreover it seems that there are open junctions (fursomes) between terminal branches and the midgut cell and therefore an intracellular transport of materials.The enveloping layer is no epithelium. THere are no typical contacts between neighbouring cells; each enveloping cell is surrounded by its own thin basement membrane, a common basement membrane does not exist. Enveloping cells of normally nourished individuals are characterized by a large storage of glycogene in the cytoplasm. Besides this there are many distinct cytosomes which point at a significant activity in metabolism. Many mitochondria, which mostly pushed off towards the cell periphery or lie in the primarily ramifications indicate the same. Close by there is also prevailing smooth endoplasmic reticulum. Free ribosomes are not rare. The nucleus gives the impression of activity in metabolism too; a nucleolus does exist. Microtubules arranged parallely to the cell surface in the cortex, but especially in the basal ramifications in longitudinal direction can be seen. Though lipoids are not being stored, one might compare these cells with the chloragog tissue in annelids or with the liver cells in vertebrates. They seem to accept food from the midgut cells, to digest and release, respectively store it temporarily, depositing at that valueless nitrogene containing molecules into the cytosomes. The usual term liver cell therefore is wellchosen.Animals after 14 days without food signify a large shrinkage of the liver cells. Plasmalemma is fixed only at certain points to the basement membrane; the extracellular space between them is widened extremely. Glycogene mostly is removed. The electron microscopically visible contrast of the cell elements is very faint. Microtubules have disappeared. Cytosomes, however, contrast distinctly. But they, too, seem to be transformed and joined into a few accumulations. This points to mobilization of the stored glycogene, but in the same manner also to symptomes of degeneration brought into action.
Herrn Professor Dr. Dr. h.c. W.E. Ankel zu seinem 80. Geburtstag am 7.8.1977 gewidmet 相似文献
12.
A proboscidean skull from Cheparawa, (Muruyur Formation, Kenya), differs markedly from those of Eurasian Choerolophodon ( C. pentelici, C. dhokpathanensis). It is morphologically and metrically close to the holotype of Choerolophodon kisumuensis (MacInnes) a partial skull from Maboko, much of which has been reconstructed in plaster of Paris. The more complete remains of this species now available indicate that it should be placed in a genus separate from Choerolophodon. The new genus Afrochoerodon is erected for it. Choerolophodon ngorora from Ngorora and Fort Ternan (Kenya), Choerolophodon zaltaniensis from Gebel Zelten (Libya) and Choerolophodon chioticus from Chios, Greece, should be transferred to the genus Afrochoerodon. Late Miocene specimens from Nakali, Kenya are probably referrable to the genus Choerolophodon. Fossils from Burji-Soyama (Ethiopia) hitherto assigned to Choerolophodon sp. are excluded from the subfamily Choerolophodontinae. 相似文献
13.
Tricholeiperia trinidadensis n. sp. from the small intestine of Natalus tumidirostris haymani and Natalus sp. in the Tamana caves, Trinidad, West Indies is described and illustrated. The species is separated from the other five species in the genus, namely, T. leiperi Travassos, 1935, T. proencai Travassos, 1937, T. carnegiensis Chitwood, 1938, T. pearsei Chitwood, 1938 and T. poeyi Barus & Valle, 1967. It is characterised by (i) the morphology of the cephalic vesicle which is umbrella shaped, asymmetrical and almost undivided, (ii) the shape and size of the alate, filiform spicules which have a short external alate branch near the pointed distal tip, (iii) the presence of a vulvar flap, (iv) the presence of a median notch on the posterior bursal margin, (v) the dorsal ray which divides distally each branch dividing again into three branches, and (vi) the lateral rays which have a common stem, the antero-lateral and medio-lateral, fused for most of their length, diverging distally and the shorter postero-lateral arising near the base of the other lateral rays. 相似文献
15.
Nine specimens of Apus affinis (J.E. Gray) were studied at Franceville, Haut-Ogooué Province, Republic of Gabon, for the presence of helminth parasites. Two cestode species of the family Dilepididae were recorded. Pseudangularia gonzalezi n. sp. is distinguished from the most similar species P. europaea Georgiev & Murai, 1993 by having elliptical cirrus-sac, longer vagina, longer rostellar sheath and greater diameter of suckers. An identification key to the species of the genus Pseudangularia Burt, 1938 is proposed. The present study is the first record of the genus Pseudangularia in the Afrotropical Region. Our study confirms that, in dilepidids with vaginal sclerites from swifts, breaking off the cirrus after copulation is a frequent phenomenon. The genus Gibsonilepis n. g. is erected as monotypic for Vitta swifti Singh, 1952 (originally described from the same host species in India) and Gibsonilepis swifti n. comb. is proposed. Gibsonilepis n. g. is distinguished from Vitta Burt, 1938 by its highly elongate rostellum, rostellar sheath much bigger than rostellum, relatively small rostellar hooks possessing strongly developed guard, disc-shaped suckers with weak peripheral musculature and flat or convex central part, long and well-expressed neck, highly lobed two-winged ovary (lobes rounded) and presence of a band consisting of rows of spine-like microtriches along posterior margin of each proglottis. This is the first record of G. swifti in the Afrotropical Region. The separation of G. swifti from the genus Vitta (parasites of swallows) suggests that, contrary to previous opinions, no dilepidid genera are shared by Apodidae (swifts) and Hirundinidae (swallows). 相似文献
16.
Two species of Parvicapsula were found in the kidney tubules and the urinary bladder of 2 pleuronectid fish from the northern Oresund, Denmark. The coelozoic, spherical, disporic trophozoites of both species are 10 to 12 pm in diameter. The myxospores of both species are elongate, asymmetrical and slightly curved, and have spherical polar capsules. Parvicapsula bicornis n. sp. (6-8 x 5-6 microm, polar capsule 2.5 microm in diameter) occurs in Pleuronectes platessa. The polar capsules of P. bicornis are arranged symmetrically on either side of the longitudinal axis and its spores differ from other species of Parvicapsula in having two 2-3 microm long posterior processes of different length. Parvicapsula limandae n. sp. (8-11 x 4-5 pm, polar capsule 1.6 microm in diameter) is found in Limanda limanda. The polar capsules are arranged along the longitudinal axis. It differs from Parvicapsula unicornis Kabata, 1962, recorded from L. limanda, in the arrangement of the polar capsules and in the absence of a posterior horn-like projection. The phylogenetic relationship between P. bicornis n. sp., P. limandae n. sp. and other Parvicapsula spp. was examined with their partial small subunit rDNA (SSU rDNA) sequences. P. limandae n. sp. and P. asymmetrica appear to be closely related, while P. bicornis n. sp. and P. minibicornis are the most divergent members of the genus. 相似文献
17.
Catadiscus pomaceae sp. n. from the intestine of the prosobranch mollusc Pomacea canaliculata (Lamarck, 1801), is described. The host snail was collected from a lenitic biotope belonging to the Riachuelo basin (Corrientes province, Argentina) during 1985-1986. So far the species of the genus Catadiscus Cohn, 1904 have been recorded in amphibians and reptiles. This is the first instance of a species of that genus parasitizing a mollusc. 相似文献
18.
粪检云南省昆明市太平镇捕获的31只高原姬鼠Apodemus chevrieri,在9只高原姬鼠中共发现了2种艾美球虫,自然感染率为29%,其中1种被命名为新种:齐氏艾美球虫Eimeria chevrieri sp.nov.。齐氏艾美球虫孢子化的卵囊椭圆形,大小为21·2μm×16·3μm(22·2~19·7μm×17·3~15·6μm)。卵囊壁光滑,单层,厚约1·0μm;无胚孔和卵囊余体。有1~2个极体,极体形状不规则,直径1·0~2·0μm。卵圆形的孢子囊大小为11·2μm×7·5μm(12·3~10·3μm×8·3~6·8μm),有孢子囊余体,且主要分布在2个子孢子的中间,斯氏体扁豆形,大小为1·0μm×0·3μm,亚斯氏体亚球形,大小为2·5μm×1·5μm。子孢子在孢子囊里面头尾相接,在其宽端有1个明显的反光体,直径约3μm。模式标本保存在云南大学标本馆。齐氏艾美球虫,新种Eimeria chevrieri sp·nov.(图1~2,4)寄生于姬鼠属,具有椭圆形的卵囊,卵囊壁具有光滑、无色、单层特点的艾美球虫有3种:E.gomurica Musaev and Veisov,1963,E.kaunensis Arnastauskiene et al.,1978和E.gandobica Musaev and Veisov,1965。E.gomurica、E.kaunensis与本种的主要区别是卵囊较小且有卵囊余体;E.gandobica与本种的主要区别是卵囊呈宽椭圆形,卵囊和孢子囊较小(19·0μm×16·8μmvs·21·2μm×16·3μm;8·0μm×5·0μmvs·11·2μm×7·5μm),孢子囊余体少,无反光体和亚斯氏体。寄生于姬鼠属,具有椭圆形的卵囊,卵囊壁具有光滑、2层特点的艾美球虫有3种:E.alorani Hurková et al.,2005、E.apodemi Pell啨rdy1974和E.zaurica Musaev and Veisov,1965。E.zaurica与本种的主要区别是具有卵囊余体;E.alorani的卵囊和孢子囊比本种大的多(26·9μm×19·3μmvs.21·2μm×16·3μm),且其孢子囊余体形成一个直径约4~5μm的球状结构;E.apodemi的孢子化卵囊呈宽椭圆形,经常不对称,无极体和斯氏体。该种区别其它种的关键特征是:1)孢子化卵囊椭圆形,卵囊壁光滑、单层、无色;2)有极体;3)孢子囊有亚斯氏体。模式标本,含孢子化卵囊的齐氏姬鼠粪便保存在云南大学生物系,标本编号:2006047;齐氏姬鼠标本保存于云南大学标本馆,标本编号20060081。词源:种名源自宿主种名。 相似文献
20.
Male and female imagines, and pupal exuviae of Cricotopus ( C.) nevadensis sp. n. are described. A discussion on the systematic position, a differential diagnosis and notes on the ecology of this new species are given. 相似文献
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