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Aphelenchoides nechaleos n. sp. and A. paranechaleos n. sp. (Nematoda : Aphelenchoididae) from rice plants
No full text#Aphelenchoides nechaleos n. sp. et #A. paranechaleos n. sp. provenant à l'origine de tiges de riz de Sierra Leone et du Vietnam, respectivement, sont décrits et figurés. Leur aspect général et leur biologie sont très semblables à ceux de #A. besseyi$ Christie, 1942, mais les femelles des deux espèces nouvelles ne possèdent qu'un seul mucron caudal, simple, et un sac post-vulvaire plus long ; les spicules sont plus robustes et comportent une extrémité en crochet ; le mucron terminal de la queue du mâle est semblable à celui de la femelle. Ces deux nouvelles espèces sont presque identiques, ne se séparant que par la forme de la queue de la femelle et la courbure des spicules. L'une et l'autre espèces nagent vigoureusement dans l'eau, peuvent être facilement élevées et, dans une certaine limite, survivre à la dessication. (Résumé d'auteur
A new species of Aleurolobus Quaintance et Baker (Homoptera, Aleyrodidae) from Southern Europe.
Full text linkAleurolobus teucrii n. sp. is described from southern Italy and the Maltese Islands (Central Mediterranean). The species seems to be monophagous on Teucrium fruticans L. A key to the European species of this genus (A. niloticus Priesner et Hosny, A. olivinus (Silvestri), A. wunni (Ryberg) and A. teucrii n. sp.) is provided.peer-reviewe
Goussia trichogasteri n. sp. (Apicomplexa: Eimenidae) infecting the aquarium-cultured golden gourami Trichogaster trichopterus trichopterus
No full textGoussia trichogasteri n. sp. is described from the gut of the aquarium fish Trichogaster trichopterus trichopterus. Gamogonic stages develop epicellularly in the gut epithelium. Oocysts are shed in early stage of sporulation. Sporulated oocysts are characterised by having centrally locating oocyst residua. The whole development of the species takes place in the aquarium
Spore ornamentation of Haplosporidium hinei n. sp. (Haplosporidia) in pearl oysters Pinctada maxima (Jameson, 1901)
Full text linkAn infection of pearl oysters, Pinctada maxima, attributed to a Haplosporidium sp. by Hine and Thorne (1998) has been detected on 3 occasions and is considered to represent a serious concern to the pearling industry in Australia. The spore ornamentation of the parasite was determined by scanning electron microscopy and transmission electron microscopy. Spores of the parasite were pleomorphic, or elongated 3.5-4 mcm x 2.5-3.0 mcm in size. Two filaments were wound around the spore and originated from 2 'knob-like' posterior thickenings. Both filaments passed up one side of the spore together until just below the operculum whereupon each split and passed obliquely under the lip of the opercula lid. Each filament wrapped around the spore 4 times. The posterior thickenings seem to appear late in the development of the spore and were composed of spore wall material. A second set of branching tubular filaments composed of a different material was observed on the spore body although not on mature spores possessing a 'knob-like' posterior thickening. The ornamentation on the spores of the pearl oyster parasite was unique amongst described haplosporidian species where spore ornamentation is known. The parasite is named in this manuscript as Haplosporidium hinei n. sp
Metadorylaimus pachylaimus N. gen., N. Sp.(Dorylaimoidea)
No full textMetadorylaimus pachylaimus n. gen., n. sp. from Makoka Farm, Ntondwa, Malawi is characterized by its flatly conical lip region, conspicuous thick-walled spear and the presence of a "mucro" in the subventral wall of the anterior part of the oesophagus. In other respects it resembles Eudorylaimus
Susceptibility of Compsus n. sp. to Beauveria bassiana (Bals.) Vuill and Metarhizium anisopliae (Metsch.) Sorokin
Full text linkSe evaluó la susceptibilidad de huevos, larvas y adultos de Compsus n sp. (Coleoptera: Curculionidae) a Beauveria bassiana (Bals.) Vuill (Bb) y Metarhizium anisopliae (Metsch.) Sorokin (Ma). Los experimentos se llevaron a cabo a 26ºC (promedio diurno) a 1470 msnm, se inoculó por aspersión directa sobre cada estado del insecto, utilizando concentraciones seriadas de 108 hasta 104 y un testigo con agua destilada estéril (ADE). Se usaron 10 repeticiones por tratamiento, la mortalidad se consideró durante 15 días. Un diseño completamente al azar fue analizado con la función GLM de SAS, además se hallaron TL50 por método gráfico y CL50 por método manual. Los resultados permiten concluir que existe susceptibilidad de los diferentes estados de Compsus n sp. a Bb y a Ma. Debido a los hongos se presentó la mayor mortalidad en larvas (hasta 100% con Bb y 92% con Ma; p0.0001); en adultos (p 0.0001) con 108 y 107. Para Ma se observó la menor mortalidad promedio de adultos (17 – 19%) comparado con Bb (44 – 27%). Hasta el último día de la observación se presentaron adultos muertos por efecto de los hongos. El hecho de que Bb y Ma puedan ser utilizados en los planes de MIP para control de Compsus n sp. es evidente, aunque su CL50 oscila entre las dos concentraciones más altas, se debe tener en cuenta que estos hongos poseen una amplia distribución y se resalta su especificidad hacia Compsus n sp. , esto permite aumentar su permanencia en campo y disminuir el número de aplicaciones en el tiempo con significativas reducciones en costos de manejo. / Abstract: The susceptibility of Compsus n sp. adults (Coleoptera: Curculionidae) to Beauveria bassiana (Bals.) Vuill (Bb) y Metarhizium anisopliae (Metsch.) Sorokin (Ma) was tested. The experiments were carried out on 26ºC (diurnal average) and 1470 meters above the sea level, the inoculation was made through direct spray to the insects in experimental units of five adults with serial concentrations of 108 until 104, and a test with sterile distilled water (SDW). Ten experimental units were used per treatment, the mortality was considered during fifteen days. A completely randomized design was analyzed with the GLM procedure by SAS, in addition LT50 were founded by graphic method and LC50 by manual method. The results permit to conclude that there is susceptibility of Compsus n sp. Stages tested to Bb and Ma. The major mortality was observed in larvae (up to 100% with Bb and 92% for Ma; p0.0001); in adults the mortality was because of the 108 and 107 concentrations of the fungi (p0.0001). The minor average mortality (17 - 19%) was observed for Ma in comparison with Bb (44 - 27%). Until the last day of observation there were dead adults because of the fungus effect. The fact that Bb and Ma can be used on IPM is evident. Its LC50 is between the two highest concentrations, but it must to be taken in account the fact that the fungus is specific to Compsus n sp. and widely distributed, this permit to increase its permanence on the field and decrease the number of applications through the time with significant reduction on management costs.Maestrí
PARORNIX ACUTA N. SP. (LEPIDOPTERA GRACILLARIIDAE)
Full text linkThe Author describes Parornix acuta n. sp., on the ground of some specimens coming from the north-eastern mediterranean region. Within the genus Parornix the species is recognizable only through the examination of the genitalia. They show some relationship only with P. finitimella Zeller. L'A. descrive Parornix acuta n. sp., in base ad alcuni esemplari provenienti dalla regione mediterranea nord-orientale. All'interno del genere Parornix la specie è individua- bile solo attraverso l'esame delle armature genitali. Esse mostrano qualche affinità solo con quelle di P. finitimella Zeller
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Aphelenchoides dactylocercus n. sp. and A. sacchari n. sp.(Nematoda: Aphelenchoidea)
No full textRESP-397
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