1,913 research outputs found
New host record for \u3ci\u3eEntylia carinata\u3c/i\u3e (Forster) (Hemiptera: Membracidae)
Yacon, Smallanthus sonchifolius (Poepp.) H. Rob (Asteraceae), is recorded as a new host plant for Entylia carinata (Forster) (Hemiptera: Membracidae) in Mt. Holly, NC. Adults, nymphs, and attending ants were found on numerous plants
New host record for \u3ci\u3eEntylia carinata\u3c/i\u3e (Forster) (Hemiptera: Membracidae)
Yacon, Smallanthus sonchifolius (Poepp.) H. Rob (Asteraceae), is recorded as a new host plant for Entylia carinata (Forster) (Hemiptera: Membracidae) in Mt. Holly, NC. Adults, nymphs, and attending ants were found on numerous plants
First records of Myxomycetes associated with members of the Cactaceae in Australia
Context. Cacti are endemic to North and South America, but numerous species have been spread all over the world after Europeans visited the Americas. Their global spread has impacted various aspects of terrestrial ecosystems, including the distributions of succulenticolous myxomycetes. Aims. In this study, we examine the association of myxomycetes (also known as plasmodial slime moulds or myxogastrids) with three introduced species of cacti in Australia. Methods. Using the moist chamber culturing technique we prepared 33 cultures from dead portions of three species of cacti collected in New South Wales and Queensland. Key results. Eighty-eight percent of moist chamber cultures yielded evidence of myxomycetes (either plasmodia or fruiting bodies). A total of 12 species representing six genera were recorded. Physarum compressum was the most abundant species (appearing in 20 of the 33 cultures), with species such as Perichaena depressa also relatively common. We also report the first records of Perichaena luteola in Australia. Conclusions. This is the first study to investigate the assemblages of myxomycetes associated with members of the Cactaceae in Australia, and we highlight the occurrence of succulenticolous myxomycetes on the continent. Implications. This study leads to a better understanding of the biogeography, distribution and ecology of succulenticolous myxomycetes. We also add a new species record for Australia
Observations of Binary Stars with the Differential Speckle Survey Instrument. V. Toward an Empirical Metal-Poor Mass-Luminosity Relation
In an effort to better understand the details of the stellar structure and
evolution of metal poor stars, the Gemini North telescope was used on two
occasions to take speckle imaging data of a sample of known spectroscopic
binary stars and other nearby stars in order to search for and resolve close
companions. The observations were obtained using the Differential Speckle
Survey Instrument, which takes data in two filters simultaneously. The results
presented here are of 90 observations of 23 systems in which one or more
companions was detected, and 6 stars where no companion was detected to the
limit of the camera capabilities at Gemini. In the case of the binary and
multiple stars, these results are then further analyzed to make first orbit
determinations in five cases, and orbit refinements in four other cases. Mass
information is derived, and since the systems span a range in metallicity, a
study is presented that compares our results with the expected trend in total
mass as derived from the most recent Yale isochrones as a function of metal
abundance. These data suggest that metal-poor main-sequence stars are less
massive at a given color than their solar-metallicity analogues in a manner
consistent with that predicted from the theory
Animal-fungal interactions 2: First report of mycophagy by the Eastern European Hedgehog, Erinaceus concolor Martin, 1837 (Mammalia: Eulipotyphla: Erinaceidae)
Mycophagy (fungivory) performs numerous important ecosystem functions for fungi, plants, and animals. Fungi serve as food for diverse mammals, ranging from bears, Ursus spp., to shrews, Sorex spp. However, among the many mammals reported to eat fungi, hedgehogs and other insectivores have been poorly studied. Based on microscopic examination of a fecal sample collected from an Eastern European Hedgehog (Erinaceus concolor) near Ula-MuÄŸla, Turkey, we provide the first confirmed evidence of mycophagy by hedgehogs and review the literature on hedgehog mycophagy
Australasian Sequestrate Fungi 19: Hysterangium colossum sp. nov.
Hysterangium colossum sp. nov, with extraordinarily large basidiomata for the genus, is described from dry Eucalyptus woodlands in the Australian Capital Territory and southeastern New South Wales. It typically grows in confluent clusters and has a thick peridium often invaginated into the gleba
Animal-fungal interactions 3: first report of mycophagy by the African Brush-tailed Porcupine Atherurus africanus Gray, 1842 (Mammalia: Rodentia: Hystricidae)
Fungi are an important food source for a diversity of animals throughout the world, but these associations have been poorly studied in Africa. In this short note based on an observation from the Congo Basin of Cameroon, we provide the first report of mycophagy by the African brush-tailed porcupine and the first account of the hypogeous fungal genus Elaphomyces being eaten by an animal in Africa
Observations of Binary Stars with the Differential Speckle Survey Instrument. VII. Measures from 2010 September to 2012 February at the WIYN Telescope
We report on speckle observations of binary stars carried out at the WIYN
Telescope over the period from September 2010 through February 2012, providing
relative astrometry for 2521 observations of 883 objects, 856 of which are
double stars and 27 of which are triples. The separations measured span a range
of 0.01 to 1.75 arc seconds. Wavelengths of 562 nm, 692 nm, and 880 nm were
used, and differential photometry at one or more of these wavelengths is
presented in most cases. Sixty-six components were resolved for the first time.
We also estimate detection limits at 0.2 and 1.0 arc seconds for high-quality
observations in cases where no companion was seen, a total of 176 additional
objects. Detection limits vary based on observing conditions and
signal-to-noise ratio, but are approximately 4 magnitudes at 0.2 arc seconds
and 6 magnitudes at 1.0 arc seconds on average. Analyzing the measurement
precision of the data set, we find that the individual separations obtained
have linear measurement uncertainties of approximately 2 mas, and photometry is
uncertain to approximately 0.1 magnitudes in general. This work provides
fundamental, well-calibrated data for future orbit and mass determinations, and
we present three first orbits and total mass estimates of nearby K-dwarf
systems as examples of this potential
Turkish truffles 2: eight new records from Anatolia
Eight truffle taxa are identified as new records for Turkey: two representing Ascomycota (Tuber ferrugineum, Tuber puberulum) and six representing Basidiomycota (Hymenogaster rehsteineri, Hysterangium calcareum, Leucophleps aculeatispora, Melanogaster macrosporus, Sclerogaster compactus, Sclerogaster hysterangioides). We also report new localities within Turkey for Tuber borchii and Melanogaster ambiguus
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Morchella australiana sp. nov., an apparent Australian endemic from New South Wales and Victoria
An abundant fruiting of a black morel was encountered in temperate northwestern New South Wales (NSW), Australia, during a mycological survey in Sep 2010. The site was west of the Great Dividing Range in a young, dry sclerophyll forest dominated by Eucalyptus and Callitris north of Coonabarabran in an area known as the Pilliga Scrub. Although the Pilliga Scrub is characterized by frequent and often large, intense wildfires, the site showed no sign of recent fire, which suggests this species is not a postfire morel. Caps of the Morchella elata-like morel were brown with blackish ridges supported by a pubescent stipe that became brown at maturity. Because no morel has been described as native to Australia, the collections were subjected to multilocus molecular phylogenetic and morphological analyses to assess its identity. Results of these analyses indicated that our collection, together with collections from NSW and Victoria, represented a novel, genealogically exclusive lineage, which is described and illustrated here as Morchella australiana T. F. Elliott, Bougher, O’Donnell & Trappe, sp. nov.Keywords: Morchellaceae,
Callitris,
Morels,
Pezizales,
Eucalyptus,
Ascomycota,
Western Australi
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