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Bill S. Hansson - One of the best experts on this subject based on the ideXlab platform.
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Receptor neuron responses to potential sex pheromone components in the caddisfly Rhyacophila nubila (Trichoptera: Rhyacophilidae).
Journal of insect physiology, 1998Co-Authors: Mattias C. Larsson, Bill S. HanssonAbstract:Olfactory single sensillum responses of male and female caddisflies Rhyacophila nubila (Trichoptera: Rhyacophilidae) were examined with the tungsten penetration technique to investigate the presence of receptor neurons tuned to potential sex pheromone components. The compounds tested in the experiment were heptan-2-one, nonan-2-one, (R)-heptan-2-ol, and (R)-nonan-2-ol, which have all been found to be present in female abdominal glands, plus the two antipodes (S)-heptan-2-ol and (S)-nonan-2-ol. Four types of receptor neurons were found in equal proportions in males and females. One type responded primarily to heptan-2-one. A second type responded primarily to (R)-heptan-2-ol and a third type primarily to its enantiomer (S)-heptan-2-ol. The fourth type of receptor neuron responded to nonan-2-one, (R)-nonan-2-one, and (S)-nonan-2-ol, with a bias to nonan-2-one. The receptor neurons responding to the tested compounds made up a great majority of the contacted neurons in both males and females.
Mattias C. Larsson - One of the best experts on this subject based on the ideXlab platform.
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Receptor neuron responses to potential sex pheromone components in the caddisfly Rhyacophila nubila (Trichoptera: Rhyacophilidae).
Journal of insect physiology, 1998Co-Authors: Mattias C. Larsson, Bill S. HanssonAbstract:Olfactory single sensillum responses of male and female caddisflies Rhyacophila nubila (Trichoptera: Rhyacophilidae) were examined with the tungsten penetration technique to investigate the presence of receptor neurons tuned to potential sex pheromone components. The compounds tested in the experiment were heptan-2-one, nonan-2-one, (R)-heptan-2-ol, and (R)-nonan-2-ol, which have all been found to be present in female abdominal glands, plus the two antipodes (S)-heptan-2-ol and (S)-nonan-2-ol. Four types of receptor neurons were found in equal proportions in males and females. One type responded primarily to heptan-2-one. A second type responded primarily to (R)-heptan-2-ol and a third type primarily to its enantiomer (S)-heptan-2-ol. The fourth type of receptor neuron responded to nonan-2-one, (R)-nonan-2-one, and (S)-nonan-2-ol, with a bias to nonan-2-one. The receptor neurons responding to the tested compounds made up a great majority of the contacted neurons in both males and females.
Steffen U Pauls - One of the best experts on this subject based on the ideXlab platform.
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gene flow and diversification in himalopsyche martynovi species complex trichoptera Rhyacophilidae in the hengduan mountains
Biology, 2021Co-Authors: Xiling Deng, Adrien Favre, Emily Moriarty Lemmon, Alan R Lemmon, Steffen U PaulsAbstract:The Hengduan Mountains are one of the most species-rich mountainous areas in the world. The origin and evolution of such a remarkable biodiversity are likely to be associated with geological or climatic dynamics, as well as taxon-specific biotic processes (e.g., hybridization, polyploidization, etc.). Here, we investigate the mechanisms fostering the diversification of the endemic Himalopsyche martynovi complex, a poorly known group of aquatic insects. We used multiple allelic datasets generated from 691 AHE loci to reconstruct species and RaxML phylogenetic trees. We selected the most reliable phylogenetic tree to perform network and gene flow analyses. The phylogenetic reconstructions and network analysis identified three clades, including H. epikur, H. martynovi sensu stricto and H. cf. martynovi. Himalopsyche martynovi sensu stricto and H. cf. martynovi present an intermediate morphology between H. epikur and H. viteceki, the closest known relative to the H. martynovi-complex. The gene flow analysis revealed extensive gene flow among these lineages. Our results suggest that H. viteceki and H. epikur are likely to have contributed to the evolution of H. martynovi sensu stricto and H. cf. martynovi via gene flow, and thus, our study provides insights in the diversification process of a lesser-known ecological group, and hints at the potential role of gene flow in the emergence of biological novelty in the Hengduan Mountains.
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a preliminary phylogeny of Rhyacophilidae with reference to fansipangana and the monophyly of rhyacophila
Zoosymposia, 2019Co-Authors: Julianne E Mclaughlin, Wolfram Mey, Paul B Frandsen, Steffen U PaulsAbstract:The phylogeny of Rhyacophilidae was explored with 28S ribosomal RNA (rRNA) and Cytochrome Oxidase Subunit I (COI) mitochondrial DNA (mtDNA). Eighty one rhyacophilids were included in the analysis. We found that although Rhyacophilidae was recovered as monophyletic, intrafamilial relationships are not well-resolved using this dataset. Bootstrap support was poor for intrageneric relationships and additional data will be required to present a more robust hypothesis. The recovered phylogeny places Fansipangana as the sister taxon of the rest of Rhyacophilidae. We found that Himalopsyche was nested inside the genus Rhyacophila with the verrula group sister to Himalopsyche and remaining Rhyacophila. These results and possible relationships should be tested with a more extensive data set.
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molecular association and morphological characterisation of himalopsyche larval types trichoptera Rhyacophilidae
ZooKeys, 2018Co-Authors: Anna E Hjalmarsson, Wolfram Graf, Simon Vitecek, Sonja C Jahnig, Steffen U PaulsAbstract:Banks, 1940 (Trichoptera, Rhyacophilidae) is a genus of caddisflies inhabiting mountain and alpine environments in Central and East Asia and the Nearctic. Of 53 known species, only five species have been described previously in the aquatic larval stage. We perform life stage association using three strategies (GMYC, PTP, and reciprocal monophyly) based on fragments of two molecular markers: the nuclear CAD, and the mitochondrial COI gene. A total of 525 individuals from across the range of (Himalayas, Hengduan Shan, Tian Shan, South East Asia, Japan, and western North America) was analysed and 32 operational taxonomic units (OTUs) in our dataset delimited. Four distinct larval types of are uncovered, and these are defined as the type, type, type, and type and a comparative morphological characterisation of the larval types is presented. The larval types differ in a number of traits, most prominently in their gill configuration, as well as in other features such as setal configuration of the pronotum and presence/absence of accessory hooks of the anal prolegs.
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the larva of rhyacophila ferox graf 2006 trichoptera Rhyacophilidae from the eastern alps carinthia austria
Aquatic Insects, 2009Co-Authors: Wolfram Graf, Steffen U Pauls, Johann WaringerAbstract:The hitherto unknown larva of Rhyacophila ferox Graf, 2006, is described and discussed in the context of contemporary Rhyacophilidae keys. In addition, zoogeographical and ecological notes are incl...
Johann Waringer - One of the best experts on this subject based on the ideXlab platform.
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the larva of rhyacophila hartigi malicky 1971 including a discriminatory matrix to the italian rhyacophila larvae with tufted multifilament gills Rhyacophilidae trichoptera
Zootaxa, 2020Co-Authors: Johann Waringer, Hans MalickyAbstract:The collection of adults and larvae sampled at the same site on Sicily and the absence of confusing species at the sampling location enabled a description of the hitherto unknown larva of Rhyacophila hartigi Malicky 1971 (Trichoptera: Rhyacophilidae). We present information on the morphology of the larva and illustrate the most important diagnostic features. This dataset is included in a discriminatory matrix of the ten other Rhyacophila larvae with tufted multifilament gills of Italy described so far. Species can be separated by coloration patterns of head and pronotum, and by anal claw morphology; however, separation of the R. dorsalis-palmeni-simulatrix-vulgaris species quartet is not yet possible. Rhyacophila hartigi is restricted to the southern Apennine Peninsula and the island of Sicily (Cianficconi et al. 2008).
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identification and morphology of a rhyacophilid caddisfly larva from cyprus rhyacophila aphrodite malicky 1975
Zootaxa, 2019Co-Authors: Johann Waringer, Hans MalickyAbstract:Rhyacophila aphrodite Malicky 1975 is a micro-endemic species of Cyprus and the only rhyacophilid caddisfly recorded on this island. This paper describes the previously unknown larva of this species. Information on the morphology of the final larval instar is given, and the most important diagnostic features are illustrated. In the context of existing Rhyacophilidae identification keys, the larva of R. aphrodite belongs to the group fitted with one single-filament gill on each side of the meso- and metathoraces and one four-filament gill on each side of abdominal segments I to VIII. In addition, a sword process is present on each anal proleg. The distal anal claw tooth is perpendicular to the longitudinal axis of the anal claw and shorter than half of the anal claw width at the distal tooth insertion.
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the larvae of rhyacophila rougemonti mclachlan 1880 rhyacophila trifasciata mosely 1930 rhyacophila pallida mosely 1930 and rhyacophila tarda giudicelli 1968 trichoptera Rhyacophilidae including a discriminatory matrix to the rhyacophila larvae with
Zootaxa, 2018Co-Authors: Johann Waringer, Hans MalickyAbstract:This paper gives a description of the hitherto unknown or poorly known larvae of Rhyacophila rougemonti McLachlan 1880, R. trifasciata Mosely 1930, R. pallida Mosely 1930, and R. tarda Giudicelli 1968 (Trichoptera: Rhyacophilidae). Information on the morphology of the larvae is provided, and the most important diagnostic features are figured. This dataset is included in a discriminatory matrix of the Rhyacophila larvae with tetrafilament (i.e., four-filament) abdominal gills of Italy and Corsica described so far; only the species pair Rhyacophila pallida / R. tarda in Corsica remains unresolved. Larvae can be separated by the number of metathoracic gill filaments and anal proleg morphology, and by distribution patterns. Endemism is high in the species quartet described in the present paper: Rhyacophila pallida and R. trifasciata are Sardo-Corsican endemic species, R. tarda is restricted to Corsica, and R. rougemonti is a South-Apennine endemic species.
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Larval morphology and identification of Rhyacophila meyeri McLachlan 1879 (Trichoptera: Rhyacophilidae)
Zootaxa, 2016Co-Authors: Johann Waringer, Simon Vitecek, Wolfram GrafAbstract:This paper describes the previously unknown larva of Rhyacophila meyeri McLachlan 1879. Information on the morphology of the 5th larval instar is given, and the most important diagnostic features are illustrated. In the context of existing identification keys the larva of R . meyeri keys together with R. stigmatica (Kolenati 1859). The species pair can be separated by differences in the setation pattern at the anterior pronotal border and maximum head width. With respect to zoogeography, Rhyacophila meyeri is reported from Switzerland and northern Italy whereas R. stigmatica is restricted to the Austrian, German and Swiss Alps and northern Slovenia (Cianficconi 2002; Graf et al . 2008; Lubini-Ferlin & Vicentini 2005; Malicky 2009; Robert 2004).
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the larva of rhyacophila balcanica radovanovic 1953 trichoptera Rhyacophilidae with notes on ecology
Zootaxa, 2015Co-Authors: Ioannis Karaouzas, Mladen Kucinic, Wolfram Graf, Ivan Vuckovic, Johann WaringerAbstract:The previously unknown larva of Rhyacophila balcanica Radovanovic 1953 is described. The diagnostic features of the species are listed and illustrated and some information on its ecology and distribution is included. In addition, diagnostic characters for larvae of the known Greek Rhyacophila species are provided.
Wolfram Graf - One of the best experts on this subject based on the ideXlab platform.
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molecular association and morphological characterisation of himalopsyche larval types trichoptera Rhyacophilidae
ZooKeys, 2018Co-Authors: Anna E Hjalmarsson, Wolfram Graf, Simon Vitecek, Sonja C Jahnig, Steffen U PaulsAbstract:Banks, 1940 (Trichoptera, Rhyacophilidae) is a genus of caddisflies inhabiting mountain and alpine environments in Central and East Asia and the Nearctic. Of 53 known species, only five species have been described previously in the aquatic larval stage. We perform life stage association using three strategies (GMYC, PTP, and reciprocal monophyly) based on fragments of two molecular markers: the nuclear CAD, and the mitochondrial COI gene. A total of 525 individuals from across the range of (Himalayas, Hengduan Shan, Tian Shan, South East Asia, Japan, and western North America) was analysed and 32 operational taxonomic units (OTUs) in our dataset delimited. Four distinct larval types of are uncovered, and these are defined as the type, type, type, and type and a comparative morphological characterisation of the larval types is presented. The larval types differ in a number of traits, most prominently in their gill configuration, as well as in other features such as setal configuration of the pronotum and presence/absence of accessory hooks of the anal prolegs.
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Larval morphology and identification of Rhyacophila meyeri McLachlan 1879 (Trichoptera: Rhyacophilidae)
Zootaxa, 2016Co-Authors: Johann Waringer, Simon Vitecek, Wolfram GrafAbstract:This paper describes the previously unknown larva of Rhyacophila meyeri McLachlan 1879. Information on the morphology of the 5th larval instar is given, and the most important diagnostic features are illustrated. In the context of existing identification keys the larva of R . meyeri keys together with R. stigmatica (Kolenati 1859). The species pair can be separated by differences in the setation pattern at the anterior pronotal border and maximum head width. With respect to zoogeography, Rhyacophila meyeri is reported from Switzerland and northern Italy whereas R. stigmatica is restricted to the Austrian, German and Swiss Alps and northern Slovenia (Cianficconi 2002; Graf et al . 2008; Lubini-Ferlin & Vicentini 2005; Malicky 2009; Robert 2004).
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the larva of rhyacophila balcanica radovanovic 1953 trichoptera Rhyacophilidae with notes on ecology
Zootaxa, 2015Co-Authors: Ioannis Karaouzas, Mladen Kucinic, Wolfram Graf, Ivan Vuckovic, Johann WaringerAbstract:The previously unknown larva of Rhyacophila balcanica Radovanovic 1953 is described. The diagnostic features of the species are listed and illustrated and some information on its ecology and distribution is included. In addition, diagnostic characters for larvae of the known Greek Rhyacophila species are provided.
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the larva of rhyacophila ferox graf 2006 trichoptera Rhyacophilidae from the eastern alps carinthia austria
Aquatic Insects, 2009Co-Authors: Wolfram Graf, Steffen U Pauls, Johann WaringerAbstract:The hitherto unknown larva of Rhyacophila ferox Graf, 2006, is described and discussed in the context of contemporary Rhyacophilidae keys. In addition, zoogeographical and ecological notes are incl...