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Steffen U Pauls - One of the best experts on this subject based on the ideXlab platform.
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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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from the western alps across central europe postglacial recolonisation of the tufa stream specialist Rhyacophila pubescens insecta trichoptera
Frontiers in Zoology, 2011Co-Authors: Christine H M Engelhardt, Peter Haase, Steffen U PaulsAbstract:Background Dispersal rates, i.e. the effective number of dispersing individuals per unit time, are the product of dispersal capacity, i.e. a species physiological potential for dispersal, dispersal behaviour, i.e. the decision to leave a habitat patch in favour of another, and connectivity of occupied habitat. Thus, dispersal of species that are highly specialised to a certain habitat is limited by habitat availability. Species inhabiting very stable environments may also adopt a sedentary life-style. Both factors should lead to strong genetic differentiation in highly specialised species inhabiting stable environments. These two factors apply to our model species Rhyacophila pubescens a highly specialised freshwater insect that occurs in tufa springs, a very stable habitat.
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from the western alps across central europe postglacial recolonisation of the tufa stream specialist Rhyacophila pubescens insecta trichoptera
Frontiers in Zoology, 2011Co-Authors: Christine H M Engelhardt, Peter Haase, Steffen U PaulsAbstract:Dispersal rates, i.e. the effective number of dispersing individuals per unit time, are the product of dispersal capacity, i.e. a species physiological potential for dispersal, dispersal behaviour, i.e. the decision to leave a habitat patch in favour of another, and connectivity of occupied habitat. Thus, dispersal of species that are highly specialised to a certain habitat is limited by habitat availability. Species inhabiting very stable environments may also adopt a sedentary life-style. Both factors should lead to strong genetic differentiation in highly specialised species inhabiting stable environments. These two factors apply to our model species Rhyacophila pubescens a highly specialised freshwater insect that occurs in tufa springs, a very stable habitat. We examined the genetic population structure and phylogeography using range-wide mtCOI sequence and AFLP data from 333 individuals of R. pubescens. We inferred the location of Pleistocene refugia and postglacial colonisation routes of R. pubescens, and examined ongoing local differentiation. Our results indicate intraregional differentiation with a high number of locally endemic haplotypes, that we attributed to habitat specificity and low dispersal rates of R. pubescens. We observed high levels of genetic diversity south of the Alps and genetic impoverishment north of the Alps. Estimates of migrants placed the refugium and the source of the colonisation in the Dauphine Alps (SW Alps). This is the first example of an aquatic insect with a colonisation route along the western margin of the Alps to the Central European highlands. The study also shows that specialisation to a stable environment may have promoted a behavioural shift to decreased dispersal rates, leading to stronger local population differentiation than in less specialised aquatic insects. Alternatively, the occurrence of highly specialised tufa spring habitats may have been more widespread in the past, leading to range regression and fragmentation among present day R. pubescens populations.
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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...
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population genetic structure of the caddisfly Rhyacophila pubescens pictet 1834 north of the alps
Fundamental and Applied Limnology, 2008Co-Authors: Christine H M Engelhardt, Steffen U Pauls, Peter HaaseAbstract:In this study we analyse the genetic population structure of the caddisfly Rhyacophila pubescens, a montane aquatic insect with a Central European distribution range. The species exhibits an insular distribution pattern due to its strong binding to unimpaired tufa streams and thus to mountain ranges with calcareous geology. We examined sequence data (mtCOI) of 197 individuals from 33 sites of the northern part of the distribution range to elucidate whether genetic population structure reflects this insular distribution. 28 haplotypes were identified, one of which was central in the median-joining haplotype network, occurred all across the study area, and seemed to be ancestral to others. In almost every mountain we also found closely related, private haplotypes indicating recent differentiation processes. Exact tests of population differentiation and pairwise F ST values showed that most mountain ranges that were studied are significantly differentiated from one another, indicating limited gene flow between mountain ranges. Analysis of Molecular Variance (AMOVA) revealed that most variation was within (68.54 %) and among mountains (30.48 %, for both p < 0.0001), but not among major mountain ranges (0.98 %, p = 0.31). Analysis of demographic history inferred recent demographic expansion in every region of the study area and the entire data set. Together these results provide evidence that limited extant gene flow and isolation between populations are currently structuring the populations north of the Alps. We present different hypotheses how the present-day genetic pattern of R. pubescens could have developed from its contrasting pattern in the past.
Christine H M Engelhardt - One of the best experts on this subject based on the ideXlab platform.
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from the western alps across central europe postglacial recolonisation of the tufa stream specialist Rhyacophila pubescens insecta trichoptera
Frontiers in Zoology, 2011Co-Authors: Christine H M Engelhardt, Peter Haase, Steffen U PaulsAbstract:Background Dispersal rates, i.e. the effective number of dispersing individuals per unit time, are the product of dispersal capacity, i.e. a species physiological potential for dispersal, dispersal behaviour, i.e. the decision to leave a habitat patch in favour of another, and connectivity of occupied habitat. Thus, dispersal of species that are highly specialised to a certain habitat is limited by habitat availability. Species inhabiting very stable environments may also adopt a sedentary life-style. Both factors should lead to strong genetic differentiation in highly specialised species inhabiting stable environments. These two factors apply to our model species Rhyacophila pubescens a highly specialised freshwater insect that occurs in tufa springs, a very stable habitat.
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from the western alps across central europe postglacial recolonisation of the tufa stream specialist Rhyacophila pubescens insecta trichoptera
Frontiers in Zoology, 2011Co-Authors: Christine H M Engelhardt, Peter Haase, Steffen U PaulsAbstract:Dispersal rates, i.e. the effective number of dispersing individuals per unit time, are the product of dispersal capacity, i.e. a species physiological potential for dispersal, dispersal behaviour, i.e. the decision to leave a habitat patch in favour of another, and connectivity of occupied habitat. Thus, dispersal of species that are highly specialised to a certain habitat is limited by habitat availability. Species inhabiting very stable environments may also adopt a sedentary life-style. Both factors should lead to strong genetic differentiation in highly specialised species inhabiting stable environments. These two factors apply to our model species Rhyacophila pubescens a highly specialised freshwater insect that occurs in tufa springs, a very stable habitat. We examined the genetic population structure and phylogeography using range-wide mtCOI sequence and AFLP data from 333 individuals of R. pubescens. We inferred the location of Pleistocene refugia and postglacial colonisation routes of R. pubescens, and examined ongoing local differentiation. Our results indicate intraregional differentiation with a high number of locally endemic haplotypes, that we attributed to habitat specificity and low dispersal rates of R. pubescens. We observed high levels of genetic diversity south of the Alps and genetic impoverishment north of the Alps. Estimates of migrants placed the refugium and the source of the colonisation in the Dauphine Alps (SW Alps). This is the first example of an aquatic insect with a colonisation route along the western margin of the Alps to the Central European highlands. The study also shows that specialisation to a stable environment may have promoted a behavioural shift to decreased dispersal rates, leading to stronger local population differentiation than in less specialised aquatic insects. Alternatively, the occurrence of highly specialised tufa spring habitats may have been more widespread in the past, leading to range regression and fragmentation among present day R. pubescens populations.
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population genetic structure of the caddisfly Rhyacophila pubescens pictet 1834 north of the alps
Fundamental and Applied Limnology, 2008Co-Authors: Christine H M Engelhardt, Steffen U Pauls, Peter HaaseAbstract:In this study we analyse the genetic population structure of the caddisfly Rhyacophila pubescens, a montane aquatic insect with a Central European distribution range. The species exhibits an insular distribution pattern due to its strong binding to unimpaired tufa streams and thus to mountain ranges with calcareous geology. We examined sequence data (mtCOI) of 197 individuals from 33 sites of the northern part of the distribution range to elucidate whether genetic population structure reflects this insular distribution. 28 haplotypes were identified, one of which was central in the median-joining haplotype network, occurred all across the study area, and seemed to be ancestral to others. In almost every mountain we also found closely related, private haplotypes indicating recent differentiation processes. Exact tests of population differentiation and pairwise F ST values showed that most mountain ranges that were studied are significantly differentiated from one another, indicating limited gene flow between mountain ranges. Analysis of Molecular Variance (AMOVA) revealed that most variation was within (68.54 %) and among mountains (30.48 %, for both p < 0.0001), but not among major mountain ranges (0.98 %, p = 0.31). Analysis of demographic history inferred recent demographic expansion in every region of the study area and the entire data set. Together these results provide evidence that limited extant gene flow and isolation between populations are currently structuring the populations north of the Alps. We present different hypotheses how the present-day genetic pattern of R. pubescens could have developed from its contrasting pattern in the past.
Peter Haase - One of the best experts on this subject based on the ideXlab platform.
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from the western alps across central europe postglacial recolonisation of the tufa stream specialist Rhyacophila pubescens insecta trichoptera
Frontiers in Zoology, 2011Co-Authors: Christine H M Engelhardt, Peter Haase, Steffen U PaulsAbstract:Background Dispersal rates, i.e. the effective number of dispersing individuals per unit time, are the product of dispersal capacity, i.e. a species physiological potential for dispersal, dispersal behaviour, i.e. the decision to leave a habitat patch in favour of another, and connectivity of occupied habitat. Thus, dispersal of species that are highly specialised to a certain habitat is limited by habitat availability. Species inhabiting very stable environments may also adopt a sedentary life-style. Both factors should lead to strong genetic differentiation in highly specialised species inhabiting stable environments. These two factors apply to our model species Rhyacophila pubescens a highly specialised freshwater insect that occurs in tufa springs, a very stable habitat.
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from the western alps across central europe postglacial recolonisation of the tufa stream specialist Rhyacophila pubescens insecta trichoptera
Frontiers in Zoology, 2011Co-Authors: Christine H M Engelhardt, Peter Haase, Steffen U PaulsAbstract:Dispersal rates, i.e. the effective number of dispersing individuals per unit time, are the product of dispersal capacity, i.e. a species physiological potential for dispersal, dispersal behaviour, i.e. the decision to leave a habitat patch in favour of another, and connectivity of occupied habitat. Thus, dispersal of species that are highly specialised to a certain habitat is limited by habitat availability. Species inhabiting very stable environments may also adopt a sedentary life-style. Both factors should lead to strong genetic differentiation in highly specialised species inhabiting stable environments. These two factors apply to our model species Rhyacophila pubescens a highly specialised freshwater insect that occurs in tufa springs, a very stable habitat. We examined the genetic population structure and phylogeography using range-wide mtCOI sequence and AFLP data from 333 individuals of R. pubescens. We inferred the location of Pleistocene refugia and postglacial colonisation routes of R. pubescens, and examined ongoing local differentiation. Our results indicate intraregional differentiation with a high number of locally endemic haplotypes, that we attributed to habitat specificity and low dispersal rates of R. pubescens. We observed high levels of genetic diversity south of the Alps and genetic impoverishment north of the Alps. Estimates of migrants placed the refugium and the source of the colonisation in the Dauphine Alps (SW Alps). This is the first example of an aquatic insect with a colonisation route along the western margin of the Alps to the Central European highlands. The study also shows that specialisation to a stable environment may have promoted a behavioural shift to decreased dispersal rates, leading to stronger local population differentiation than in less specialised aquatic insects. Alternatively, the occurrence of highly specialised tufa spring habitats may have been more widespread in the past, leading to range regression and fragmentation among present day R. pubescens populations.
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population genetic structure of the caddisfly Rhyacophila pubescens pictet 1834 north of the alps
Fundamental and Applied Limnology, 2008Co-Authors: Christine H M Engelhardt, Steffen U Pauls, Peter HaaseAbstract:In this study we analyse the genetic population structure of the caddisfly Rhyacophila pubescens, a montane aquatic insect with a Central European distribution range. The species exhibits an insular distribution pattern due to its strong binding to unimpaired tufa streams and thus to mountain ranges with calcareous geology. We examined sequence data (mtCOI) of 197 individuals from 33 sites of the northern part of the distribution range to elucidate whether genetic population structure reflects this insular distribution. 28 haplotypes were identified, one of which was central in the median-joining haplotype network, occurred all across the study area, and seemed to be ancestral to others. In almost every mountain we also found closely related, private haplotypes indicating recent differentiation processes. Exact tests of population differentiation and pairwise F ST values showed that most mountain ranges that were studied are significantly differentiated from one another, indicating limited gene flow between mountain ranges. Analysis of Molecular Variance (AMOVA) revealed that most variation was within (68.54 %) and among mountains (30.48 %, for both p < 0.0001), but not among major mountain ranges (0.98 %, p = 0.31). Analysis of demographic history inferred recent demographic expansion in every region of the study area and the entire data set. Together these results provide evidence that limited extant gene flow and isolation between populations are currently structuring the populations north of the Alps. We present different hypotheses how the present-day genetic pattern of R. pubescens could have developed from its contrasting pattern in the past.
Johann Waringer - One of the best experts on this subject based on the ideXlab platform.
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the larva of Rhyacophila albardana mclachlan 1879 including a discriminatory matrix to the Rhyacophila larvae with comb shaped gills of austria germany and switzerland rhyacophilidae trichoptera
Zootaxa, 2021Co-Authors: Armin Weinzierl, Hans Malicky, Johann WaringerAbstract:Final instar larvae collected in the Risbach (Isar catchment, Bavaria) were positively associated with adults of Rhyacophila albardana by barcoding; final instar larvae and adults of this species also were collected at the same time and site in the Lech River (Austria) in the absence of confusing species. These collections and associations enabled a description of the hitherto unknown larva of this species. 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 other larvae with comb-shaped gills (Rhyacophila HyperRhyacophila Group) known so far from Austria, Germany, and Switzerland. Species can be separated by coloration patterns of the head and prosternum morphology. Rhyacophila albardana is known from Austria, France, Germany, Italy, and Switzerland (Neu et al. 2018).
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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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The larva of Rhyacophila palmeni McLachlan 1879 (Trichoptera: Rhyacophilidae) from Greece and Kosovo with notes on ecology and zoogeography including a key to the known Greek Rhyacophila larvae.
Zootaxa, 2018Co-Authors: Ioannis Karaouzas, Halil Ibrahimi, Johann WaringerAbstract:The larva of Rhyacophila palmeni McLachlan 1879 is described, based on material from Greece and Kosovo. The diagnostic features of the species are discussed and illustrated, and some information on its ecology and distribution are included. In addition, diagnostic characters for larvae of the known Greek Rhyacophila species are provided.
Hans Malicky - One of the best experts on this subject based on the ideXlab platform.
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the larva of Rhyacophila albardana mclachlan 1879 including a discriminatory matrix to the Rhyacophila larvae with comb shaped gills of austria germany and switzerland rhyacophilidae trichoptera
Zootaxa, 2021Co-Authors: Armin Weinzierl, Hans Malicky, Johann WaringerAbstract:Final instar larvae collected in the Risbach (Isar catchment, Bavaria) were positively associated with adults of Rhyacophila albardana by barcoding; final instar larvae and adults of this species also were collected at the same time and site in the Lech River (Austria) in the absence of confusing species. These collections and associations enabled a description of the hitherto unknown larva of this species. 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 other larvae with comb-shaped gills (Rhyacophila HyperRhyacophila Group) known so far from Austria, Germany, and Switzerland. Species can be separated by coloration patterns of the head and prosternum morphology. Rhyacophila albardana is known from Austria, France, Germany, Italy, and Switzerland (Neu et al. 2018).
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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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four new species of Rhyacophila pictet 1834 trichoptera rhyacophilidae from southeast asia
Zootaxa, 2019Co-Authors: Nannaphat Suwannarat, Hans Malicky, John C Morse, Pongsak LaudeeAbstract:Four new species of genus Rhyacophila are described and illustrated from Thailand and Myanmar, Southeast Asia. Rhyacophila longicaudata sp. n. is in the R. nigrocephala Group; the very long basal segment of each inferior appendage distinguishes it from other related species. Rhyacophila aksornkoaei sp. n. and R. limsakuli sp. n. are in the R. anatina Group: they can be differentiated from other species of the group by the brush-like parameres and presence of a ventral process of the aedeagus in R. aksornkoaei sp. n., and by the rectangular apical segment of each inferior appendage and the hooked parameres in R. limsakuli sp. n.. Rhyacophila kengtungensis is in the R. yishepa Group and is characterized by the subtriangular shape of the preanal appendages in dorsal view and by the very large dorsal appendages of the phallic apparatus.
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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.