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Marvin C Williams - One of the best experts on this subject based on the ideXlab platform.
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Biogeographic studies on trichomycete gut fungi in winter stonefly nymphs of the genus Allocapnia
Mycologia, 1993Co-Authors: Robert W. Lichtwardt, Martin J. Huss, Marvin C WilliamsAbstract:Winter stoneflies of the genus Allocapnia (Plecoptera, Capniidae) have low vagility, and apparently first evolved in the Appalachian system from where they slowly dispersed and speciated at different times during the Pleistocene. Five described genera and species of Harpellales (Trichomycetes) live in the aquatic nymphs of Allocapnia. Two of these, Genistelloides hibernus and Simuliomyces spica, were found widely distributed in 53 stream sites in nine states that include the western and southern dis? tribution limits of Allocapnia spp. This suggests that the fungi had already evolved in Allocapnia nymphs before major radiation pulses of the stoneflies during the Pleistocene. Two other fungi, Ejectosporus magnus and Capniomyces stellatus, were more limited in their distribution and might have evolved subsequent to early Allocapnia dispersals. One species, Orphella hiemalis, may be endemic to the Ozark Plateau and Ouachita Mountains. The presence of different extant species of Genistelloides and Orphella in the stonefly faunas of North America and Europe indicates that species of those two genera of fungi must have existed prior to the final separation of the two continents during the Lower Eocene. Isozymes were extracted and electrophoresed from 25 axenic cultures of G. hibernus obtained from six states. When grouped by geographic region, the greatest coefficient of similarity among fungal isozyme phenotypes was between the Ozarkian isolates and those from northeastern Texas. However, the similarities between central Tennessee and Kansas were greater than they were between eastern Tennessee and Alabama. This apparent disparity might be explained biogeographically by a southwestward Pleistocene dispersal into Alabama of G. hibernus-infested Allocapnia populations originally located between the Cumberland Plateau and the mountains to the east, and a separate westward dispersal of other pop? ulations of fungus-infested stoneflies that were situated to the west of the Cumberland Plateau. The isozyme data also suggest that G. hibernus may have moved with its hosts from northern Alabama into the Ozark Plateau.
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ejectosporus an unusual new genus of harpellales in winter emerging stonefly nymphs Capniidae and a new species of paramoebidium amoebidiales
Mycologia, 1991Co-Authors: Robert W. Lichtwardt, Stephen W Peterson, Marvin C WilliamsAbstract:Ejectosporus magnus belongs to a new monotypic genus of Harpellales (Trichomycetes) found in the hindgut of Allocapnia spp. nymphs (Plecoptera, Capniidae). The mature sporangiospore is forcefully e...
Robert W. Lichtwardt - One of the best experts on this subject based on the ideXlab platform.
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Biogeographic studies on trichomycete gut fungi in winter stonefly nymphs of the genus Allocapnia
Mycologia, 1993Co-Authors: Robert W. Lichtwardt, Martin J. Huss, Marvin C WilliamsAbstract:Winter stoneflies of the genus Allocapnia (Plecoptera, Capniidae) have low vagility, and apparently first evolved in the Appalachian system from where they slowly dispersed and speciated at different times during the Pleistocene. Five described genera and species of Harpellales (Trichomycetes) live in the aquatic nymphs of Allocapnia. Two of these, Genistelloides hibernus and Simuliomyces spica, were found widely distributed in 53 stream sites in nine states that include the western and southern dis? tribution limits of Allocapnia spp. This suggests that the fungi had already evolved in Allocapnia nymphs before major radiation pulses of the stoneflies during the Pleistocene. Two other fungi, Ejectosporus magnus and Capniomyces stellatus, were more limited in their distribution and might have evolved subsequent to early Allocapnia dispersals. One species, Orphella hiemalis, may be endemic to the Ozark Plateau and Ouachita Mountains. The presence of different extant species of Genistelloides and Orphella in the stonefly faunas of North America and Europe indicates that species of those two genera of fungi must have existed prior to the final separation of the two continents during the Lower Eocene. Isozymes were extracted and electrophoresed from 25 axenic cultures of G. hibernus obtained from six states. When grouped by geographic region, the greatest coefficient of similarity among fungal isozyme phenotypes was between the Ozarkian isolates and those from northeastern Texas. However, the similarities between central Tennessee and Kansas were greater than they were between eastern Tennessee and Alabama. This apparent disparity might be explained biogeographically by a southwestward Pleistocene dispersal into Alabama of G. hibernus-infested Allocapnia populations originally located between the Cumberland Plateau and the mountains to the east, and a separate westward dispersal of other pop? ulations of fungus-infested stoneflies that were situated to the west of the Cumberland Plateau. The isozyme data also suggest that G. hibernus may have moved with its hosts from northern Alabama into the Ozark Plateau.
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ejectosporus an unusual new genus of harpellales in winter emerging stonefly nymphs Capniidae and a new species of paramoebidium amoebidiales
Mycologia, 1991Co-Authors: Robert W. Lichtwardt, Stephen W Peterson, Marvin C WilliamsAbstract:Ejectosporus magnus belongs to a new monotypic genus of Harpellales (Trichomycetes) found in the hindgut of Allocapnia spp. nymphs (Plecoptera, Capniidae). The mature sporangiospore is forcefully e...
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ORPHELLA HIEMALIS: A NEW AND RARE TRICHOMYCETE OCCURRING IN WINTER-EMERGING STONEFLIES (PLECOPTERA, Capniidae)
Mycologia, 1991Co-Authors: Robert W. Lichtwardt, Stephen W Peterson, Martin J. HussAbstract:Orphella hiemalis Peterson, Lichtwardt & Huss (Zygomycotina, Trichomycetes, Harpellales) from the hindgut of winter-emerging stonefly nymphs of the genus Allocapnia (Plecoptera, Capniidae) is described and illustrated. It was found in only a few nymphs from two stream sites, one in northwestern Arkansas on the Ozark Plateau, the other in eastern Oklahoma in the Ouachita Mountains. It appears to be a rare species, in contrast to some other gut fungi in Allocapnia spp. Like O. haysii from Nemouridae nymphs in Colorado Rocky Mountain streams, mature sporulating heads of O. hiemalis protrude from the host's anus, and trichospores do not detach from their generative cells in the manner typical of most other Harpellales. Rather, a 3-celled dissemination unit is formed by individual clavate generative cells breaking away from a basal cell together with a sterile, filiform terminal cell and attached allantoid trichospore.
David Muranyi - One of the best experts on this subject based on the ideXlab platform.
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female answer specificity to male drumming calls in three closely related species of the stonefly genus zwicknia plecoptera Capniidae
Insect Science, 2020Co-Authors: Kirill Mark Orci, David MuranyiAbstract:This study examines the rate of female answers to conspecific versus heterospecific male vibratory calls in three, closely related stonefly species: Zwicknia bifrons, Z. acuta, and Z. rupprechti. In a previous study those three species were recognized on the basis of their distinct male drumming calls along with differences in genital morphology and genetic divergence. During this study no-choice playback experiments using original male call samples from each species were performed, and the answer rate of females to conspecific and heterospecific signal variants was measured. Mixed effect logistic regression models were used to test if male call species identity had a statistically significant effect on female answer probability. Females answered conspecific male calls with significantly higher probability than heterospecific calls in all the three examined species, suggesting that the divergence of vibrational communication can be an important component of the prezygotic isolation between them. Low, but well detectable responsiveness to heterospecific calls was observable between Z. bifrons and Z. acuta, the two species closest to each other regarding mitochondrial genetic divergence and male call pattern similarity. Thus, our results are most congruent with a tight, gradual coevolution of male calls and female preferences.
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a new genus and species of winter stoneflies plecoptera Capniidae from southwest china with a commented checklist of the family in the oriental realm
Zootaxa, 2015Co-Authors: David Muranyi, Weihai Li, Ding YangAbstract:A new genus and species of the family Capniidae (Plecoptera), Sinocapnia kuankuoshui gen. n., sp. n. is described from the adult male and a female collected in Guizhou Province of southwest China. The new taxon is distinguished from all extant Capniidae genera and the assemblage of species currently included in Capnia sensu lato by combination of unique genitalic, wing, and thoracic sclerites characters. No closely related taxon is indicated on the basis of morphological characters. An annotated checklist of the family Capniidae from the Oriental Realm is given.
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zwicknia gen n a new genus for the capnia bifrons species group with descriptions of three new species based on morphology drumming signals and molecular genetics and a synopsis of the west palaearctic and nearctic genera of Capniidae plecoptera
Zootaxa, 2014Co-Authors: David Muranyi, Maribet Gamboa, Kirill Mark OrciAbstract:Zwicknia Muranyi, gen. n. is erected for the Capnia bifrons species group sensu Zhiltzova, 2001 with the description of three new species based on morphology, mating call, and the mitochondrial DNA marker cytochrome c oxidase I: Z. acuta Muranyi & Orci, sp. n., Z. kovacsi Muranyi & Gamboa, sp. n. and Z. rupprechti Muranyi, Orci & Gamboa, sp. n.. Zwicknia bifrons (Newman, 1838) comb. n. is selected as the type species and redescribed. The other three species placed into Zwicknia , gen. n., Z. sevanica (Zhiltzova, 1964) comb. n., Z. tuberculata (Zhiltzova, 1964) comb. n., and Z. turkestanica (Kimmins, 1950) comb. n. are redescribed based only on morphological characters. Comparative morphological studies and newly discovered characters of the genitalia has allowed for the first time a synopsis of the adults of the West Palaearctic and Nearctic genera of Capniidae. Arsapnia Banks, 1897 (type species: A. decepta Banks, 1897 comb. rev.) is removed from synonymy with Capnia Pictet, 1841 with new combinations, Arsapnia arapahoe (Nelson & Kondratieff, 1988) comb. n., A. coyote (Nelson & Baumann, 1987) comb. n., A. pileata (Jewett, 1966) comb. n., A. sequoia (Nelson & Baumann, 1987) comb. n., A. teresa (Claassen, 1924) comb. n., A. tumida (Claassen, 1924) comb. n., and A. utahensis (Gaufin & Jewett, 1962) comb. n. A new sensu stricto diagnosis of Capnia is proposed with comments on the taxa retained in Capnia sensu lato.
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two new species of zwicknia muranyi with molecular data on the phylogenetic position of the genus plecoptera Capniidae
Zootaxa, 2014Co-Authors: Louis Boumans, David MuranyiAbstract:Analyses of the nuclear DNA marker 28S confirm the distinctness of the recently erected stonefly genus Zwicknia Muranyi 2014, which encompasses the species until recently referred to as ‘ Capnia bifrons .’ Two new species are described and illustrated with line drawings: Z. westermanni Boumans & Muranyi, sp. n. from Germany and France, and Z. komica Muranyi & Boumans, sp. n. from the Komi Republic in northwestern Russia. The intersexual communication of the former species is described in detail. A phylogenetic analysis of 87 sequences of the mitochondrial marker cytochrome c oxidase I (COI) representing the six described European species of Zwicknia and outgroup taxa reveals large genetic distances within the species Z. rupprechti and Z. bifrons , while the haploclade including all specimens of the latter species also includes Z. acuta and Z. westermanni . The mitochondrial phylogeny is assumed not to represent the species phylogeny. In contrast, a phylogeny of the nuclear markers 28S and ITS reveals that Z. rupprechti and Z. westermanni are more closely related to each other than either is to Z. bifrons . This finding is in line with the drumming patterns of the former two species being relatively similar.
Zhi-teng Chen - One of the best experts on this subject based on the ideXlab platform.
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Plecoptera larvae of China: larval descriptions of two stonefly species (Capniidae, Nemouridae) from Jiangsu Province
Zootaxa, 2020Co-Authors: Zhi-teng ChenAbstract:Larvae of Capnia zijinshana Du & Chen, 2016 (Capniidae) and Nemoura nankinensis Wu, 1926 (Nemouridae) are described and illustrated based on recently collected specimens collected from Jiangsu Province of southeastern China. These are the first larval descriptions in the family Capniidae and the genus Nemoura Latrielle, 1796 from China. Larval morphology of C. zijinshana is similar to the adults. Larvae of N. nankinensis are consistent with the generic larval definition of previous literature.
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a new winter stonefly plecoptera Capniidae from shaanxi province of china
Zootaxa, 2019Co-Authors: Zhi-teng Chen, Liangdong SongAbstract:A new winter stonefly species of the genus Capnia Pictet, 1841, Capnia s.l. bilobata sp. nov. is described and illustrated from Shaanxi Province of northwestern China. The new species is distinguished from all currently known Capnia s.l. by the male and female genitalic characters. The falciform projection on male tergum 9 and the unique-shaped female subgenital plate separate the new taxon from other congeners.
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The first two mitochondrial genomes from Taeniopterygidae (Insecta: Plecoptera): Structural features and phylogenetic implications.
International Journal of Biological Macromolecules, 2017Co-Authors: Zhi-teng Chen, Yuzhou DuAbstract:Abstract The complete mitochondrial genomes (mitogenomes) of Taeniopteryx ugola and Doddsia occidentalis (Plecoptera: Taeniopterygidae) were firstly sequenced from the family Taeniopterygidae. The 15,353-bp long mitogenome of T. ugola and the 16,020-bp long mitogenome of D. occidentalis each contained 37 genes including 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs) and a control region (CR). The mitochondrial gene arrangement of the two taeniopterygids and other stoneflies was identical with the putative ancestral mitogenome of Drosophila yakuba. Most PCGs used standard ATN start codons and TAN termination codons. Twenty-one of the 22 tRNAs in each mitogenome could fold into the cloverleaf secondary structures, while the dihydrouridine (DHU) arm of trnSer (AGN) was reduced or absent. Stem-loop (SL) structures, poly-T stretch, poly-[AT]n stretch and tandem repeats were found in the CRs of the two mitogenomes. The phylogenetic analyses using Bayesian inference (BI) and maximum likelihood methods (ML) generated identical results, both supporting the monophyly of all stonefly families and the two infraorders, Systellognatha and Euholognatha. Taeniopterygidae was grouped with another two families from Euholognatha. The relationships within Plecoptera were recovered as (((Perlidae + Peltoperlidae) + ((Pteronarcyidae + Chloroperlidae) + Styloperlidae)) + ((Capniidae + Taeniopterygidae) + Nemouridae)) + Gripopterygidae.
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new species and a new record of Capniidae plecoptera from xinjiang uygur autonomous region of northwestern china
Zootaxa, 2017Co-Authors: Zhi-teng Chen, Yuzhou DuAbstract:Two new winter stoneflies (Capniidae), Capnia trispinosa Chen & Du sp. nov. and Isocapnia apicispina Chen & Du sp. nov. are described from Xinjiang Uygur Autonomous Region of northwestern China. Capnia trispinosa sp. nov. is characterized by the main epiproct sclerite with three large dorsal spines. Isocapnia apicispina sp. nov .is characterized by its dorsal apex of main epiproct sclerite truncated with denticulate lateral margins and by having a ventroapical spine on epiproct. The new species are compared with similar taxa. Additionally, the widespread Palearctic C. nigra (Pictet, 1833) is reported for the first time for China from the Xinjiang Uygur Autonomous Region.
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description of two new capnia species plecoptera Capniidae from the hengduan mountains of southwestern china
Zootaxa, 2017Co-Authors: Zhi-teng Chen, Yuzhou DuAbstract:Two new species of the genus Capnia from the Hengduan Mountains of southwestern China, C. oblata sp. nov. and C. xiei sp. nov. are described and illustrated as new members of the C. cordata Kimmins species group. Capnia oblata sp. nov. is characterized by posteromedial process of tergum 9 connecting antecosta with the medial sclerite bar. Capnia xiei sp. nov. is characterized by main epiproct sclerite bifurcate apically and basally with a bilamellar structure. The new species are compared with similar taxa.
Yuzhou Du - One of the best experts on this subject based on the ideXlab platform.
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The complete mitochondrial genome of Flavoperla biocellata Chu, 1929 (Plecoptera: Perlidae) and the phylogenetic analyses of Plecoptera.
PeerJ, 2020Co-Authors: Yue Shen, Yuzhou DuAbstract:: Of the roughly 400 species of Perlidae in the world, most species are widely distributed in the northern hemisphere, but a few can be found in South Africa and South America. There are only five species in the genus Flavoperla of the family Perlidae in China. To gain a better understanding of the architecture and evolution of mitochondrial genome in Flavoperla, the entire mitochondrial genome (mitogenome) of a Chinese Flavoperla biocellata Chu, 1929 from family Perlidae (Insecta: Plecoptera) was sequenced. The 15,805-bp long mitochondrial genome of F. biocellata contained 37 genes, including 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs) and a putative control region (CR). The gene arrangement of F. biocellata was identical with that of other stoneflies and with the fly Drosophila yakuba. Most PCGs of F. biocellata used the standard ATN start codons and complete TAN termination codons. Twenty-one of the 22 tRNA genes exhibited cloverleaf secondary structures, but the dihydrouridine (DHU) arm of trnSer (AGN) was completely reduced. Phylogenetic analyses with both Bayesian inference (BI) and maximum likelihood methods (ML) generated similar topology, both supporting the monophyly of all stonefly families and the infraorder Systellognatha. The phylogenetic analysis based on mitochondrial genomic data from 30 stonefly species recovered a well-supported tree resolving higher-level relationships within Plecoptera. The northern hemisphere suborder Arctoperlaria divided into two groups, Euholognatha and Systellognatha. The southern hemisphere suborder Antarctoperlaria formed two clades: Eustheniidae+Diamphipnoidae and Austroperlidae+ Gripopterygidae; consistent with relationships proposed based on morphology. The final relationships within Plecoptera were recovered as (((Perlidae+(Perlodidae+Chloroperlidae))+(Pteronarcyidae+(Peltoperlidae+Styloperlidae))) +(Taeniopterygidae+(Capniidae+(Nemouridae+Notonemouridae))))+ (Gripopterygoidae+Eusthenioidae).
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The Mitochondrial Genome of Leuctra Sp. (Plecoptera: Leuctridae) and Its Performance in Phylogenetic Analyses
Zootaxa, 2019Co-Authors: Yue Shen, Yuzhou DuAbstract:: The nearly complete mitochondrial genome (mitogenome) of Leuctra sp. (Plecoptera: Leuctridae) was sequenced. The 14,585-bp long mitogenome of L. sp. contained 37 genes including 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs), and a control region (CR). The mitochondrial gene arrangement of L. sp. was identical with other stoneflies and the putative ancestral mitogenome of Drosophila yakuba Burla. Most PCGs used standard ATN start codons and TAN termination codons. Twenty-one of the 22 tRNAs in each mitogenome exhibited the cloverleaf secondary structures, while the dihydrouridine (DHU) arm of trnSer (AGN) was reduced. Phylogenetic analyses using our new Leuctra sp. genome and all other publicly available genomes for Plecoptera and Bayesian inference (BI) and maximum likelihood methods (ML) generated identical topologies, both supporting the monophyly of all stonefly families for which tests were possible and the infraorder Systellognatha. Scopuridae and Gripopterygidae were grouped with the infraorder Euholognatha. The final relationships within Plecoptera were recovered as (((((Perlodidae + Chloroperlidae) + Perlidae) + Pteronarcyidae) + Peltoperlidae) + Styloperlidae) + (((((Capniidae + Taeniopterygidae) + Nemouridae) + Scopuridae) + Leuctridae) + Gripopterygidae).
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The first two mitochondrial genomes from Taeniopterygidae (Insecta: Plecoptera): Structural features and phylogenetic implications.
International Journal of Biological Macromolecules, 2017Co-Authors: Zhi-teng Chen, Yuzhou DuAbstract:Abstract The complete mitochondrial genomes (mitogenomes) of Taeniopteryx ugola and Doddsia occidentalis (Plecoptera: Taeniopterygidae) were firstly sequenced from the family Taeniopterygidae. The 15,353-bp long mitogenome of T. ugola and the 16,020-bp long mitogenome of D. occidentalis each contained 37 genes including 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs) and a control region (CR). The mitochondrial gene arrangement of the two taeniopterygids and other stoneflies was identical with the putative ancestral mitogenome of Drosophila yakuba. Most PCGs used standard ATN start codons and TAN termination codons. Twenty-one of the 22 tRNAs in each mitogenome could fold into the cloverleaf secondary structures, while the dihydrouridine (DHU) arm of trnSer (AGN) was reduced or absent. Stem-loop (SL) structures, poly-T stretch, poly-[AT]n stretch and tandem repeats were found in the CRs of the two mitogenomes. The phylogenetic analyses using Bayesian inference (BI) and maximum likelihood methods (ML) generated identical results, both supporting the monophyly of all stonefly families and the two infraorders, Systellognatha and Euholognatha. Taeniopterygidae was grouped with another two families from Euholognatha. The relationships within Plecoptera were recovered as (((Perlidae + Peltoperlidae) + ((Pteronarcyidae + Chloroperlidae) + Styloperlidae)) + ((Capniidae + Taeniopterygidae) + Nemouridae)) + Gripopterygidae.
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new species and a new record of Capniidae plecoptera from xinjiang uygur autonomous region of northwestern china
Zootaxa, 2017Co-Authors: Zhi-teng Chen, Yuzhou DuAbstract:Two new winter stoneflies (Capniidae), Capnia trispinosa Chen & Du sp. nov. and Isocapnia apicispina Chen & Du sp. nov. are described from Xinjiang Uygur Autonomous Region of northwestern China. Capnia trispinosa sp. nov. is characterized by the main epiproct sclerite with three large dorsal spines. Isocapnia apicispina sp. nov .is characterized by its dorsal apex of main epiproct sclerite truncated with denticulate lateral margins and by having a ventroapical spine on epiproct. The new species are compared with similar taxa. Additionally, the widespread Palearctic C. nigra (Pictet, 1833) is reported for the first time for China from the Xinjiang Uygur Autonomous Region.
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description of two new capnia species plecoptera Capniidae from the hengduan mountains of southwestern china
Zootaxa, 2017Co-Authors: Zhi-teng Chen, Yuzhou DuAbstract:Two new species of the genus Capnia from the Hengduan Mountains of southwestern China, C. oblata sp. nov. and C. xiei sp. nov. are described and illustrated as new members of the C. cordata Kimmins species group. Capnia oblata sp. nov. is characterized by posteromedial process of tergum 9 connecting antecosta with the medial sclerite bar. Capnia xiei sp. nov. is characterized by main epiproct sclerite bifurcate apically and basally with a bilamellar structure. The new species are compared with similar taxa.
