VOLUME FOURTEEN: 2018
Diversity and phenology of stoneflies (Plecoptera) from intermittent and perennial streams in Pinnacles National Park, California, U.S.A.
Michael T. Bogan and Stephanie M. Carlson
Illiesia 2018 14(08):144-154. Figures 1-4, 1 Table, 33 references (pp.:152-154.) (9 October 2018)
Stoneflies are often associated with cool perennial streams, but some species can thrive in intermittent streams that cease flowing or dry completely during some parts of the year. The vast majority of stonefly records in California come from perennial streams, and few collection efforts have focused on intermittent streams. In this study, we surveyed 26 intermittent and perennial reaches of the Chalone Creek basin in Pinnacles National Park (California, USA) between 2014 and 2018. We quantified the flow regime at many of these reaches and compared stonefly assemblages with flow metrics. We found at least 14 species of stoneflies, including 8 species of Capniidae and 1 or 2 species each in four other families. Only Malenka californica (Claassen, 1923) was restricted to perennial reaches. All other species were primarily or exclusively found in intermittent reaches, even in reaches with flow permanence values as low as 13%. On average, we found more species in intermittent reaches than perennial reaches, with stonefly species richness peaking at about 60% flow permanence. Many species appeared to have rapid development times (2-3 months) to complete their larval life stage and emerge during brief winter flow periods (Dec-Mar). Given the relatively rich and unique stonefly assemblages we observed, intermittent streams in California deserve further research and conservation attention.
Keywords: Plecoptera, biodiversity, California, drying, drought, flow
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A new species of Nemoura (Plecoptera: Nemouridae) from Kyushu, Japan, with notes on male vibrational signals.
Illiesia 2018 14(07):135-143, Figures 1-18, 1 Table, 5 references (pp.:142) (5 September 2018)
A new species of Nemoura from Japan is described from male and female adults. In addition, the male vibrational signals under solitary condition are described. The new species, N. sefuriensis sp. n. is similar to N. stratum Kawai, 1966 in adult habitus with somewhat shortened wings, but can be distinguished from N. stratum by lacking large sclerotized prolongation on hind margin of male tergum 8, and by having membranous female sternum 8 with a pair of weakly sclerotized small areas.
Keywords: Nemoura sefuriensis sp. n., stonefly, Insecta, drumming
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Malenka diablo, a new species of stonefly from the diablo range of California, U.S.A. (Plecoptera: Nemouridae).
Chris J. Verdone & Boris C. Kondratieff
Illiesia 2018 14(06):126-134, Figures 1-24, 8 references (pp.:133-134) (26 July 2018)
Malenka diablo sp. n. (Plecoptera: Nemouridae) is named from the Diablo Range of west-central California. The new species is proposed based on specific details of the male paraprocts and cerci. The adult male, adult female, and larva are described and supported by colorized scanning electron micrographs (SEM) and color images. Additionally, SEM data is presented for the morphologically similar species M. biloba (Claassen, 1923).
Keywords: Plecoptera, Nemouridae, Malenka, stonefly, new species, California
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Holomorphology and systematics of the eastern Nearctic stonefly genus Remenus Ricker (Plecoptera: Perlodidae).
Chris J. Verdone1 & Boris C. Kondratieff
Illiesia 2018 14(5):81-125, Figures 1-115, 45 references (pp.:123-125) (30 May 2018)
The holomorphology of the eastern Nearctic stonefly genus Remenus Ricker is reviewed using scanning electron microscopy, color photomicrographs and variation in the barcode region of the mitochondrial DNA Cytochrome Oxidase c Subunit I (COI) gene. Examination of all life stages has resulted in new comparative descriptions and a new key to adults. Remenus daniellae Verdone and Kondratieff, sp. n. is described from Great Smoky Mountains National Park, North Carolina and Tennessee, U.S.A. The new species is the fourth species to be included in the genus Remenus and is differentiated from R. bilobatus (Needham & Claassen, 1925), R. duffieldi Nelson & Kondratieff, 1995, and R. kirchneri Kondratieff & Nelson, 1995 by the short clavate epiproct with palmate hair-like spinulae.
Larvae can tentatively be separated into two groups based on basal cercal setal length: (1) variable length setae, R. bilobatus and R. daniellae sp. n., and (2) short setae, R. duffieldi and R. kirchneri. With the application of known distributions, larvae of R. kirchneri and R. duffieldi may be distinguished from R. bilobatus and R. daniellae sp. n. However, sympatry and range overlap precludes the use of this character in distinguishing R. bilobatus and R. daniellae sp. n. Ova of the four species apparently lack distinguishing characteristics and thus are not separable at this time. Distribution maps, biological notes, and a neighbor-joining tree based on COI DNA barcodes are also presented.
Keywords: Plecoptera, Perlodidae, Remenus, Remenus daniellae Verdone & Kondratieff, 2018, key to species, COI DNA sequences
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An update on the stonefly fauna (Insecta, Plecoptera) of Maryland, including new and emended state records and an updated state checklist.
Scott A. Grubbs
Illiesia 2018 14(4):65-80, Figures 1-27, 23 references (pp.:79-80) (30 April 2018)
The stonefly fauna of Maryland is updated. An unassociated female of Perlesta Banks, 1906 is described under informal designation, complete with light microscopy micrographs of head and pronotal pigmentation patterns plus scanning electron microscopy (SEM) images of eggs. New state records are presented for Cultus verticalis (Banks, 1920), Neoperla catharae Stark & Baumann, 1978, and P. mihucorum Kondratieff & Myers, 2011. Light microscopy and SEM micrographs are also presented for P. mihucorum. Published state records of Isoperla Banks, 1906 and Sweltsa onkos (Ricker, 1952) are emended given recent descriptions in both genera. Distribution maps for S. onkos and S. hoffmani Kondratieff & Kirchner, 2009, plus for all species of Isoperla and Perlesta known to occur in the Appalachian Mountain region of western Maryland, are provided. An updated state checklist of 114 species is included.
Keywords: Plecoptera, Perlidae, Perlesta, state records, Maryland
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Nearctic Nemoura trispinosa Claassen, 1923 and N. rickeri Jewett, 1971 are junior synonyms of Holarctic Nemoura species (Plecoptera: Nemouridae).
Scott A. Grubbs, Richard W. Baumann, and David K. Burton
Illiesia 2018 14(3):44-64, Figures 1-84, 60 references (pp.:60-64) (2 April 2018)
Only five species of the diverse Holarctic stonefly genus Nemoura Latreille, 1796 are known to occur in North America. We used scanning electron microscopy to show that (a) N. trispinosa Claassen, 1923 is a junior synonym of N. arctica Esben-Petersen, 1910, and (b) N. rickeri Jewett, 1971 is a junior synonym of N. sahlbergi Morton, 1896. Four species of Nemoura: N. arctica, N. normani Ricker, 1952, N. sahlbergi, and N. spiniloba Jewett, 1954, and are now recognized from the Nearctic realm.
Keywords: Plecoptera, Nemouridae, Nemoura, N. arctica, N. sahlbergi, Nearctic, Holarctic
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Two new stonefly species in the Sweltsa coloradensis (Banks) Complex (Plecoptera: Chloroperlidae).
Bill P. Stark and Richard W. Baumann
Illiesia 2018 14(2):30-43, Figures 1-47, 11 references (pp.:43-43) (28 March 2018)
Male reproductive structures were examined with scanning electron microscopy for populations of the Sweltsa coloradensis (Banks) complex from throughout the known range in western North America. Sufficient variation was observed in epiproct structure to recognize and describe two new species. Sweltsa mogollonica, n. sp. is recognized from eastern Arizona and western New Mexico and S. lyrata, n. sp. is recognized from Alberta, British Columbia, Idaho, Montana, Washington and Yukon Territory.
Keywords: Plecoptera, Chloroperlidae, Sweltsa coloradensis complex, western North America, new species
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Diura washingtoniana (Hanson) resurrected from synonymy with D. nanseni (Kempny) (Plecoptera: Perlodidae), supplemented with a description of the larva and egg and comparison to other congeners.
Charles H. Nelson and C. Riley Nelson
Illiesia 2018 14(1):1-29, Figures 1-81, 91 references (pp.:25-29) (8 March 2018)
Diura washingtoniana (Hanson, 1940) is reinstated from synonymy with D. nanseni (Kempny, 1900). The adult male and female are more completely described and the larva and egg of this species are described for the first time. Diagnostic features for D. washingtoniana are presented and this species is compared to the following congeners: D. nanseni, D. bicaudata (Linnaeus, 1758) and D. knowltoni (Frison, 1937) using line illustrations, scanning electron photomicrographs, and color photographs.
Keywords: Plecoptera, Perlodidae, Diura washingtoniana (Hanson, 1940), species propria, adult redescription, larval and egg description
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