• Title, Summary, Keyword: mayfly

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A New Euthyplociid Burrowing Mayfly (Ephemeroptera: Euthyplociinae, Polymitarcyidae) from Vietnam

  • Nguyen, Van-Vinh;Bae, Yeon-Jae
    • Animal cells and systems
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    • v.7 no.4
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    • pp.279-282
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    • 2003
  • A new euthyplociid burrowing mayfly (Polymitarcyidae, Ephemeroidea, Ephemeroptera), Polyplocia orientalis n. sp., from Vietnam is described with larval habitus and line drawings of mouthparts. The larva of the species is characterized by the mandibular tusks that bear numerous hairlike and stout setae on their dorsal and lateral surfaces and by the apical process of foretibiae that is nearly one-fourth the length of foretarsi. Its habitat and biological data and taxonomic remarks are provided. The burrowing mayfly subfamily Euthyplociinae is reviewed from a historical perspective.

Estimation on the Physical Habitat Suitability of Benthic Macroinvertebrates in the Gapyeong Stream (가평천 저서성 대형무척추동물의 물리적 서식처 적합성 평가)

  • Kong, Dongsoo;Kim, Ah Reum
    • Journal of Korean Society on Water Environment
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    • v.33 no.3
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    • pp.311-325
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    • 2017
  • Habitat suitability index (HSI) of 17 benthic macroinvertebrate taxa, which were lotic insects of generic category except Potamanthidae in mayfly, was developed for three physical habitat factors (current velocity, water depth and substrate) based on an ecological monitoring in a Korean stream (Gapyeong). Weibull model was used as a probability density function to analyze the distribution of individual abundance related with physical factors, which showed it was so available. Number of species and total individual abundance increased along with the increase of current velocity and the mean diameter of substrate, and decreased along with the increase of water depth. Most taxa showed a clear preference for a fast current velocity, shallow water depth and coarse substrate except Ephemera, Potamanthidae (mayfly), and Plectrocnemia (caddisfly) which were rheophobic, potamophilic and lithophobious. Based on the canonical correspondence analysis, the relative importance of each factor was determined as follows: current velocity > substrate > water depth.

Two Heptageniid Mayfly Species of Thalerosphyrus Eaton (Ephemeroptera: Heptageniidae) from Vietnam (베트남산 Thalerosphyrus속(하루살이목: 납작하루살이과)의 납작하루살이 2종)

  • Nguyen Van Vinh;Bae Yeon Jae
    • Animal Systematics, Evolution and Diversity
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    • v.20 no.2
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    • pp.215-223
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    • 2004
  • Two species of the heptageniid mayfly genus Thalerosphyrus Eaton, T. vietnamensis (Dang) and T. separatus n. sp., are described from Vietnam. Thalerosphyrus separatus can be distinguished by the basally detached posterolateral expansions of pronotum in larva and by the Y -shaped penes in male adult. Their larval and adult stages are described with line-drawings of diagnostic characters. Their diagnoses, distributions, habitat and ecological data, and taxonomic remarks are provided.

The Hornless Australian Burrowing Mayfly Ulmerophlebia (Ephemeroptera: Leptophlebiidae)

  • Bae, Yeon Jae;Finlay, Kyla J.;Campbell, Ian C.
    • Animal Systematics, Evolution and Diversity
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    • v.28 no.4
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    • pp.230-240
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    • 2012
  • The hornless Australian burrowing mayfly genus Ulmerophlebia Demoulin (Leptophlebiidae) is revised based on comprehensive examinations of adult and larval material collected throughout Australia. Two new species [Ulmerophlebia deani n. sp. and U. minuta n. sp.] and three named species [U. annulata (Harker), U. mjobergi (Ulmer) and U. pipinna Suter] are included. The larva of U. deani can be distinguished by the moderately developed apicomedial expansion of gills and W-shaped markings on the abdominal terga. The male adult of U. minuta can be easily distinguished by the greatly reduced penes. Descriptions, diagnoses, line-drawings of key characters, material and distributional data, taxonomic remarks and adult and larval keys are provided.

Three New Species of Procloeon (Ephemeroptera: Baetidae) from Thailand

  • Tungpairojwong, Nisarat;Bae, Yeon Jae
    • Animal Systematics, Evolution and Diversity
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    • v.31 no.1
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    • pp.22-30
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    • 2015
  • Three baetid mayflies in the genus Procloeon Bengtsson are described from Thailand: P. narumonae, n. sp. (male and female adults and larva), P. rubeosternum, n. sp. (male and female adults, male and female subimagos, and larva), and P. siamensis, n. sp. (larva). Descriptions of known stages with line-drawings of diagnostic characters, material data, diagnoses, habitat data, and taxonomic remarks are provided.

Ephemera separigata, a New Species of Ephemeridae (Insecta: Ephemeroptera) from Korea (한국산 하루살이과(곤충강: 하루살이목)의 1신종 가는무늬하루살이의 보고)

  • Yeon Jae Bae
    • Animal Systematics, Evolution and Diversity
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    • v.11 no.2
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    • pp.159-166
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    • 1995
  • Mature larva and male and female adults of an ephemerid mayfly (Ephemeroptera : Ephemeridae) ,Ephemera separigata n.sp., were described from Korea. Larvae and adults of the species were distinguished from other Ephemera spp. by a apir of narrow and laterally oriented longitudinal stripses on the abodminal terga 7-9 . Larvae of the species adapted to cold water high mountain torrents(altitude 500-700m) where substrates were sand, gravel, and a large portion of pebbles and cobbles. Altitudinal adaptations between Korean Ephemera spp. were briefly discussed.

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Larval Growth of Cloeon dipterum(Ephemeroptera: Baetidae) in Different Temperature Conditions (서로 다른 온도 조건에서 연못하루살이(Cloeon dipterum: 꼬마하루살이과, 하루살이목) 유충의 성장)

  • Hwang Jeong Mi;Lee Sung Jin;Bae Yeon Jae
    • Korean Journal of Environmental Biology
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    • v.23 no.2
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    • pp.114-119
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    • 2005
  • Larval survivorships, growth rates, developmental rates, and emergence rates of Cloeon dipterum were studied under four constant temperatures $(10^{\circ}C,\; 15^{\circ}C,\;20^{\circ}C,\;and\;25^{\circ}C)$ in the laboratory. Larval mortalities were relatively higher during the initial one-week period, but those tend to be stabilized as the experiments proceed. Judging from the growth and develop-mental rates, estimated optimal temperature for larval growth and development lies between $20^{\circ}C\;and\;25^{\circ}C$. Estimated larval period for emergence is less than 100 days.