Results 11 to 20 of about 20,724 (98)

A Natural Subgeneric Classification of \u3ci\u3eEphemerella Bartoni\u3c/i\u3e and Related Species (Ephemeroptera: Ephemerellidae) [PDF]

open access: yes, 2017
Phyletic relationships indicate that Ephemerella bartoni Allen should be excluded from the subgenus Dannella in order to prevent a polyphyletic and impractical classifica- tion.
McCafferty, W. P
core   +2 more sources

Review of the Genus \u3ci\u3eMacdunnoa\u3c/i\u3e (Ephemeroptera: Heptageniidae) with Description of a New Species From Florida [PDF]

open access: yes, 2017
The imago, nymph, and egg of Macdunnaa brunnea n. sp. are described from the south- eastern U.S. Heptagenia persimpiex is transferred to Macdunnoa and additional diagonostic characters are given for this species and for Macdunnoa nipawinia.
Flowers, R. W
core   +2 more sources

Ephemeroptera of Canada [PDF]

open access: yesZooKeys, 2019
Thus far, 335 currently valid species in 82 genera and 21 families of mayflies (Ephemeroptera) have been documented from Canada, remarkably representing a little more than half of the combined species richness of Canada, Mexico and the USA. The current known species richness for Canada represents an increase of 11.3% as compared to that reported in ...
openaire   +5 more sources

Description of the Nymph of \u3ci\u3eCentroptilum Walshi\u3c/i\u3e (Ephemeroptera: Baetidae), with Biological Notes [PDF]

open access: yes, 2017
The nymph of Centroptilum walshi McDunnough is described. C. walshi appears to be bivoltine in Wisconsin, with emergences throughout June into early July and from late August to early November.
Bergman, Edward A, Hilsenhoff, William L
core   +2 more sources

Gill Ventilation Rates of Mayfly Nymphs (Ephemeroptera: Heptageniidae) as a Biomonitoring Technique [PDF]

open access: yes, 2018
Gill ventilation frequency (GVF) of the mayfly nymph Stenacron interpunctatum (Ephemeroptera: Heptageniidae) was studied to assess the applicability of a relatively simple, real time video methodology and to assess the potential of GVF rates for use in a
Kaster, Jerry L, MacKenzie, Richard A
core   +2 more sources

Resource Partitioning by Two Species of Stream Mayflies (Ephemeroptera: Heptageniidae) [PDF]

open access: yes, 2017
We compared the phenology of nymph development, food type, and habitat selection of two stream mayflies, Stenacron interpunctatum (Say) and Stenonema pulchellum (Walsh) in Big Darby Creek, Ohio.
Britt, N. Wilson, Lamp, William O
core   +2 more sources

The Mayflies, or Ephemeroptera, of Illinois. B. D. Burks, 1975 reprint of Bulletin of the Illinois Natural History Survey, Vol. 26, 1953. Entomological Reprint Specialists, Los Angeles, California, viii + 216 p., 395 figs. $15.00. [PDF]

open access: yes, 2017
(excerpt) The continuing demand for general references and aids to identification of Ephemeroptera has undoubtedly prompted the recent reprinting of The Mayflies. . . of Illinois. A two-page preface by George F. Edmunds, Jr.
McCafferty, W. P
core   +2 more sources

Assessing Aquatic Insect Flight Behavior with Sticky Traps [PDF]

open access: yes, 2017
A suspended sticky trap was designed to analyze flight behavior of aquatic insects, including both direction and vertical distribution of flight. Specifications of trap construction are detailed.
Harris, T. L, McCafferty, W. P
core   +3 more sources

Identification and Distribution of \u3ci\u3eBaetisca\u3c/i\u3e Nymphs (Ephemeroptera: Baetiscidae) in Wisconsin [PDF]

open access: yes, 2017
Nymphs of three species of Baetisca (Ephemeroptera: Baetiscidae) have been collected in Wisconsin. Baetisca laurentina was most abundant. occurring in a wide variety of streams and occasionally in impoundments.
Hilsenhoff, William L
core   +2 more sources

Epizooic Diatoms on the Cerci of Ephemeroptera (Caenidae) Naiads [PDF]

open access: yes, 2018
Using scanning electron microscopy, epizooic diatoms were observed growing on the cerci of Caenis amica Hagen naiads (Ephemeroptera, Caenidae). Meridion circulare (Greville) C.
Wujek, Daniel E
core   +3 more sources

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