517 research outputs found

    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.

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    (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. dealing with taxonomic and nomenclatural changes since the original 1953 publication has been added and will serve as an adequate aid to those unfamiliar with changing concepts in mayfly systematics. The reprinting is of high quality with the large number of figures having been excellently reproduced in this hard-bound edition

    The Relationship Between North and Middle American \u3ci\u3eStenonema\u3c/i\u3e (Ephemeroptera: Heptageniidae)

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    Stenonema integrum (McDunnough) is shown to be a junior synonym of S. mexicanum (Ulmer.) n.syn. Subspecific status is delegated to Nearctic and Neotropical populations of this species as S. m. imegrum and S, m. mexicanum, respectively. Newly studied materials from Costa Rica and Belize indicate that adults of the two subspecies may be differentiated by the presence of thoracie pleural stripes in S. m. mexicanum. Consistent differentiating lanai characteristics are not known, A Pleistocene dispersal into Middle America and subsequent vicariance is hypothesized

    New Larval Descriptions and Comparisons of North American \u3ci\u3eChoroterpes\u3c/i\u3e (Ephemeroptera: Leptophlebiidae)

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    Formal descriptions of larvae of the western North American species Choroterpes albiannulata and the eastern North American species Choroterpes fusca (Ephemeroptera: Leptophlebiidae) are given for the first time. Specimens, including reared adult and larval associations, of C. albiannulata were available from Nevada, Oregon, and Idaho, and rearings of C. fusca were made from the Huron Mountains in the Upper Peninsula of Michigan. Six of the nine species of North American Choroterpes (subgenus Choroterpes) are now known as larvae. Larval characteristics are compared, particularly with regard to similarities and differences between C. albiannulata and C. fusca, c. albiannulata and the western C. inornata. and C. fusca and the eastern C. basalis. Choroterpes albiannulata is distinct but shares gill morphology with C. inornata. Choroterpes fusca is quite similar to C. basalis, sharing . morphology and color patterning, but with some apparent differences that may prove to be consistent. Certain Choroterpes larvae from Arkansas are probably C. oklahomae (known only as adults from Oklahoma) but cannot be associated at this time. Distributions of species of subgenus Choroterpes are updated, and a revision of the entire genus based on cladistic analysis is recommended

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

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    Phyletic relationships indicate that Ephemerella bartoni Allen should be excluded from the subgenus Dannella in order to prevent a polyphyletic and impractical classifica- tion. A classification in the subgenus Eurylophella is more consistent with the species\u27 phyletic relationships

    Pre-Management Assessment of Aquatic Macroinvertebrates in a Small, Sedimentary Drainage Area of the Maumee and Lake Erie Basin

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    In order to establish baseline data adjunct to the research and development of soil conservation practices for sediment reduction in the Maumee River and Lake Erie, the aquatic macroinvertebrates of Black Creek and adjacent areas in northeastern Indiana were studied from 1974-1975. A total of 90 species of Insecta and Crustacea were taken, 69 from Black Creek. Species diversity indices ranged from 1.04 to 2.75 in two downstream locations and were generally reflective of stressed conditions related to channelization and sedimentation from the agrarian drainage area. Benthic species from the adjacent Maumee River potentially contribute in part to population maintenance in Black Creek

    Life History Aspects of \u3ci\u3eAnthopotamus Verticis\u3c/i\u3e (Ephemeroptera: Potamanthidae)

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    The study of the larval development and life cycle of a population of the mayfly Anthopotamus verticis from the Tippecanoe River, Indiana was based on monthly and weekly sampling in 1990 and 1991. Larval head width and tusk length were directly correlated with body size; whereas wingpad development represented an exponential relationship with body size. Relative maturation of larvae was efficiently assessed, however. by using wingpad development. The morphology of eggs is described. Larval growth and development took place mainly from March to Au~st. Although emergence is protracted from mid-July to mid-August, the major recruitment of new larvae occurred in August. Only one cohort was ascertained. The species overwinters as mostly young larvae. The simple univoltine life cycle appears to be related to seasonal temperature

    Assessing Aquatic Insect Flight Behavior with Sticky Traps

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    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. Possible applications were explored and preliminary results from the study of a small Indiana stream demonstrated primary upstream migration of females, and indicated vertical partitioning of flight activity at the species level

    Indiana Ensifera (Orthopera)

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    (excerpt) A total of 67 species of long-horned grasshoppers and crickets were reported to occur in Indiana by Blatchley (1903) in his Orthoptera of Indiana. Distributional information concerning thek species was sparse and has not been significantly supplemented since that time. Subsequent works which have dealt either heavily or exclusively with the Indiana fauna include Fox (1915), Blatchley (1920), Cantrall and Young (1954), and Young and Cantrall(1956)

    New Techniques for Associating the Stages of Aquatic Insects

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    (excerpt) The immature forms of many benthic insect species are presently either undescribed or unidentifiable. The result is that associations with corresponding adult forms are often necessary in order to confirm specific and sometimes generic identifications. Specific determination of aquatic stages of insects is prerequisite to adequately understanding the various aspects and implications of autecological specificity and the synecological dynamics of an aquatic system. Wiggins (1966), among others, has adequately pointed out the basic necessity of being able to discriminate between immature aquatic species
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