Revision of the Genus Enallagma of the United States West of the Rocky Mountains and Identification of Certain Larvae by Discriminant Analysis (Odonata:Coenagrionidae) PDF Download
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Author: Rosser W. Garrison
Publisher: Univ of California Press
ISBN: 9780520099548
Category : Nature
Languages : en
Pages : 144
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Book Description
Author: Rosser W. Garrison
Publisher: Univ of California Press
ISBN: 9780520099548
Category : Nature
Languages : en
Pages : 144
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Book Description
Author: Michael M. Collins
Publisher:
ISBN: 9780520099531
Category : Enallagma
Languages : en
Pages : 93
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Book Description
Author: Rosser W. Garrison
Publisher:
ISBN: 9780783774824
Category :
Languages : en
Pages : 141
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Book Description
Author: Herman T. Spieth
Publisher:
ISBN: 9780520096912
Category : Courtship in animals
Languages : en
Pages : 93
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Book Description
Author: Michael M. Collins
Publisher:
ISBN: 9780520099531
Category : Enallagma
Languages : en
Pages : 93
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Book Description
Author: Howell V. Daly
Publisher: Univ of California Press
ISBN: 9780520097254
Category : Science
Languages : en
Pages : 88
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Book Description
The African continent has a rich fauna of insects, many of which are unstudied. This monograph treats one such group known as the small carpenter bees. Thirteen biological species in a new genus are described and a key for identification and details of their nests and natural enemies are given.
Author: Charles E. Griswold
Publisher: Univ of California Press
ISBN: 9780520096967
Category : Nature
Languages : en
Pages : 268
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Author: James Kenneth Liebherr
Publisher: Univ of California Press
ISBN: 9780520099586
Category : Science
Languages : en
Pages : 212
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Book Description
Cladistic analysis based on internal male female reproductive characters and external characters is used to group exemplar taxa in the carabid tribe Platynini. A classification, key to genera in North America, and a key to species groups of Agonum in North America north of Mexico are presented. The Agonum extensicolle species group comprises seven species: A. cyanope (Bates); A. extimum Liebherr, n.sp.; A. parextimum Liebherr n. sp.; A. texanum (LeConte); A. extensicolle (Say); A. decorum (Say); A. elongatulum (Dejean). Analyses of infraspecific geographic variation show: 1 ) A. texanum is biometrically uniform over the center of its range whereas individuals from outlying populations deviate in several measurements; 2) A. extensicolle is a variable species, with clinal changes in biometry and color ocurring across its range; 3) A. decorum is polymorphic for color and setation, and clinally variable in biometric characters. Across the group, flight apparatus development is inversely correlated with the amount of genetic heterogeneity measured by starch-gel electrophoresis. Electrophoretic, qualitative morphological, and biometric data are used to estimate phylogenetic relationships in the A. extensicolle group. The electrophoretic and morphological data produce compatible estimates of phylogeny. The biometric data are incompatible with the other data and are judged less useful for estimation of affinities. Distributional data are utilized in conjunction with the proposed phylogeny to investigate speciation events in the group. The principal mechanism is allopatric speciation brought about by vicariance across the lowlands of southeastern Arizona; the Cochise filter barrier. A second pattern involves a peripheral isolate of Antillean stock diverging on the Florida peninsula. A third speciation event involves a habitat shift in which a lowland desert form produced a species which now inhabits the pine-oak zone in the Sierra Madre Occidental. The area-taxon relationships are compared with those in other groups. Based on an electrophoretic clock calibrated using data from Drosophila, the timing of the initial speciation event in the group is estimated at 6-12 million years b.p. Other speciation events occurred throughout the Pliocene and Pleistocene, with the most recent divergence of A. decorum and A. elongatulum estimated at less than two million years b.p.
Author: Grant De Jong
Publisher: Lulu.com
ISBN: 1387872303
Category : Science
Languages : en
Pages : 256
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Book Description
The Black Hills, straddling the border between southwestern South Dakota and northeastern Wyoming, represent an ecological "island" of mountainous terrain in the midst of the Great Plains. Streams, rivers, lakes, and ponds are abundant, yet the aquatic insect fauna inhabiting those ecosystems has not previously been compiled in a single document. This work demonstrates that the known fauna of 95 families, 335 genera, and 447 species-level aquatic insect taxa has a curious mix of eastern, western, northern, and southern biogeographic affinities, yet many significant data gaps remain, and this work can only represent a starting point. The Black Hills beckon more curious naturalists to come and add to our knowledge.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 172
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