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Johnson S New Universal Cyclop Dia

Johnson s New Universal Cyclop dia PDF
Author: Frederick Augustus Porter Barnard
Publisher:
ISBN:
Size: 66.97 MB
Format: PDF, ePub
Category : Encyclopedias and dictionaries
Languages : en
Pages :
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Pennak S Freshwater Invertebrates Of The United States

Pennak s Freshwater Invertebrates of the United States PDF
Author: Douglas Grant Smith
Publisher: John Wiley & Sons
ISBN: 9780471358374
Size: 75.28 MB
Format: PDF
Category : Science
Languages : en
Pages : 664
View: 5509

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Need-to-know information on the classification and identificationof aquatic invertebrates This Fourth Edition of the standard reference used by generationsof professionals and students is the source for authoritativeinformation on the natural history, ecology, and taxonomy offree-living American freshwater invertebrates. Completely revisedand updated, this professional field guide features a wealth of newknowledge on invertebrate animal phyla covered in the previousedition as well as fully modified sections on the preparation ofmaterials. Other important features of Pennak's Freshwater Invertebrates ofthe United States, Fourth Edition include: * Current taxonomical arrangements of all freshwater invertebrateanimals, excluding insects * Improved graphical treatments and keys to identification, severalprovided by specialists * Photographs and color plates to aid identification * More than 300 line drawings, many new to this edition * Taxonomic keys carried uniformly to genus level in all but twophyla, with frequent references to species Pennak's Freshwater Invertebrates of the United States, FourthEdition is an indispensable resource for biologists, ecologists,graduate students, and anyone who needs to acquire the thoroughknowledge of aquatic invertebrates that is essential tounderstanding the community structure of freshwater environments.

Endemism Of Subterranean Diacyclops In Korea And Japan With Descriptions Of Seven New Species Of The Languidoides Group And Redescriptions Of D Brevifurcus Ishida 2006 And D Suoensis Ito 1954 Crustacea Copepoda Cyclopoida

Endemism of subterranean Diacyclops in Korea and Japan  with descriptions of seven new species of the languidoides group and redescriptions of D  brevifurcus Ishida  2006 and D  suoensis Ito  1954  Crustacea  Copepoda  Cyclopoida  PDF
Author: Tomislav Karanovic
Publisher: PenSoft Publishers LTD
ISBN: 9546426709
Size: 74.51 MB
Format: PDF, ePub
Category :
Languages : en
Pages : 76
View: 2953

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This work explores for the first time comprehensively the diversity and endemism of subterranean copepod crustaceans from the genus Diacyclops in the Far East. Previous scarce records have indicated presence of only a few widely distributed species, despite relative isolation of subterranean habitats in this part of the world and very dynamic changes in topography during the Pleistocene glacial cycles. A wide range of samples from Korea and Japan are studied, and all previous records of subterranean Diacyclops are re-evaluated. Morphological analyses of microcharacters, many of which are used in cyclopoid taxonomy for the first time herein, reveal high diversity in both countries. No subterranean species is found in common, although the existence of four sibling species pairs is probably indicative of relatively recent speciation. Seven species are described as new to science and two are re-described. This research provides evidence for the importance of subterranean habitats as reservoirs of biodiversity, and also demonstrates the inadequacy of current morphological methods for identifying closely related species of copepods. The disproportionately high diversity and short-range endemism discovered around Lake Biwa provides further evidence for the role of ancient lakes as biodiversity pumps for subterranean habitats.