MOBI Dragonfly Nymphs of North America: An Identification Guide ↠ the website shop.co.uk

➧ [Ebook] ➢ Dragonfly Nymphs of North America: An Identification Guide By Kenneth J. Tennessen ➲ – The-website-shop.co.uk This monograph is the first of its kind devoted entirely to the dragonfly nymphs of North America north of Mexico the focus being accurate identification of the 330 species of Anisoptera that occur inThis monograph is the first of its kind devoted entirely to the dragonfly nymphs of North America north of Mexico the focus being accurate identification of the 330 species of Anisoptera that occur in the region Nymphal external morphology is described and illustrated in detail and all terms needed to navigate the dichotomous keys are defined Species are tabulated with references that provide the most detailed accurate descriptions for each; species that are inadeuately described are so indicated The key separating the seven families in the region contains several new characters The families are then covered separately Aeshnidae 13 genera Gomphidae 17 genera Petaluridae 2 genera Cordulegastridae 2 genera Macromiidae 2 genera Corduliidae 7 genera and Libellulidae 29 genera Each family is further characterized followed by a generic key A drawing of the habitus and diag.

Nostic details for each genus are provided along with additional diagnostic remarks and notes on habitat and life cycle; for each genus a map shows its geographic distribution in North America Full grown nymphs of all known species of each genus are keyed and diagnosed; characters that apply to earlier instars are noted Morphological variation in character states was analyzed in order to assess the reliability of previously utilized characters and to discover new characters Most of the characters used to distinguish all levels of taxa are illustrated; a total of 702 figures comprising 1800 original drawings along with selected photographs where necessary for clarity accompany the keys Measurements of total length head width and other variables for each species are provided in tables Difficulties with past keys and descriptions including errors omissions and other sho.

MOBI Dragonfly Nymphs of North America: An Identification Guide ↠ the website shop.co.uk

MOBI Dragonfly Nymphs of North America: An Identification Guide ↠ the website shop.co.uk

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