Anoxia tolerance in high Arctic terrestrial microarthropods

Abstract. 1. Ten Arctic species of Collembola and two species of cryptostigmatic mites survived anoxia at 5 °C over periods ranging from 1 to 36 days. 2. Highly active, surface‐dwelling collembolans such as Isotoma anglicana, Isotoma tschernovi, and Sminthurides malmgreni were the most susceptible to anoxia. Mites and Collembola living deeper in the soil or in wet habitats, such as Camisia anomia and Hypogastrura viatica, were most tolerant. Tolerance, however, appears more closely linked to taxonomic relatedness than to ecological groupings per se, although the two may coincide. 3. Implications for life‐history strategies, including metabolic cold adaptation in its broadest sense, are discussed.     

Species of the genus Crotonia (Acari: Cryptostigmata) from New Zealand

Five new species of Crotonia from New Zealand ( C. cervicorna, C. cupulata, C. longibulbula, C. tuberculata and C. reticulata ) are described as new, and two species ( C. cophinana (Michael 1908) and C. caudatis (Hammer 1966)) are redescribed. Five species groups of the genus are characterized and a key to the adequately described species of the world is presented.     

A new mite superfamily (Acari: Cryptostigmata)

The new superfamily Eutegaeoidea (Acari: Cryptostigmata) is defined and subdivided into three families, viz. Eutegaeidae, Compactozetidae nov., Pterozetidae nov. The Eutegaeidae is considered to possess six genera ( Eutegaeus, Neoeutegaeus, Neseutegaeus, Pareutegaeus, Birotegaeus nov., Atalotegaeus nov.), the Pterozetidae three genera ( Pterozetes, Porrhotegaeus, Dudichella ), and the Compactozetidae four genera ( Compactozetes, Bornebuschia, Hamotegeus, Sadocepheus ). Keys are provided to all taxa down to species and Pareutegaeus similis (Trägardh, 1931) is redescribed from the lectotype.