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Antarctic Halacaroidea

Antarctic Halacaroidea

Irwin M. Newell (Editor)

ISBN: 978-1-118-66512-1 March 2013 American Geophysical Union 284 Pages

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Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 40.

The Halacaroidea (Acari) from the Antarctic and sub-Antarctic (including Tierra del Fuego, Falkland Islands, South Georgia, South Sandwich Islands, Kerguelen, Macquarie Islands, and Auckland Island) are described. Halacaroidea from north of latitude 50°S are treated when zoogeographically significant. Species from Chile and the southeast Pacific are included, and a few species recorded from Peru and South Africa. Mites were collected from a variety of intertidal and subtidal habitats to a depth of 4100 m. The sub-families Rhombognathinae Viets, Lohmannellinae Viets, and Halacarinae Murray are raised to the corresponding family ranks: Rhombognathidae, Lohmannellidae, and Halacaridae. The generic composition of the latter two groups is changed. Fifteen genera are diagnosed: Acatacarus Schulz, Agaue Lohmann, Agauopsis Viets, Arhodeoporus Newell, Bradyagaue Newell, Copidognathus Trouessart, Halacarus Gosse, Isobactrus Newell, Lohmannella Trouessart, Parahalixodes Laubier, Rhombosnathus Trouessart, Scaptognathus Trouessart, Simognathus Trouessart, Thalassarachna Packard, and Werthella Lohmann. Three new genera, Camactognathus, Mictognathus, and Winlundia, are proposed; 115 new species are described; six new synonymies are established; three subspecies are given specific status; and three species are renamed. Tabular keys to the genera and species are presented (including taxonomically important species groups from other regions). The structure of the Halacaroidea is reviewed. Techniques for collecting, sorting, and mounting Halacaroidea are given.

Acknowledgments ix

Abstract xi

Introduction 1

Structure of the Halacaroidea 1

Development 7

Methods 7

Systematic section 8

Tabular key to the genera of Halacaroidea known from the Antarctic 11

Family Rhombognathidae Viets 15

Genus Rhombognathus Trouessart 15

Genus Isobactrus Newell 30

Genus Rhombognathides Viets 36

Family Halacaridae Murray 37

Subfamily Halacarinae Murray 37

Genus Halacarus Gosse 37

Genus Agaue Lohmann 69

Genus Bradyagaue Newell 81

Genus Thalassarachna Packard 89

Genus Copidognathus Trouessart 119

Genus Winlundia Newell, new genus 197

Genus Camactognathus Newell, new genus 201

Genus Arhodeoporus Newell 202

Genus Werthella Lohmann 204

Genus Mictognathus Newell, new genus 211

Genus Agauopsis Viets 215

Genus Actacarus Schulz 242

Subfamily Halixodinae Viets 247

Genus Parhalixodes Laubier 247

Family Lohmannellidae Viets 248

Genus Lohmannella Trouessart 248

Genus Simosnathus Trouessart 264

Genus Scapto8nathus Trouessart 272

Appendix: Valid names and synonyms in literature on Antarctic

Halacaroidea 277

Refreences 281