title: COLD HARDINESS AND RANGE OF THE MYRIAPOD Angarozonium amurense (POLYZONIIDAE, DIPLOPODA, ARTHROPODA) IN PERMAFROST ENVIRONMENTS.
abstract: BACKGROUND
  Angarozonium amurense (Gerstfeldt, 1859) is the only one out of more than a hundred diplopod species described in Siberia and the Far East that inhabits regions with solid permafrost.
  
  
  OBJECTIVE
  To evaluate the cold hardiness of A. amurense that allows this species to inhabit permafrost regions.
  
  
  METHODS
  The survival temperature thresholds and supercooling points (SCP) were measured.
  
  
  RESULTS
  The temperature thresholds for adult animal survival are -8.5 C in summer and -27 C in winter. Average SCP decreases from -7.7 in summer to -16.9 in winter. Water content decreases from 55.7% in summer to 49.4% in winter.
  
  
  CONCLUSIONS
  The cold hardiness of A. amurense sets the record in this class of animals. It allows it to overwinter in the upper 15 centimeters layer of soil in most biotopes of the coldest permafrost regions in North Asia.
authors.affiliation: Laboratory of Biocenology, Institute of Biological Problems (North, Far East Branch), Russian Academy of Sciences, Magadan, Russia;
authors.forename: D I
authors.initials: DI
authors.lastname: Berman
authors.affiliation: Laboratory of Biocenology, Institute of Biological Problems (North, Far East Branch), Russian Academy of Sciences, Magadan, Russia; aborigen@ibpn.ru.
authors.forename: E N
authors.initials: EN
authors.lastname: Meshcheryakova
authors.affiliation: Laboratory of Entomology, Institute of Biology and Pedology (Far East Branch), Russian Academy of Sciences, Vladivostok, Russia.
authors.forename: E V
authors.initials: EV
authors.lastname: Mikhaljova
mesh_terms: D000064:Acclimatization; D000818:Animals; D001181:Arthropods / Q000502:physiology*; D003080:Cold Temperature; D065946:Permafrost; D012621:Seasons; D014867:Water / Q000378:metabolism
chemical_list: D014867:Water