A redescription of Trombidium holosericeum [Linnaeus, 1758] [Acari: Actinotrichida: Trombidioidea] with characteristics of all active instars and notes on taxonomy and biology

A detailed redescription of Trombidium holoserieeum (L.), based on female is given. Characteristics of larvae, deutonymphs and adults as well as the data on their biology are provided. The selected neotype is a female, from which larvae have been obtained by experimental rearing. Teresothrombium is regarded as a new synonym of Trombidium. T. latum Koch, 1837 is a synonym of T. holosericeum, whereas T. latum s. Oudemans (1910,1937), André (1926), Thor and Willmann (1947) - a synonym of T. rimosum Koch, 1837. T. holosericeum displays an almost edaphic life style except during mating and the parasitic phase of larvae. The life cycle is uni- to semivoltine, females may be iteroparous. Data on host range of larvae and physiological properties of eggs and protonymphs are given.