Spermatology in the Acari: systematic and functional implications

摘要: Sperm ultrastructure in the Acari is reflected against background of current knowledge on arachnid and xiphosuran sperm cells. possess highly diverse, aflagellate spermatozoa. The division into no more than two major groups — Anactinotrichida Actinotrichida supported by spermatological results. Within both it possible to distinguish between plesiomorphic apomorphic types with taxon-specific characteristics. Spermatozoa are delivered from male a transport form, which specifically altered female (capacitation), process known Ixodida, Varroidae, Bdellidae, Tetranychidae, Acaridida. Since related mode insemination fertilization conditions, some functional interpretations included special regard Anactinotrichida/Gamasida. An hypothesis outlined could describe steps evolution podospermy.