The Argasidae, Ixodidae and Nuttalliellidae (Acari: Ixodida) of the world: a list of valid species names', Zootaxa 2528, 2010, pp. 1-28. (enciklopedija.lv)
While there are 800 species, they belong to either one of two families: Ixodidae, known as hard ticks, and the Argasidae, or soft ticks. (newdaypestcontrol.com)
Hard ticks1
There are 2 major tick families (865 tick species world- cording to 16S rDNA gene comparisons, they are closely wide): the Ixodidae, or hard ticks, characterized by a related to the genera Brucella and Agrobacterium ( 1 ). (cdc.gov)
Species1
Nuttalliellidae, is represented by a single species that is tion that can cause either vascular proliferative lesions or confi ned to southern Africa. (cdc.gov)
Ticks2
Ticks (Acari: Ixodidae) are hematophagous arthropods and act as vectors for various infectious pathogens. (biomedcentral.com)