Aye
Ayersacarus Hunter, 1964
- Ayersacarus gelidus Hunter, 1965
- Ayersacarus gressitti Hunter, 1964
- Ayersacarus plumapilus Hunter, 1964
- Ayersacarus strandtmanni Hunter, 1964
Arachnida → Mesostigmata → Dermanyssidae
Aym
Aymaria Huber, 2000
- Aymaria calilegua Huber, 2000
- Aymaria conica (Banks, 1902) tipična vrsta
- Aymaria dasyops (Mello-Leitão, 1947)
- Aymaria floreana (Gertsch & Peck, 1992)
- Aymaria insularis (Banks, 1902)
- Aymaria jarmila (Gertsch & Peck, 1992)
- Aymaria pakitza Huber, 2000
Arachnida → Araneae → Pholcidae
Ays
Aysenia Tullgren, 1902
- Aysenia araucana Ramírez, 2003
- Aysenia barrigai Izquierdo & Ramírez, 2008
- Aysenia cylindrica Ramírez, 2003
- Aysenia elongata Tullgren, 1902
- Aysenia segestrioides Ramírez, 2003
Arachnida → Araneae → Anyphaenidae
Aysenoides Ramirez, 2003
- Aysenoides colecole Ramírez, 2003
- Aysenoides nahuel Izquierdo & Ramírez, 2008
- Aysenoides parvus Ramírez, 2003
- Aysenoides simoi Laborda, Ramírez & Pizarro-Araya, 2013
- Aysenoides terricola Ramírez, 2003
Arachnida → Araneae → Anyphaenidae
Aysha Keyserling, 1891
- Aysha affinis (Blackwall, 1862)
- Aysha albovittata Mello-Leitão, 1944
- Aysha basilisca (Mello-Leitão, 1922)
- Aysha bonaldoi Brescovit, 1992
- Aysha boraceia Brescovit, 1992
- Aysha borgmeyeri (Mello-Leitão, 1926)
- Aysha brevimana (C. L. Koch, 1839)
- Aysha caxambuensis (Mello-Leitão, 1926)
- Aysha chicama Brescovit, 1992
- Aysha clarovittata (Keyserling, 1891)
- Aysha curumim Brescovit, 1992
- Aysha diversicolor (Keyserling, 1891)
- Aysha ericae Brescovit, 1992
- Aysha fortis (Keyserling, 1891)
- Aysha guaiba Brescovit, 1992
- Aysha guarapuava Brescovit, 1992
- Aysha helvola (Keyserling, 1891)
- Aysha heraldica (Mello-Leitão, 1929)
- Aysha insulana Chickering, 1937
- Aysha janaita Brescovit, 1992
- Aysha lagenifera (Mello-Leitão, 1944)
- Aysha lisei Brescovit, 1992
- Aysha marinonii Brescovit, 1992
- Aysha montenegro Brescovit, 1992
- Aysha piassaguera Brescovit, 1992
- Aysha pirassununga Brescovit, 1992
- Aysha proseni Mello-Leitão, 1944
- Aysha prospera Keyserling, 1891
- Aysha robusta (Keyserling, 1891)
- Aysha rubromaculata (Keyserling, 1891)
- Aysha strandi (Caporiacco, 1947)
- Aysha striolata (Keyserling, 1891)
- Aysha subruba (Keyserling, 1891)
- Aysha taeniata (Keyserling, 1891)
- Aysha taim Brescovit, 1992
- Aysha tapejara Brescovit, 1992
- Aysha tertulia Brescovit, 1992
- Aysha triunfo Brescovit, 1992
- Aysha vacaria Brescovit, 1992
- Aysha yacupoi Brescovit, 1992
- Aysha zenzesi (Mello-Leitão, 1945)