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Genus	Species
Alpharetrovirus	21
Betaretrovirus	26
Bovispumavirus	1
Deltaretrovirus	9
Epsilonretrovirus	3
Equispumavirus	1
Felispumavirus	2
Gammaretrovirus	49
Intracisternal A-particles	6
Lentivirus	21
Prosimiispumavirus	1
Simiispumavirus	15
Spumavirus	11