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Genus	Species
Alpharetrovirus	22
Betaretrovirus	27
Bovispumavirus	1
Deltaretrovirus	10
Epsilonretrovirus	4
Equispumavirus	1
Felispumavirus	2
Gammaretrovirus	49
Intracisternal A-particles	6
Lentivirus	21
Prosimiispumavirus	1
Simiispumavirus	24