The Collared Lemur (Eulemur collaris) is a monotypic species and thus has no subspecies. I think you're being confused by the fact that is was once considered to be a ssp of Common Brown Lemur (Eulemur fulvus), as were the White-Fronted Lemur (E. albifrons), White-Collared Lemur (E. cinereiceps), *Red-Fronted Lemur (E. rufifrons), and Sanford's Lemur (E. sanfordi).
*I suppose the Red Lemur (Eulemur rufus) also was once considered a subspecies of Common Brown Lemur (E. fulvus) as it was once considered the same species as the Red-Fronted Lemur (E. rufifrons).
