Two
species are known,
K. clarki and
K. arenula. Originally considered a
crown lorisid, more comprehensive
phylogenetic analyses suggest it is a more
basal to crown lorisiformes.
K. clarki was described in 2003 from isolated
teeth and jaw fragments found in Late Middle
Eocene (
c. 40 million years ago) sediments of the
Birket Qarun Formation in the Egyptian
Faiyum. The
specimens indicate the presence of a
toothcomb, making it the earliest fossil primate to indisputably bear this trait, which is unique to all living
strepsirrhines (
lemurs,
lorises, and
galagos). In 2010 a second species,
K. arenula, was described in the journal
Nature from Late Middle
Eocene rocks in
Libya. == Palaeobiology ==