The group of species considered all have short moderate snouts and a group of
slightly to strongly enlarged teeth on the lower pharyngeal bone, the anterior and
lateral teeth of which are bicuspid, with the posterior cusp turned forwards.
Lethrinops parvidens Trewavas, L. aurita (Regan), L. macrophthalmus
(Boulenger), L. macrochir (Regan), L. longimanus Trewavas and L.
macracanthus Trewavas are re-described, and L. mylodon n. sp. is described,
the latter being divided into two geographically seperated [sic] sub-species. While
L. longimanus and L. macracanthus co-exist with very slight overlap
of morphological characters in the south of Lake Malawi, an apparently intermediate
population is reported from another part of the Lake.