TrematocranusTrematocranus is a small genus of haplochromine cichlids endemic to Lake Malawi.SpeciesThere are currently four recognized species in this genus, with a new species described in 2018.Trematocranus brevirostris Trewavas, 1935 Trematocranus labifer Trematocranus microstoma Trewavas, 1935 Trematocranus pachychilus Dierickx, Hanssens, Rusuwa, Snoeks, 2018 ''Trematocranus placodon''