Species described (154):
- Melanochromis labrosus Trewavas, 1935 (Abactochromis), valid
- Aristochromis christyi Trewavas, 1935 (Aristochromis), valid
- Haplochromis dolorosus Trewavas, 1933 (Astatotilapia), valid
- Haplochromis elegans Trewavas, 1933 (Astatotilapia), valid
- Haplochromis engystoma Trewavas, 1933 (Astatotilapia), valid
- Haplochromis velifer Trewavas, 1933 (Astatotilapia), valid
- Trematocranus auditor Trewavas, 1935 (Aulonocara), valid
- Aulonocara macrochir Trewavas, 1935, synonym
- Aulonocara maylandi Trewavas, 1984 (Aulonocara), valid
- Aulonocara rostrata Trewavas, 1935 (Aulonocara), valid
- Chromidotilapia finleyi Trewavas, 1974 (Benitochromis), valid
- Haplochromis heterotaenia Trewavas, 1935 (Buccochromis), valid
- Haplochromis spectabilis Trewavas, 1935 (Buccochromis), valid
- Haplochromis orthognathus Trewavas, 1935 (Caprichromis), valid
- Chetia flaviventris Trewavas, 1961 (Chetia), valid
- Haplochromis euchilus Trewavas, 1935 (Chilotilapia), valid
- Christyella nyasana Trewavas, 1935, synonym
- Pelmatochromis loennbergi Trewavas, 1962 (Chromidotilapia), subspecies
- Haplochromis cyaneus Trewavas, 1935 (Copadichromis), valid
- Haplochromis pleurostigma Trewavas, 1935 (Copadichromis), valid
- Corematodus taeniatus Trewavas, 1935 (Corematodus), valid
- Haplochromis nitidus Trewavas, 1935 (Ctenopharynx), valid
- Haplochromis pictus Trewavas, 1935 (Ctenopharynx), valid
- Cyathochromis obliquidens Trewavas, 1935 (Cyathochromis), valid
- Diplotaxodon argenteus Trewavas, 1935 (Diplotaxodon), valid
- Genyochromis mento Trewavas, 1935 (Genyochromis), valid
- Limnochromis christyi Trewavas, 1953 (Greenwoodochromis), valid
- Haplochromis annectidens Trewavas, 1933 (Haplochromis), valid
- Haplochromis beadlei Trewavas, 1933 (Haplochromis), valid
- Haplochromis festivus Trewavas, 1935, synonym
- Haplochromis gowersii Trewavas, 1928 (Haplochromis), valid
- Haplochromis labiatus Trewavas, 1933 (Haplochromis), valid
- Haplochromis limax Trewavas, 1933 (Haplochromis), valid
- Haplochromis lobochilus Trewavas, 1935, synonym
- Haplochromis maxillaris Trewavas, 1928 (Haplochromis), valid
- Haplochromis melanopterus Trewavas, 1928 (Haplochromis), valid
- Haplochromis michaeli Trewavas, 1928 (Haplochromis), valid
- Haplochromis obtusidens Trewavas, 1928 (Haplochromis), valid
- Haplochromis oculatus Trewavas, 1935, synonym
- Haplochromis pardalis Trewavas, 1935, synonym
- Haplochromis polyodon Trewavas, 1935, synonym
- Haplochromis prodomus Trewavas, 1935 (Haplochromis), valid
- Haplochromis semipalatus Trewavas, 1935, synonym
- Haplochromis taurinus Trewavas, 1933 (Haplochromis), valid
- Haplochromis vicarius Trewavas, 1933 (Haplochromis), valid
- Haplochromis spilopterus Trewavas, 1935 (Hemitaeniochromis), valid
- Konia dikume Trewavas, 1972 (Konia), valid
- Tilapia eisentrauti Trewavas, 1962 (Konia), valid
- Labidochromis vellicans Trewavas, 1935 (Labidochromis), valid
- Lamprologus pleuromaculatus Trewavas & Poll, 1952 (Lepidiolamprologus), valid
- Lethrinops alta Trewavas, 1931 (Lethrinops), valid
- Lethrinops christyi Trewavas, 1931 (Lethrinops), valid
- Lethrinops furcifer Trewavas, 1931 (Lethrinops), valid
- Lethrinops longimanus Trewavas, 1931 (Lethrinops), valid
- Lethrinops lunaris Trewavas, 1931 (Lethrinops), valid
- Lethrinops macracanthus Trewavas, 1931 (Lethrinops), valid
- Lethrinops microstoma Trewavas, 1931 (Lethrinops), valid
- Lethrinops oculata Trewavas, 1931, synonym
- Lethrinops parvidens Trewavas, 1931 (Lethrinops), valid
- Lichnochromis acuticeps Trewavas, 1935 (Lichnochromis), valid
- Melanochromis melanopterus Trewavas, 1935 (Melanochromis), valid
- Melanochromis robustus Johnson, 1975 (Melanochromis), valid
- Melanochromis vermivorus Trewavas, 1935 (Melanochromis), valid
- Myaka myaka Trewavas, 1972 (Myaka), valid
- Haplochromis balteatus Trewavas, 1935 (Mylochromis), valid
- Haplochromis epichorialis Trewavas, 1935 (Mylochromis), valid
- Haplochromis formosus Trewavas, 1935 (Mylochromis), valid
- Haplochromis gracilis Trewavas, 1935 (Mylochromis), valid
- Haplochromis incola Trewavas, 1935 (Mylochromis), valid
- Haplochromis labidodon Trewavas, 1935 (Mylochromis), valid
- Haplochromis mola Trewavas, 1935 (Mylochromis), valid
- Haplochromis mollis Trewavas, 1935 (Mylochromis), valid
- Haplochromis obtusus Trewavas, 1935 (Mylochromis), valid
- Haplochromis spilostichus Trewavas, 1935 (Mylochromis), valid
- Haplochromis chrysogaster Trewavas, 1935 (Naevochromis), valid
- Lamprologus christyi Trewavas & Poll, 1952 (Neolamprologus), valid
- Lamprologus savoryi pulcher Trewavas & Poll, 1972 (Neolamprologus), valid
- Lamprologus sexfasciatus Trewavas & Poll, 1952 (Neolamprologus), valid
- Haplochromis microcephalus Trewavas, 1935 (Nyassachromis), valid
- Haplochromis nigritaeniatus Trewavas, 1935 (Nyassachromis), valid
- Haplochromis prostoma Trewavas, 1935 (Nyassachromis), valid
- Haplochromis purpurans Trewavas, 1935 (Nyassachromis), valid
- Haplochromis serenus Trewavas, 1935 (Nyassachromis), valid
- Sarotherodon angolensis Trewavas, 1973 (Oreochromis), valid
- Tilapia karongae Trewavas, 1941 (Oreochromis), valid
- Tilapia leucosticta Trewavas, 1933 (Oreochromis), valid
- Tilapia lidole Trewavas, 1941 (Oreochromis), valid
- Oreochromis (Nyasalapia) malagarasi Trewavas, 1983 (Oreochromis), valid
- Tilapia mortimeri Trewavas, 1966 (Oreochromis), valid
- Oreochromis macrochir mweruensis Trewavas, 1983 (Oreochromis), valid
- Oreochromis niloticus baringoensis Trewavas, 1983 (Oreochromis), subspecies
- Oreochromis niloticus filoa Trewavas, 1983 (Oreochromis), subspecies
- Oreochromis niloticus sugutae Trewavas, 1983 (Oreochromis), subspecies
- Tilapia vulcani Trewavas, 1933 (Oreochromis), subspecies
- Tilapia placida Trewavas, 1941 (Oreochromis), valid
- Tilapia ruvumae Trewavas, 1966 (Oreochromis), subspecies
- Tilapia shirana chilwae Trewavas, 1966 (Oreochromis), subspecies
- Tilapia hornorum Trewavas, 1966 (Oreochromis), subspecies
- Haplochromis decorus Trewavas, 1935 (Otopharynx), valid
- Haplochromis heterodon Trewavas, 1935 (Otopharynx), valid
- Haplochromis ovatus Trewavas, 1935 (Otopharynx), valid
- Haplochromis speciosus Trewavas, 1935 (Otopharynx), valid
- Haplochromis tetraspilus Trewavas, 1935 (Otopharynx), valid
- Gobiochromis irvinei Trewavas, 1943 (Paragobiocichla), valid
- Nanochromis gabonicus Trewavas, 1975 (Parananochromis), valid
- Petrotilapia tridentiger Trewavas, 1935 (Petrotilapia), valid
- Haplochromis longimanus Trewavas, 1935 (Placidochromis), valid
- Haplochromis phenochilus Trewavas, 1935 (Placidochromis), valid
- Haplochromis fenestratus Trewavas, 1935 (Protomelas), valid
- Haplochromis insignis Trewavas, 1935 (Protomelas), valid
- Haplochromis labridens Trewavas, 1935 (Protomelas), valid
- Haplochromis marginatus Trewavas, 1935 (Protomelas), valid
- Haplochromis marginatus vuae Trewavas, 1935 (Protomelas), subspecies
- Haplochromis spilonotus Trewavas, 1935 (Protomelas), valid
- Haplochromis taeniolatus Trewavas, 1935 (Protomelas), valid
- Haplochromis triaenodon Trewavas, 1935 (Protomelas), valid
- Haplochromis virgatus Trewavas, 1935 (Protomelas), valid
- Haplochromis philander dispersus Trewavas, 1938 (Pseudocrenilabrus), subspecies
- Melanochromis brevis Trewavas, 1935 (Pseudotropheus), valid
- Pseudotropheus elegans Trewavas, 1935 (Pseudotropheus), valid
- Pseudotropheus fuscus Trewavas, 1935 (Pseudotropheus), valid
- Pseudotropheus lucerna Trewavas, 1935 (Pseudotropheus), valid
- Melanochromis perspicax Trewavas, 1935 (Pseudotropheus), valid
- Barombia maclareni Trewavas, 1962 (Pungu), valid
- Rhamphochromis brevis Trewavas, 1935 (Rhamphochromis), valid
- Pelmatochromis exsul Trewavas, 1933 (Rubricatochromis), valid
- Sarotherodon melanotheron paludinosus Trewavas, 1983, synonym
- Tilapia steinbachi Trewavas, 1962 (Sarotherodon), valid
- Haplochromis ahli Trewavas, 1935 (Sciaenochromis), valid
- Serranochromis janus Trewavas, 1964 (Serranochromis), valid
- Serranochromis spei Trewavas, 1964 (Serranochromis), valid
- Serranochromis stappersi Trewavas, 1964 (Serranochromis), valid
- Haplochromis pholidophorus Trewavas, 1935 (Stigmatochromis), valid
- Haplochromis pleurospilus Trewavas, 1935 (Stigmatochromis), valid
- Stomatepia mongo Trewavas, 1972 (Stomatepia), valid
- Stomatepia pindu Trewavas, 1972 (Stomatepia), valid
- Lethrinops cyrtonotus Trewavas, 1931 (Taeniolethrinops), valid
- Lethrinops furcicauda Trewavas, 1931 (Taeniolethrinops), valid
- Lethrinops laticeps Trewavas, 1931 (Taeniolethrinops), valid
- Haplochromis albolabris Trewavas & Thys Van Den Audenaerde, 1969 (Thoracochromis), valid
- Haplochromis bullatus Trewavas, 1938 (Thoracochromis), valid
- Haplochromis rudolfianus Trewavas, 1933 (Thoracochromis), valid
- Tilapia baloni Trewavas & Stewart, 1975 (Tilapia), valid
- Tilapia guinasana Trewavas, 1936 (Tilapia), valid
- Tilapia inducta Trewavas, 1933, synonym
- Lethrinops intermedia Trewavas, 1935 (Tramitichromis), valid
- Lethrinops lituris Trewavas, 1931 (Tramitichromis), valid
- Lethrinops trilineata Trewavas, 1931 (Tramitichromis), valid
- Lethrinops variabilis Trewavas, 1931 (Tramitichromis), valid
- Trematocranus brevirostris Trewavas, 1935 (Trematocranus), valid
- Haplochromis labifer Trewavas, 1935 (Trematocranus), valid
- Trematocranus microstoma Trewavas, 1935 (Trematocranus), valid
- Pseudotropheus tropheops gracilior Trewavas, 1935 (Tropheops), valid
- Pseudotropheus microstoma Trewavas, 1935 (Tropheops), valid
Genera described (19):
- Aristochromis Trewavas, 1935, valid
- Barombia Trewavas, 1962, synonym
- Chetia Trewavas, 1961, valid
- Christyella Trewavas, 1935, synonym
- Cyathochromis Trewavas, 1935, valid
- Diplotaxodon Trewavas, 1935, valid
- Genyochromis Trewavas, 1935, valid
- Konia Trewavas, 1972, valid
- Labidochromis Trewavas, 1935, valid
- Lichnochromis Trewavas, 1935, valid
- Melanochromis Trewavas, 1935, valid
- Myaka Trewavas, 1972, valid
- Petrotilapia Trewavas, 1935, valid
- Pterochromis Trewavas, 1973, valid
- Pungu Trewavas, 1972, valid
- Stomatepia Trewavas, 1962, valid
- Trematocranus Trewavas, 1935, valid
- Tristramella Trewavas, 1942, valid
- Tropheops Trewavas, 1984, valid