| Diposthidae Asthenoceros Laidlaw, 1903 | | - | primary taxonomic authority (describer) | 302 |
| Asthenoceros woodworthi Laidlaw, 1903 | | - | primary taxonomic authority (describer) | 302 |
| Pseudoceros regalis Laidlaw, 1903 | | w | primary taxonomic authority (describer) | |
| Pseudobiceros bedfordi (Laidlaw, 1903) | | - | primary taxonomic authority (describer) | 302, 314, Pl. 23, fig. 9 |
| Euplana malayana (Laidlaw, 1903) | | w | primary taxonomic authority (describer) | 302 |
| Euplanoida malayana (Laidlaw, 1903) | [with synonyms] | w | primary taxonomic authority (describer) | 302 |
| Euplanoida penangensis (Laidlaw, 1903) | | w | primary taxonomic authority (describer) | 302 |
| Semonia penangensis Laidlaw, 1903 | | w | primary taxonomic authority (describer) | 302 |
| Leptoplana malayana Laidlaw, 1903 | | w | primary taxonomic authority (describer) | |
| Notoplanidae Notoplana Laidlaw, 1903 | [with synonyms] | w | primary taxonomic authority (describer) | 301, 302, 305 |
| Notoplana evansii Laidlaw, 1903 | | w | primary taxonomic authority (describer) | 301 |
| Bergendalia anomala Laidlaw, 1903 | [with synonyms] | w | primary taxonomic authority (describer) | 302 |
| Latocestus argus Laidlaw, 1903 | [with synonyms] | w | primary taxonomic authority (describer) | 302 |
| Diposthidae Asthenoceros Laidlaw, 1903 | | w | primary taxonomic authority (describer) | 302, 515 |
| Pseudoceros bedfordii Laidlaw, 1903 | | w | primary taxonomic authority (describer) | 302 |
| Pseudobiceros bedfordi (Laidlaw, 1903) | [with synonyms] | w | primary taxonomic authority (describer) | 302, 314 |
| Pseudoceros collingwoodii Laidlaw, 1903 | [with synonyms] | w | primary taxonomic authority (describer) | 314 |
| Eulatocestus pacificus (Laidlaw, 1903) | [with synonyms] | w | primary taxonomic authority (describer) | 3 |
| Latocestus pacificus Laidlaw, 1903 | | w | primary taxonomic authority (describer) | 3 |
| Prosthiostomum pallidum Laidlaw, 1903 | [with synonyms] | w | primary taxonomic authority (describer) | 302 |
| Pseudoceros rubellus Laidlaw, 1903 | [with synonyms] | w | primary taxonomic authority (describer) | 302 |
| Asthenoceros woodworthi Laidlaw, 1903 | [with synonyms] | w | primary taxonomic authority (describer) | 302 |
| Polyposthiidae I Bergendalia Laidlaw, 1903 | | w | primary taxonomic authority (describer) | 302, 310, 312 |
| Leptoplanoidea Cryptocelidae Laidlaw, 1903 | | w | other taxonomic work | |
| Discoceloidea Cryptocelididae Laidlaw, 1903 [sensu Prudhoe (1985)] | [with synonyms] | w | other taxonomic work | |
| Laidlawiana penangensis (Laidlaw, 1903) | [with synonyms] | - | primary taxonomic authority (describer) | |