Included taxa
Simon, E. (1889b). Etudes arachnologiques. 21e Mémoire. XXXI. Descriptions d'espèces et the genres nouveaux de Madagascar et de Mayotte. Annales de la Société Entomologique de France (6) 8: 223-236. 
Species
| Species | Family | Page / figures | published as |
|---|---|---|---|
| Clitaetra episinoides | Araneidae | 226 (Df) | Clitaetra episinoides |
| Crustulina ambigua | Theridiidae | 229 (Df) | Crustulina ambigua |
| Diphya pumila | Tetragnathidae | 226 (Dm) | Diphya pumila |
| Exechocentrus lancearius | Araneidae | 227 (Df) | Exechocentrus lancearius |
| Genysa bicalcarata | Idiopidae | 235 (Dm) | Genysa bicalcarata |
| Geraesta hirta | Thomisidae | 225 (Dj) | Geraesta hirta |
| Omucukia angusta | Zodariidae | 231 (Dj) | Storenomorpha angusta |
| Paccius madagascariensis | Trachelidae | 232 (Dm) | Trachelas madagascariensis |
| Phycosoma excisum | Theridiidae | 231 (Df) | Trigonobothrys excisus |
| Poltys kochi | Araneidae | 225 | Poltys kochi |
| Poltys vesicularis | Araneidae | 225 (Dj) | Poltys vesicularis |
| Staianus acuminatus | Sparassidae | 224 (Dj) | Staianus acuminatus |
| Tallonia picta | Pisauridae | 223 (Dj) | Tallonia picta |
| Thelechoris striatipes | Ischnothelidae | 236 (Dmf) | Entomothele striatipes |
| Theridion decemperlatum | Theridiidae | 230 (Dm) | Mastostigmus decemperlatus |
| Theridula perlata | Theridiidae | 228 (Dm) | Theridula perlata |
| Thyreobaeus scutiger | Linyphiidae | 228 (Df) | Thyreobaeus scutiger |
| Viridasius fasciatus | Viridasiidae | 233 (Dm) | Viridasius pulchripes |
| Vulsor bidens | Viridasiidae | 233 (Df) | Vulsor bidens |
Genera
| Genus | Family | Page |
|---|---|---|
| Clitaetra Simon, 1889 | Araneidae | ? |
| Exechocentrus Simon, 1889 | Araneidae | ? |
| Genysa Simon, 1889 | Idiopidae | ? |
| Geraesta Simon, 1889 | Thomisidae | ? |
| Staianus Simon, 1889 | Sparassidae | ? |
| Tallonia Simon, 1889 | Pisauridae | ? |
| Thyreobaeus Simon, 1889 | Linyphiidae | ? |
| Viridasius Simon, 1889 | Viridasiidae | ? |
| Vulsor Simon, 1889 | Viridasiidae | ? |