Amphibetaeus jousseaumei (Coutière, 1896)
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| Original Description | Betaeus jousseaumei Coutière, 1896b: 313, figs. 1-12; Coutière, 1896c: 236. |
| Classification | Arthropoda: Crustacea: Malacostraca: Decapoda: Alpheidae. |
| Synonymy | None. |
| Type Locality | Djibouti and Perim Island, Yemen (symbol  on the map). |
| Type Material | MNHN: claw of lectotype (MNHN-Na 13677). |
| Common Name | Amphibetaeus. |
| Taxonomic Status | Valid. |
| Geographic Distribution | Tropical Indian Ocean: presently known only from the Bab-el-Mandeb area in the Gulf of Aden (see map). |
| Frequency | Probably rare. |
| Habitat | Sand flats with coral rubble and mud, close to coral reefs. |
| Depth Range | Intertidal. |
| Life History and Behavior | Possibly associated with the ghost shrimp, Neocallichirus mucronautus, as well as sipunculans and echiurans; aggressive but apparently non-snapping (Coutière, 1899; Anker and Jeng, 2006). |
| Related Species | None. |
| Size | Body length to about 36 mm. |
| Color Pattern | Whitish, with pinkish on distal portion of the major chela (Coutière, 1899). |
| Molecular Sequence Data | None. |
| Remarks | One of the most enigmatic alpheid genera, not collected again since the original description by Henri Coutière in 1896. |
| Major References | Coutière, 1896b; Coutière, 1896c [original description and illustrations]; Coutière, 1899 [additional figures, life history observations, description of color pattern]; Anker and Jeng, 2006 [summarizing redescription, lectotype designation]; Anker et al. 2006a [phylogenetic position]. |