Gemmotheres

{{Short description|Genus of crabs}}

{{Speciesbox

| name = Gemmotheres

| image = Gemmotheres chamae (10.1590-2358-2936e2020005) Figure 1.jpg

| genus = Gemmotheres

| parent_authority = Campos, 1996{{cite journal|journal=Raffles Bulletin of Zoology |date=2008 |volume=17 |pages=1–286 |title=Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world |author=Peter K. L. Ng |author2=Danièle Guinot |author3=Peter J. F. Davie |name-list-style=amp |url=http://rmbr.nus.edu.sg/rbz/biblio/s17/s17rbz.pdf |url-status=dead |archiveurl=https://web.archive.org/web/20110606061453/http://rmbr.nus.edu.sg/rbz/biblio/s17/s17rbz.pdf |archivedate=2011-06-06 }}

| species = chamae

| authority = (M. H. Roberts, 1975){{ITIS |id=621735 |taxon=Gemmotheres chamae (M. H. Roberts, 1975) |accessdate=June 16, 2011}}

| synonyms = Pinnotheres chamae M. H. Roberts, 1975

| synonyms_ref =

}}

Gemmotheres also known as the jewel-box pea crab,{{cite web|title=Gemmotheres chamae|url=https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=621735|publisher=Integrated Taxonomic Information System}} is a monotypic genus of pea crab, which was erected in 1996 to hold the species Gemmotheres chamae (formerly Pinnotheres chamae).{{cite journal |author=Ernesto Campos |date=1996 |title=Partial revision of pinnotherid crab genera with a two-segmented palp on the third maxilliped (Decapoda: Brachyura) |journal=Journal of Crustacean Biology |volume=16 |pages=556–563 |issue=3 |jstor=1548747 |doi=10.2307/1548747}} The species lives as a commensal of the corrugate jewelbox, Chama congregata.{{cite journal |author=Morris H. Roberts Jr. |date=1975 |title=Description of a pea crab, Pinnotheres chamae, sp. nov. from the jewel box, Chama congregata |journal=Chesapeake Science |volume=16 |issue=4 |pages=238–241 |doi=10.2307/1350942 |jstor=1350942}}