Leiothorax

{{Short description|Extinct genus of crustaceans}}

{{Taxobox

| fossil_range = {{fossil_range|Triassic}}

| regnum = Animalia

| phylum = Arthropoda

| subphylum = Crustacea

| classis = Malacostraca

| ordo = Decapoda

| infraordo = Caridea

| superfamilia = incertae sedis

| genus = Leiothorax

| genus_authority = Pinna, 1974

| species = L. triasicus

| binomial = Leiothorax triasicus

| binomial_authority = Pinna, 1974

}}

Leiothorax is an extinct genus of shrimp in the order Decapoda.{{cite journal |journal=Raffles Bulletin of Zoology |year=2009 |volume=Suppl. 21 |pages=1–109 |title = A classification of living and fossil genera of decapod crustaceans |author1=Sammy De Grave |author2=N. Dean Pentcheff |author3=Shane T. Ahyong |url=https://decapoda.nhm.org/pdfs/31051/31051.pdf|display-authors=etal}} It contains the species Leiothorax triasicus.Page 59, Bibliographie des sciences de la terre, Volume 37, Centre national de la recherche scientifique (France). Centre de documentation scientifique et technique, 1976.