Prototrox

{{Short description|Species of beetles}}

{{Italic title}}

{{Taxobox

| regnum = Animalia

| phylum = Arthropoda

| classis = Insecta

| ordo = Coleoptera

| subordo = Polyphaga

| familia = Trogidae

| subfamilia = †Prototroginae

| genus = †Prototrox

| species = †Prototrox transbaikalicus

| species_authority = Nikolajev, 2000

}}

Prototrox transbaikalicus is an extinct, fossil species of hide beetle that lived in modern-day regions of Mongolia and Transbaikalia during the Lower Cretaceous. P. transbaikalicus is the only species of both the genus Prototrox and the subfamily Prototroginae.{{cite journal|last1=Nikolajev|first1=G. V.|url=https://www.zin.ru/animalia/Coleoptera/pdf/nikolajev_2000_prototroginae_pj.pdf|title=A New Subfamily of Lamellicorn Beetles (Coleoptera, Scarabaeoidae) from the Lower Cretaceous of Transbaikalia and Mongolia, and Its Position within the Superfamily|journal=Paleontological Journal|volume=34|issue=4|language=en|pages=63–66|date=2000}}{{cite web|url=https://animaldiversity.org/accounts/Prototrox/classification/#Prototrox|title=Prototrox|publisher=Animal Diversity Web}}