Protognathodus

{{Short description|Extinct genus of jawless fishes}}

{{Italic title}}

{{taxobox

|name = Protognathodus

| fossil_range = Devonian/Carboniferous

| regnum = Animalia

| phylum = Chordata

| classis = †Conodonta

| ordo = †Ozarkodinida

| familia = †Idiognathodontidae

| genus = †Protognathodus

| genus_authority = Ziegler 1969

| subdivision_ranks = Species

| subdivision =

• †Protognathodus collinsoni
• †Protognathodus kockeli
• †Protognathodus kuehni
• †Protognathodus meischneri

| synonyms = Protognathus (preoccupied by Protognathus Basilewsky 1950, which is considered syn. of Pseudognathaphanus Schauberger, 1932)

}}

Protognathodus is an extinct conodont genus in the family Idiognathodontidae.