Bitaunioceras

{{Short description|Genus of molluscs (fossil)}}

{{Italic title}}

{{Taxobox

| name = Bitaunioceras

| fossil_range = Permian

| image =

| regnum = Animalia

| phylum = Mollusca

| classis = Cephalopoda

| subclassis = Nautiloidea

| ordo = Orthocerida

| superfamilia = Orthocerataceae

| familia = Orthoceratidae

| subfamilia = Michelinoceratinae

| genus = Bitaunioceras

| genus_authority = Shimizy & Obata, 1936

}}

Bitaunioceras is a genus of Permian orthocerids with a gradually expanding, straight, orthodontic shell with straight transverse sutures and a small, subcentral siphuncle with straight tubular orthochromatic necks.

The shell surface of Bitaunioceras has a few, shallow, rounded constrictions and numerous, unequal, prominent transverse wire-like lirae.

Bitaunioceras species have been found in Texas in the United States, Coahuila in Mexico, Sicily, Timor, and the south Urals in Russia.