Microderoceras is a flat sided, evolute, radially ribbed Lower Jurassic ammonite belonging to the ammonitid family Eoderoceratidae and superfamily Eoderoceratoidea.

Its whorls are subquadrangular in section; venter on the outer rim, rounded; sides with two rows if distinct spines, tubercles on internal molds, formed at either end of the ribs.

The lateral surface of the ribcage is concave toward both sides, the lateral side of the dorsal and the lateral side of the ventral surface.

[citation needed] These shelled cephalopods, named by Alpheus Hyatt in 1871, are part of the now extinct Ammonoidea, which are distinct from the shelled nautiloids still found living today.

Microderoceras specimens are found in Argentina, Canada and the United Kingdom.