Micropenaeus tenuirostris was named by Bravi and Garassino (1998). Its type specimen is Museo di Paleontologia di Napoli M21833, a carapace, and it is a compression fossil. Its type locality is Le Cavere site, Pietraroia (Museo Napoli collection), which is in an Albian lagoonal/restricted shallow subtidal lime mudstone in Italy. It is the type species of Micropenaeus.