The fossils were described in 1999 by Bonaparte and Mateus, after excavations that lasted from 1987, the year of its discovery, to 1992.
The type and only species is Kaatedocus siberi, described in 2012 by Emanuel Tschopp and Octávio Mateus.
Its first remains were found at Peralta, near Lourinhã, Portugal in 1982, but were not described until 1998, by Portuguese paleontologist Octávio Mateus.
It was first named by Adam S. Smith, Ricardo Araújo and Octávio Mateus in 2012 and the type species is Lusonectes sauvagei.
Octavio Paz | Octávio Mateus | Octavio Meyran | Octavio | São Mateus River | São Mateus | Octavio Dotel | São Mateus, Espírito Santo | São Mateus do Sul | Octavio M. Salati | Octávio Machado | Octávio de Sá |
The paleontological research has been conducted by the paleontologists Miguel Telles Antunes, Octávio Mateus and others, in association with the Universidade Nova de Lisboa.