The giant Cockroach, Aphthoroblattina (1906)

Phylum : Arthropoda Class : Insescta Order : Blattoptera Family : Archimylacridae Subfamily : Archimylacrinae Genus : Aphthoroblattina Species : A. carbonis, A. eggintoni, A. fascigera, A. handlirschi, A. irregularis, A. johnsoni, A. sulcata

Apthoroblattina is an extinct genus of primitive cockroach from the Carboniferous Period. Fossils of the genus have been found in England, Wales, the United States, and Russia. The paratype specimen for the species A. johnsoni is recorded to have a total length of 43mm and a width of 38mm, while the type specimens of A.sulcata is noted to have been up to 45mm in length and 25 mm in width if complete.