Extraordinary evidence of internal fertilization in a placoderm was afforded by the discovery in the Gogo Formation, near Fitzroy Crossing, Kimberley, Western Australia, Long & Trinajstic 2010 of a small female placoderm, about 25 cms in length, which died in the process of giving birth to a 6 cm (2 in) offspring and was fossilized with the umbilical cord intact.