Taxonomy
Taxonomy of Axonophora from Maletz (2014): *Infraorder † Diplograptina Lapworth, 1880e **Family † Diplograptidae Lapworth, 1873b ***Subfamily † Diplograptinae Lapworth, 1873b ***Subfamily † Orthograptinae Mitchell, 1987 **Family † Lasiograptidae Lapworth, 1880e **Family † Climacograptidae Frech, 1897 **Family † Dicranograptidae Lapworth, 1873b ***Subfamily † Dicranograptinae Lapworth, 1873b ***Subfamily † Nemagraptinae Lapworth, 1873 *Infraorder † Neograptina Štorch et al., 2011 **(Unranked) ***Family † Normalograptidae Štorch & Serpagli, 1993 ***Family † Neodiplograptidae Melchin et al., 2011 ****Subfamily † Neodiplograptinae Melchin et al. 2011 ****Subfamily † Petalolithinae Bulman, 1955 **Superfamily † Retiolitoidea Lapworth, 1873b ***Family † Retiolitidae Lapworth, 1873b (retiolitids) ****Subfamily † Retiolitinae Lapworth, 1873 ****Subfamily † Plectograptinae Bouček & Münch, 1952 **Superfamily † Monograptoidea Lapworth, 1873 ***Family † Dimorphograptidae Elles & Wood, 1908 ***Family †References
Graptolites Prehistoric hemichordates Animal suborders {{Hemichordate-stub