Herringshaw, L. G.; Raine, R. J. (2007). "The earliest turrilepadid: A machaeridian from the Lower Ordovician of the Northwest Highlands". Scottish Journal of Geology. 43 (2): 97. Bibcode:2007ScJG...43...97H. doi:10.1144/sjg43020097. S2CID128899353.
Hogstrom, Anette E. S.; Taylor, Wendy L. (2001). "The Machaeridian Lepidocoleus Sarlei Clarke, 1896, from the Rochester Shale (Silurian) of New York State". Palaeontology. 44 (1): 113–130. Bibcode:2001Palgy..44..113H. doi:10.1111/1475-4983.00172.
Herringshaw, L. G.; Raine, R. J. (2007). "The earliest turrilepadid: A machaeridian from the Lower Ordovician of the Northwest Highlands". Scottish Journal of Geology. 43 (2): 97. Bibcode:2007ScJG...43...97H. doi:10.1144/sjg43020097. S2CID128899353.
Hogstrom, Anette E. S.; Taylor, Wendy L. (2001). "The Machaeridian Lepidocoleus Sarlei Clarke, 1896, from the Rochester Shale (Silurian) of New York State". Palaeontology. 44 (1): 113–130. Bibcode:2001Palgy..44..113H. doi:10.1111/1475-4983.00172.
Herringshaw, L. G.; Raine, R. J. (2007). "The earliest turrilepadid: A machaeridian from the Lower Ordovician of the Northwest Highlands". Scottish Journal of Geology. 43 (2): 97. Bibcode:2007ScJG...43...97H. doi:10.1144/sjg43020097. S2CID128899353.