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| genus_authority = Howell & Resser in Cooper & Kindle, 1936
* ''S. gaspensis gaspensis'' <small>Howell & Resser in Cooper & Kindle, 1936</small>
4 KB (574 words) - 01:03, 17 May 2026
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...which was originally described as a species of ''[[Agnostus]]'' by Salter in 1864.<ref>[http://www.trilobites.info/generic_names_Jell%26Adrain2003.pdf A
...unwaptan, Furongian) agnostoid arthropod ''lotagnostus'' Whitehouse, 1936, in Laurentian and Avalonian North America: systematics and biostratigraphic si
9 KB (1,244 words) - 01:03, 17 May 2026
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...name='Treatise'>Whittington, H. B. et al. Part O, Treatise on Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order R
...ed by the [[Cephalon (arthropod head)#Trilobite cephalon|glabella]], which in most species extends into a forward pointing thorn at its frontal tip. The
5 KB (685 words) - 01:03, 17 May 2026
