Agnostus
![](/Images/godic/202412/20/Agnostus_pisiformis_Kinnekulle_1_CRF1215.jpg")
![A drawing of Agnostus pisiformis, enrolled, frontal view, showing the cephalon (top), pygidium (bottom) with posterior spines hypostome with first segment of the antennae (cut off) and the frontal thoracal limb endopod, podomeres 7, 6, 5, and 4. Based on a SEM photo.,[3] original photo](/Images/godic/202412/20/Agnostus_pisiformis_frontal_thorax_limbs_linedrawing1215.jpg")
![Drawing of a biramous leg of Agnostus pisiformis](/Images/godic/202412/20/Agnostus_leg1215.jpg")
Agnostus is a genus of agnostid trilobites that lived during the upper Middle Cambrian–lower Upper Cambrian (approximately 506 to 492 million years ago). It is the type genus of the family Agnostidae. It is subdivided into two subgenera, Agnostus and Homagnostus.