Agnostidae

Agnostidae is a family of Agnostida trilobites. Like all Agnostina, they were eyeless and bore only two thoracic segments. They ranged in benthic waters across the globe from 508 to 461 million years ago, containing the following genera, among others:


 * Acmarhachis
 * Agnostus
 * Aistagnostus
 * Anglagnostus
 * Biciragnostus
 * Connagnostus
 * Distagnostus
 * Eolotagnostus
 * Gymnagnostus
 * Homagnostus
 * Idolagnostus
 * Innitagnostus
 * Ivshinagnostus
 * Kymagnostus
 * Lotagnostus
 * Micragnostus
 * Obelagnostus
 * Oncagnostus
 * Peronopsis
 * Phalacroma
 * Phalagnostus
 * Quadrahomagnostus
 * Raragnostus
 * Semagnostus
 * Strictagnostus
 * Trilobagnostus