Gymnagnostus congros Robison and Pantoja-Alor 1968 (artiopod)

Artiopoda - Agnostida - Agnostidae

Full reference: R. A. Robison and J. Pantoja-Alor. 1968. Tremadocian trilobites from the Nochixtlan Region, Oaxaca, Mexico. Journal of Paleontology 42(3):767-800

Belongs to Gymnagnostus according to R. A. Robison and J. Pantoja-Alor 1968

Sister taxa: Gymnagnostus kobayashii, Gymnagnostus mexicanus, Gymnagnostus perinflatus

Type specimen: USNM 158892, a pygidium. Its type locality is USNM 16002b, Tinu Formation, Oaxaca, Mexico - Robison and Pantoja-Alor 1968, which is in the Tremadoc of limestone/shale the Tinu Formation Mexico.

Ecology: slow-moving epifaunal detritivore

Distribution: found only at USNM 16002b, Tinu Formation, Oaxaca, Mexico - Robison and Pantoja-Alor 1968

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