Genus: Jonoichthys GOUIRIC-CAVALLI, 2015
Etymology: Native Tehuelche voice, jono, "sea" and Greek, ichthys, “fish.”

Species: challwa GOUIRIC-CAVALLI, 2015
Etymology: Native Mapuche voice, challwa, "fish."
= Belonostomus nova sp A GOUIRIC-CAVALLI, 2013

Holotype: MOZ-PV 1747

Locality: Proximities of Cerro lotena, eastern part of Barda Negra Plateau, 70 km to teh southest of Zapal City, Neuquen Province, Argentina.

Horizon: Yaca Muerta Formation.

Biostratigraphy:

Age: Late Early to early Middle Tithonian Stage, Late Jurassic.
 
Material: Incomplete, robust, highly compressed, and three0dimensionally preserved specimen.