Genus: Bicharracosaurus REUTTER, CARBALLIDO, WNDHOLZ, POL & RAUHUT, 2026
Etymology: Spanish, bicharraco, "big animal, and used by Dionide Mesa to refer to big size of the fossil and Greek, saurus(sauros), "lizard."

Species: dionidei REUTTER, CARBALLIDO, WNDHOLZ, POL & RAUHUT, 2026
Etymology: In honor of Dionide Mesa, who found this specimen and other dnosarus bones on his farm.

Holotype: MPEF-PV 1730

Locality: Dionide 3 locality, approximately 24 km north of Cerro Condor adn east of the Chubut River, Chubut Province, Patagonia, Argentina.

Horizon: Higher parts of the Canadon Calcareo Formation.

Biostratigraphy:

Age: Oxfordian-Kimmeridgian Stage, Malm Epoch, Late Jurassic.

Material:

Breakdown as follows:

MPEF-PV 1730/1-7: & middle to posterior cervical vertebrae.

MPEF-PV 1730/7-12: Compte dorsal column composed of 10 vertebrae.

MPEF-PV 1730/13: Sacrum composed of 5 articualded vertebralc enttra with parts of the sacricostal yoke and fused to the preacetabular porcess of the right ilium.

MPEF-PV 1730/14-22: 9 disarticulated caudal vertbrae.

MPEF-PV 1730/23-26: 4 disarticulated adn fragmentary cervical ribs.

MPEF-PV 1730/29-38: 10 disarticualted dorsal ribs.

MPEF-PV 1730/29, 35: Histological thin-section of 2 dorsal ribs.

MPEF-PV 1730.28: Fragmentary chevron.

MPEF-PV unnumbered: Several undiagnostic sacra and ribs.

Referred material:

MPEF-PV 1724: Posterior doral vertebral centra.