Genus: Thoraxion SHARPE, STREET-SAMPSON, KONISHI & CALDWELL, 2026
Etymology: Greek, thorax, "ribcage".

Species: tahlequahae SHARPE, STREET-SAMPSON, KONISHI & CALDWELL, 2026
Etymology: In honor of Tahlequah, known also as J35, an endangered southern resident orca. Tahleqah came to international attention when twice, in 2018 and 2025, she lost a calf and carried its body for several weeks in a period of morning (Mapes, 2026). Tahlequah is a living reminder of the complete emotional behaviors displayed by non human animals, adn her vigils for her daughters are here immoratalized in the zoologicla nomenclature.

Holotype: IRSNB R 373

Locality: Mons Basin, Belgium.

Horizon: Ciply-Malogne Phospatic Chalk Formation.

Biostratigraphy:

Age: Upper Maastrichtian Stage, Late Senonian Subepoch, Gulf Epoch, Late Cretceous.

Material: Skull, dentary, several cervical, most of the thoracic and abdominal axial skeleton, several caudal vertebrae, the left pectoral girdle and a partial forelimb..