Osteocallis leonardii Collareta, Merella, Casti, Di Cenio, Tinelli et Bianucci, 2023

Diagnosis: Shallow trail of essentially straight or slightly arcuate furrows bored into external (cortical) bone surfaces. Furrows are organized in pairs side-by-side such that completely preserved trails appear as two parallel adjoining rows of closely parallel furrows. Groups of 2–3 appressed furrows are often observed along each row. Osteocallis leonardii isp. nov. may be comprised of a single trail or a network of randomly overlapping trails.