Wikipedia article of the day for April 24, 2026

The Wikipedia article of the day for April 24, 2026 is Ornithoprion.
Ornithoprion is an extinct genus of cartilaginous fish. Its only species lived during the Moscovian age. Its fossils are preserved in black shales from the Midwestern United States. Ornithoprion's genus name, which is Greek for 'bird saw', was inspired by its bird-like skull and the saw-like appearance of the teeth in the lower jaw. The specific name honors the German zoologist Oscar Hertwig. Ornithoprion had a unique projection of its lower jaw termed the mandibular rostrum, which was covered by a beak of fused bony scales. It inhabited shallow, seasonal marine and brackish water environments. The rounded shape of Ornithoprion's teeth suggests that it hunted hard-shelled invertebrates, and bite marks and damage to some of its fossils indicate that it was fed on by other carnivores. Ornithoprion was small relative to other members of its order, with a cranium length of up to 10 cm (3.9 in) and an estimated body length of up to approximately 91 cm (36 in).