3+ hour ago  (57+ words) Home " Paleontology " Acronichthys By Jason R. Abdale on July 5, 2026 " ( 0 ) Acronichthys was a tiny fish measuring just 4 cm (1. 6 inches) long which lived in freshwater environments within western North America during the late Cretaceous Period 90-66 million years ago. Acronichthys maccognoi. " Jason R. Abdale (July…...

1+ mon, 4+ week ago  (101+ words) Home " Paleontology " Cladoselache By Jason R. Abdale on May 5, 2026 " ( 0 ) Cladoselache was a 6 foot long primitive proto-shark which lived during the late Devonian Period 370-360 million years ago. Several publications from the 20th Century state that Cladoselache was the oldest-known shark. However, studies from…...

3+ mon, 2+ week ago  (144+ words) Home " Paleontology " Eternauta By Jason R. Abdale on March 18, 2026 " ( 0 ) Eternauta patagonica was an ichthyosaur which lived around Argentina during the late Jurassic Period 152-145 million years ago. Eternauta was identified as a member of the ichthyosaur family Ophthalmosauridae, and more specifically the…...

2+ mon, 5+ day ago  (115+ words) Home " Paleontology " Stethacanthus By Jason R. Abdale on April 29, 2026 " ( 0 ) Stethacanthus was a primitive proto-shark which swam the seas from the late Devonian Period to the end of the Carboniferous Period approximately 380-300 million years ago. Fossils of various species of this genus…...

2+ mon, 3+ week ago  (260+ words) Home " Paleontology " Sulcusuchus By Jason R. Abdale on April 9, 2026 " ( 0 ) Sulcusuchus was a small polycotylid plesiosaur which lived off the coast of Argentina during the late Cretaceous Period around 70 million years ago. In 2025, it was reported that another specimen of Sulcusuchus (collection…...

3+ mon, 1+ week ago  (92+ words) Home " Paleontology " Megalneusaurus By Jason R. Abdale on March 26, 2026 " ( 0 ) Regrettably, the vertebrae, ribs, and pelvic girdle appear to have been lost (Wahl et al. 2007, page 98; Wahl et al. 2010, page 170). Front and rear flippers of Peloneustes philarchus. Andrews, Charles William. A Descriptive…...

10+ mon, 1+ week ago  (574+ words) By Jason R. Abdale on August 22, 2025 " ( 0 ) Marshosaurus bicentesimus holotype (originally UUVP 2826, now UMNH VP 6373). Left ilium in lateral (A) and medial (B) views. Abbreviations: act- =" acetabulum; anb- = anterior blade; isc- = ischiadic peduncle; meb- = medial blade; pob- = posterior blade; pu- = pubic peduncle. Madsen 1976, page…...