Theyβve only waited 120Ma.
A new glimpse into theropod diversity from Early Cretaceous Australia: megaraptorids, an unenlagiine, and for the first time, carcharodontosaurians.
Read it here: tandfonline.com/doi/full/10....
Artwork by Jonathan Metzger.
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19.02.2025 19:51 β π 82 π 35 π¬ 2 π 1
Photographs of the skull and mandible of Cochimicetus convexus in dorsal view - like other baleen whales, the skull resembles a surfboard in shape. Unlike modern species, the blowhole is located very far anteriorly and there are very large temporal fossae.
Photographs of the skull and mandible of Cochimicetus convexus in ventral view - the palate is broadly exposed here and is long and flat.
Cladogram or evolutionary tree for the study, showing eomysticetid whales, including Cochimicetus, as a single clade. toothed baleen whales are positioned further down the tree, along with dolphins and an archaeocete.
π¬π¦ New paper by Cedillo-Avila et al. in Palaeo-Electronica: newly named eomysticetid baleen whale from the Oligocene of Baja California, Cochimicetus convexus! Elated to see another eomysticetid named from the Pacific coast. Read it here: palaeo-electronica.org/content/in-p...
06.01.2025 18:37 β π 16 π 4 π¬ 0 π 0
All cetaceans are classified as "even-toed ungulates" (Order: Artiodactyla), while horses are "odd-toed ungulates" (Order: Perissodactyla).
That means a giraffe is more closely related to a narwhal (58 MYA) than to a zebra (76 MYA).
(diagram by K. L. Mariott)
07.09.2023 01:35 β π 126 π 36 π¬ 6 π 2
https://doi.org/10.1111/mms.13067
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New paper by my colleagues and I on the reproductive anatomy of a leopard seal π¦
Leopard seal reproduction is mostly unknown. This note from a Monash Uni dissection discusses the importance of morphology in providing some clues.
Open access paper here:
doi.org/10.1111/mms....
04.09.2023 14:21 β π 4 π 2 π¬ 0 π 0
Fucaia goedertorum, a small toothed baleen whale from the Pacific northwest around 30-25 million years ago. Its mouth be agape and it be looking chuffed.
A humpback whale with its mouth open in the act of lunge feeding, with the throat expanding due to incoming water. Best animal, fight me.
A Victorian polar megaraptor walking towards the viewer. Reconstructed as a dark brown, large clawed meat eating dinosaur with beige stripes increasing in prominence from the torso to the tail and with speculative red head crests.
A porgerbear chimeara, a combination of: puffin, polar bear, tyrannosaur, beluga, and porg (those feathered, gremlin-looking jellybeans from the sequel trilogy)
Hello new social media hellscape! I'm Ruairidh, a palaeontology PhD candidate and palaeoartist (of sorts) at Monash University and Melbourne Museum studying toothed baleen whales. I like DS9 and making weird animals out of other animals. Please share all the cool science and art with me! πππ¦
04.09.2023 12:31 β π 12 π 1 π¬ 0 π 0