Jefferson HJ Kim 김현준 ⛏️🦴

Hello! My name is Jefferson Kim. I am a Paleontologist, Researcher, and Paleo-Nerd where I study everything and anything that pertains to Earth's prehistoric past! If you have an interest in paleontology, follow me on all the socials!

Tylosaurus rex I have chosen the color of Drymarch Couperi as the color scheme, and this artwork is not yet completed

Referred TEX Specimens 🦴 •MM-P3225 (fragmentary skull) •FHSM VP-2496 (fragmentary skull, jaws, and partial skeleton) •SMU 77932 (basicranium) •SMU 77933 (parabasisphenoid) •SMU 77672 (basioccipital)

The Bunker Mosasaur | KUVP 5033 🐍🦎 So recently, we got the exciting official reveal of the brand new Tylosaurus species, Tylosaurus rex! The new paper is led by Dr. Amelia R. Zietlow @TyrantLzrdQueen and provides a new interesting twist that I want to discuss for #FossilFriday

Confirmed TEX Specimens (So Far) 🐍 •PMNS 8029 - "Heath" [Holotype] •KUVP 5033 - "Bunker" •AMNH FARB 1543 •PMNS 1126 •PMNS 18410 •PMNS 2021-03-01 •PMNS 2021-03-11 •SMU 75374 •SMU 75586 •SMU 77679 •SMU 78000 •SMU 78001 •YPM VP 64607

Now how do we know that "Bunker" is TEX? Well amazingly, "Bunker" has TEX apomorphies, or derived traits that are unique to a particular taxonomic group / species. In fact, alongside "Bunker", over a dozen other specimens share similar apomorphic traits with the holotype! 🔬

BUNKER IS TEX! "Bunker" or KUVP 5033 is a remarkable specimen, being THE largest and one of the most complete Tylosaurus fossils ever discovered! The entire skeleton measures at about 14 meters long (~46 ft) with the skull itself measuring at nearly 2 meters long (6 ft)!

@pathoftitans Try This Link for Paper (other one is broken ;-;) digitallibrary.amnh.org/items/dbbf9dc2…

TEX Paper Link 📝 hdl.handle.net/2246/7549d

Introducing Tylosaurus rex! A BRAND new species of mosasaur that lived during the Campanian Stage of the Late Cretaceous Period (~80 MYA) in what is now Dallas, Texas! 🦎 TEX Research Team 2026 ⛏️ •Amelia R. Zietlow @TyrantLzrdQueen •Michael J. Polcyn •Ronald S. Tykoski

@TyrantLzrdQueen @Edaphosaurus @AlderonGames @pathoftitans @Paleo_Tykoski @PerotMuseum @SMU @AMNH @RGGSatAMNH TEX THE KING 👑 Congratulations Amelia!

Everything IS bigger in Texas... Introducing TYLOSAURUS REX–“TEX”. A monster animal, a monster paper, & a monster project that I am *so* excited to finally share with everyone after ~5 yrs. Huge thanks to my coauthors, Mike & Ron, & to Alderon Games for bringing our lad to life!!

Today is a very special day, as we celebrate the 227th birthday of arguably the greatest fossil hunter & paleontologist of all time, Mary Anning!! ⚒️🦴🎉 #maryanning

🚨NEW STUDY DROP🚨 New specimen of Hypacrosaurus altispinus is described. It's so well preserved, that it helps to re-write what defines the genus/species. It implies the second species H. stebingeri, may belong to the genus Corythosaurus. 🎨: Lucas Attwell

Dark wing feathers in birds likely provide structural support via melanosomes and improve flight efficiency through radiative heat, particularly in long-distance fliers. I've seen this concept applied to pterosaurs, but it's interesting to know the science behind it.

Specimen BMRP 2002.4.1, nicknamed "Jane" represents the second Nanotyrannus species, N. lethaeus, being described in October 2025 by Dr. James Napoli @JGN_Paleo & Dr. Lindsay Zanno @ExpeditionLive with the species name being a reference to River Lethe of Greek Mythology.

Hey ya’ll! 👋 I will be at the Field Museum @FieldMuseum on Saturday, June 13th for an all-day visit to the collections and the new Pokémon Fossil Exhibit. If anyone is in town that day or will be there, let me know! I would love to meet and connect :D

Piatnitzkysaurus

Credit to Jun-Hyeok Jang for the wonderful artwork!

Happy #PterosaurPtuesday! 🔥🐉🔥 This is the holotype specimen of Infernodrakon hastacollis, which consists of a single elongated neck vertebra [BMR P2002.2] which measures at around 35 centimeters long, or 14 inches. It likely had an estimated wingspan of ~4.15 meters (13.6 ft).