Robert Boessenecker, Doctor of Whaleontology™️さんのイラストまとめ

Since the article is out, here's the graphite base drawing prior to colorizing in photoshop. Life restoration of Olympicetus-the dolphin that could not echolocate. As such, I reconstructed this baby dolphin without a melon (sound focusing organ). #sciart 6x8", 4 hours

NEW MONOGRAPH! Geology and Paleontology of the Mio-Pliocene Wilson Grove Fm at Bloomfield Quarry, No. CA - complete description of an entire invert+vert assemblage! This includes a fragmentary but diverse assemblage of walruses - 5 taxa! https://t.co/eri5XvOctO

First up for the #sciart tweetstorm - a pod of extinct long-snouted "river" dolphins (saltwater but likely freshwater tolerant) Parapontoporia and mancalline auk feeding on sardines and an unaware juvenile California sheepshead off CA coast 3 mya - graphite + digital, 10x14"

New paper! Giant shark O. megalodon went extinct 1 million years earlier than previously thought, based on revised data-extinct about 3.6 Mya, meaning that it was not killed off by a supernova and not part of marine vert extinction 2-2.5 Mya. Read here: https://t.co/81n0gZWvD3

#artadventcalendar day 4: during the last year of my Ph.D. in NZ I learned watercolor for stress relief and stopped doing thesis work on Sundays to achieve work-life balance. One of my first good landscapes: Moeraki Boulders in NZ. Watercolor, 12x8", 2014.

@AMNH An easy-enough distinction today - but many (if not most) extinct phocoenids had long snouts like modern bottlenose dolphins! Here's one such example, Piscolithax tedfordi from the upper Miocene of Baja California - @ucmpberkeley collections.

New pub! New fossils of the early diverging sea lion-like "imagotariine" walrus Neotherium mirum and other pinnipeds from the Sharktooth Hill Bonebed, Middle Miocene, California, by @VelezJuarbeJ - fossils from @ucmpberkeley and @NHMLA https://t.co/uQjfjNdQcx

New pub! Growth and development of pseudoteeth in the bony toothed birds (Pelagornithidae) appears to be governed by ancient dental genes #openaccess #OA https://t.co/Tbmf51PwqI

New pub! Redescription of the large shark-toothed dolphin Phoberodon arctirostris from the lower Miocene Gaiman Formation of Patagonia - by Mariana Viglino, @PatagonianWhale @emgfitzgerald et al. https://t.co/pOTGB5YGyq

New paper out! Coauthored with fellow pinnipedologists Annalisa Berta and Morgan Churchill - review of the fossil record, phylogeny, and evolution of pinnipeds (fur seals, sea lions, true seals, desmatophocids, and walruses)! Published in @annualreviews https://t.co/IRfhb88Rp9