@CWRU #paleontologist, passionate about #mammaldiversity, specialist in ancient South America. I blog at https://nitter.cf/t.co/vo9xP6qZxN #SciComm #HornedArmadillos
Cleveland, OH
Joined July 2011
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Interested in #palaeoecology & reconstructing ancient terrestrial ecosystems? Our Methods in Paleoecology edited volume is now available: springer.com/us/book/9783319… @springerpub @caestromberg @DrTeethAl @paleololigo @MelissaBerke @pdavidpolly @Jussi_T_Eronen @wabarree @cwru @goCMNH
We'd love to receive some applications from paleontologists, so please consider applying if you qualify!
🚨Job Alert!🚨 @CWRUSOM is looking for a neuroanatomist to join the Dept. of Anatomy! Application details here apply.interfolio.com/151831 Contact @dcpaleo with questions!
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#FossilFriday 🇦🇷Partial lower jaw of the last horned #armadillo (~9-8 million years old): Epipeltephilus kanti from the #Miocene of San Juan, #Argentina. For more info and a discussion of the decline of this group, check out our recently published paper: doi.org/10.1002/spp2.1514
#MammalMonday 🐿️🦇🦙🐒 Interested in estimating body mass for extinct groups of #mammals or #paleobiology? Check out our recently published J. of Mammalian Evolution article, which also includes new BM estimates for lots of #notoungulates: rdcu.be/dg3z3
#MammalMonday 🐿️🦇🦙🐒#Deer can have big #antlers or big #tusks but not big antlers AND big tusks. 🦌Check out this article by @CSULBMammalLab from the March J. of Mammalian Evolution, which explores why this might be (using muntjaks and kin). rdcu.be/c96Ez
#FossilFriday 🇦🇷 Beautiful articulated armor of the late #Miocene (~ 7 million yrs. old) #armadillo Macrochorobates from northwest #Argentina. About seven movable bands are visible toward the front (left), followed by a solid portion at the back (right). From @FieldMuseum
#MammalMonday 🦷A new histological study of #marsupial #tooth #development highlights differences between woolly opossums and other didelphids. Check out this article in the March issue of the J. of Mammalian Evolution. rdcu.be/c8vuu
#FossilFriday ☘️🇮🇪☘️For St. Patrick's Day, the "green ghost" from #Chile: 🇨🇱Chlorocyon phantasma, a ~35 million-year-old meat-eating #marsupial, mostly preserved as natural molds of the lower jaw (in 🌋volcaniclastic rock). #OpenAccess details here: digitallibrary.amnh.org/hand…
#MammalMonday 🇨🇳🦷🥔🥔🥔Magnificent #multituberculate material from #China tops the TOC lineup for the March issue of the J. of Mammalian Evolution. Read about the new species, Erythobataar ganensis, and its implications for #tooth homologies here: rdcu.be/c7uZf
#MammalMonday 🐎🦴🇨🇦How good is a metapodial #bone for identifying a #Pleistocene #horse? Not very ☹️ (at least in E Beringia) - according to this article by @palaeozoe et al. (incl. @palaeoeco) from the Dec. J. of Mammalian Evolution. Read it here: rdcu.be/c60S1
#FossilFriday 🇨🇱 Picturesque skull of the ~15 million-year-old #toxodont #notoungulate Palyeidodon obtusum from southern #Chile. It is the geologically oldest member of its family with ever-growing #molars. 🦷(No scale, but it is a cow-sized skull.) Collections of @MNHNcl
#MammalMonday 🐀🏝️🦷Incisor #enamel microstructure vs. ancient #DNA; which is correct regarding the evolutionary relationships of the extinct West Indian #rodent Elasmodontomys? Check out this recent J. of Mammalian Evolution article for details: rdcu.be/c6tNx #teeth
#MammalMonday 🇺🇾🇦🇷Check out this pair of #Pleistocene #armadillo paleoclimate papers from the December issue of the J. of Mammalian Evolution (starring Chaetophractus and Tolypeutes). rdcu.be/c5wwU rdcu.be/c5ww9
#FossilFriday 🇦🇷💀Partial skull of the tiny (~1 lb./ 500 g) #notoungulate Tremacyllus from the #Pliocene of northwest #Argentina. You would be forgiven if you thought it was from a 🐿️ or 🐇 at first glance!
Thanks to @mcgratherium for bringing this to fruition! 🦷🐀🐁🇨🇱
Caviomorphs from Pampa Castillo, Chile: new octodontoid records & biochronological implications onlinelibrary.wiley.com/doi/… @dcpaleo @datadryad @wileyearthspace
ALT Top left: map of the lower part of South America showing fossil rodent localities; Pampa Castillo at centre left (white dot). Top right: dark coloured Acarechimys minutus mandible (scale bar 2 mm). The bottom half of the figure features specimens of two new rodent taxa from the Pampa Castillo fauna: above, is a cast of the type specimen of Dudumus berggreni (SGOPV 2140), left M1 and M2 in occlusal view on the left and anterior view on the right. Below is a cast of the type specimen of Caviocricetus guenekko (SGOPV 2194), right DP4 and M1 in the same orientations. The two views of each specimen are separated by an explanatory line diagram. Scale bar for both specimens is 2 mm.
Darin Croft retweeted
The next paper from my PhD is out now!
Palorchestid arms are robust and weirdly proportioned relative to their legs. Maybe limb shapes in living species can help us understand what these extinct marsupials were up to?
Journal of Mammalian Evolution: rdcu.be/c2bAF 1/x
ALT Grey humerus and femur bones laid out next to a skeletal reconstruction of Palorchestes azael.
#MammalMonday 🦷🐒🏔️If you are interested in how tooth shape varies with diet in mammals, check out this improved approach for measuring tooth topography using DNE and the R-package molaR - from the Dec. issue of the J. of Mammalian Evolution. #teeth rdcu.be/c40Hb
#FossilFriday 🇨🇱🦷PLUS... the example extends to several groups of #marsupials, as can be seen in this ~17 million-year-old lower jaw of an abderitid from #Chile (which are distant relatives of modern shrew-opossums). But in this group, it is the first molar that is blade-like.
Plagiaulacoid dentition, my favorite example of convergent #evolution. Left, Carpolestes, a #primate relative. Right, Mesodma, a #multituberculate. Both groups evolved blade-like premolars, procumbent incisors, and bunodont molars #FossilFriday @yalepeabody
ALT Lower right jaw of the plesiadapiform primate Carpolestes
ALT Lower left jaw of the multituberculate Mesodma (genotype specimen)
#FossilFriday 🇺🇾🦴An #armadillo #skull in the hand... is worth many in the ground! This one from #Uruguay belongs to Doellotatus, a #Pliocene relative of modern hairy armadillos and kin. These armadillos have relatively large teeth (for an armadillo!) and tend to be omnivorous.
#MammalMonday 🌵🐀🐀🐀Spiny rats! Check out this pair of papers on skull and postcranial morphometrics in this diverse group of caviomorph #rodents. Both are the December issue of the J. of Mammalian Evolution. rdcu.be/c30AX rdcu.be/c30BL
#FossilFriday 🇦🇷🥩🦷Well-preserved lower jaw of the 18 million-yr-old meat-eating #marsupial Borhyaena tuberata. The dark brown color is typical of #fossils from the prolific site of Santa Cruz (Patagonia). Check out the 4 pairs of slicing #teeth (carnassials) in back. #Miocene
