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The Digital Morphology library is a dynamic archive of information on digital morphology and high-resolution X-ray computed tomography of biological specimens. Browse through the site and see spectacular imagery and animations and details on the morphology of many representatives of the Earth's biota. Recent additions or updates to the site include:

<i>Crocodylus rhombifer</i>,<BR> Cuban Crocodile
The Cuban crocodile is found today only in Cuba and Isla de la Juventud. However, it previously occurred in The Bahamas and Cayman Islands, as revealed by fossils recovered from underwater caves (blue holes) in the former and organic peat deposits in the latter. Evidence from radiocarbon dates, fossil and archaeological sites, and historical records confirms that Crocodylus rhombifer went extinct on these islands within the past 500 years, possibly as a result of overhunting. Learn more about the Cuban crocodile in this DigiMorph account contributed by Nancy Albury and David Steadman.  [more...] 
Horned Puffin, Fratercula corniculata2015-10-29 12:00:00
Horned Puffin, <i>Fratercula corniculata</i>
The horned puffin is a member of Pan-Alcidae, a clade that includes auks, auklets, puffins, guillemots, murres, and murrelets. One of three living puffin species in the Pacific Ocean basin, Fratercula corniculata spends most of its life at sea. Horned puffins usually come ashore only to breed, and are monogamous. Learn more about this species, and view its cranial endocast, by reading this new DigiMorph account by Dr. N. Adam Smith.  [more...] 
The Origin of Turtles2015-09-23 12:00:00
The Origin of Turtles
The point of origin of turtles within amniotes has long been a source of contention. Bever and coauthors, in a recent issue of Nature, examine via high-resolution X-ray CT the enigmatic taxon Eunotosaurus africanus, a 260-million-year-old fossil reptile from the Karoo Basin of South Africa. Their analysis suggests a 40-million-year extension to the turtle stem and moves the ecological context of turtle origins back onto land. Learn more by reading this new DigiMorph account.  [more...] 
That's Just How They (En)Roll2015-08-04 12:00:00
Throughout trilobite evolution, various clades independently converged upon morphologies that permitted enrollment of their exoskeletons so as to efficiently encase their soft tissues within a hard protective carapace. Derived trilobites, like the Flexicalymene shown here, had differentially-thickened cuticles and a number of coaptative devices, morphological structures that guided the articulation between segments and locked the exoskeleton in an enrolled posture. Learn more about this defensive mechanism by reading this new DigiMorph account.  [more...] 
The Alligator Gar, Atractosteus spatula2015-07-14 12:00:00
The Alligator Gar, <i>Atractosteus spatula</i>
The alligator gar is one of the largest freshwater fish species in North America. Once abundant throughout the Mississippi River basin and Gulf of Mexico tributaries, it is now considered vulnerable to extinction due to commercial harvest and early attempts to eradicate it as a 'trash fish' in favor of sport fish populations. Learn more about Atractosteus spatula by reading this new DigiMorph account by Jim Long.  [more...] 
It's a Bird!!2015-06-18 12:00:00
Balanoff and coauthors described this egg as that of a neoceratopsian dinosaur in 2008. However, further examination of the high-resolution X-ray CT data resulted in reidentification of the specimen as that of an enantiornithine bird. In their new PLoS ONE paper, Varricchio and coauthors state that the embryo exhibits avian apomorphies including a strut-like coracoid and an ulna longer than its humerus. Learn more about this egg unscrambling here.  [more...] 
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