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Autapomorphy is described in multiple online sources, as addition to our editors' articles, see section below for printable documents, Autapomorphy books and related discussion.

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Twerking: Birds Do It. Bees Do It.
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Sauropterygians NEVER FORGET
In fact, absence of the tabular may be a neodiapsid autapomorphy (though the 'younginiform' Claudiosaurus may perhaps have tabulars). Tabulars are paired bones at the back of the skull, located above the occipital surface and on either side of the also ...
First detailed postcranial anatomy supporting Jeholosaurus as a basal ornithopod
Paleontologists compared Jeholosaurus with material of other primitive cerapodans, and found it can be diagnosed on the basis of one postcranial autapomorphy, relating to the absence of parapophyses from the anterior dorsal vertebrae, and a unique ...
Embryological evidence for developmental lability during early angiosperm
The issue of whether the eight-celled, nine-nucleate female gametophyte of Amborella represents an autapomorphy of the Amborella clade or is a plesiomorphic characteristic for all angiosperms cannot be resolved at this time.
PLoS One & Syst Entomol:昆虫形态学三维重建方法的建立于应用

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