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taxon presents an autapomorphy with respect to its absence of legs. The autapomorphic species concept is one of many methods that scientists might use to...

gomphotheres", the latter of which are otherwise placed in Gomphotheriidae. An autapomorphic feature of the group is the presence of a checkerboard pattern formed...

premaxillary teeth. It shows "type III" retroarticular process and autapomorphic (unique) traits of the cervical vertebrae, which had a smooth ventral...

distinguishable from other troodontids thanks to the following diagnostic (autapomorphic) traits residing in the pelvis: the pubis is retroverted forming a 17°...

their New World counterparts. Researchers concluded this is a single autapomorphic character from a single deletion event in the past. This most reasonably...

presence of four barbels, long dorsal and anal fins, and especially by the autapomorphic presence of a suprabranchial organ, formed by tree-like structures from...

that such remnants of past evolution can possess striking and unique autapomorphic adaptations. The genus contains two species: The oxpeckers are endemic...

to say whether this character distribution implies that Tiktaalik is autapomorphic, that Panderichthys and tetrapods are convergent, or that Panderichthys...

cranial bones and equal participation of the three structural bone layers autapomorphic traits of Homo erectus?". Bulletins et mémoires de la Société d'Anthropologie...

extant species to be misleading. Metallyticidae species have several autapomorphic traits, including their metallic coloration and the enlarged spine on...

regarded as living fossils. See for example the uniquely and highly autapomorphic oxpeckers, which appear to be the only survivors of an ancient lineage...

vertebrae. Siats is characterized by seven diagnostic, including four autapomorphic (i.e. unique), traits. Its autapomorphies include the subtriangular...

tubercles on the maxilla and on the premaxilla. Caryonosuchus also has autapomorphic rough ornamentation with grooves and bony ridges on its rostrum. †Chenanisuchus...

Gazella. This was attributed to a history of rapid evolution of an autapomorphic phenotype of Antilope. This might have been aided by a particularly...

unique in the musculature of their forearm and hand. Yet, they remain autapomorphic, meaning each muscle is found in one or more non-human primates. The...

the clade. C. nicobarica is a quite singular columbiform (though less autapomorphic than the flightless Raphinae), as are for example the tooth-billed pigeon...

interosseous muscle (PPIM) is absent in non-human primates, and is probably an autapomorphic muscle unique to the human thumb (together with flexor pollicis longus)...

found the specimen to not be diagnostic because it does not have any autapomorphic features or a unique combination of characteristics. Therefore, they...

colleagues differentiated Oxalaia from it and other spinosaurids by its autapomorphic (distinguishing) craniodental features, like its sculptured palatal...

genus. Other traits of M. splendidus and other Metallyticus species are autapomorphic, including the metallic coloration and large outer spine on the front...