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n. pl. au·tap·o·mor·phies
An evolved character or trait that is unique to a single species or group within a larger phylogenetic group. Speech is an autapomorphy of humans among primates.

au·tap′o·mor′phic adj.
References in periodicals archive ?
The presence of white hairs throughout the ventral area of femora I and II could be an intersexual shared autapomorphy (see Edwards 2014), it is supported by geographic and phenological evidence.
This feature is also described as an autapomorphy of Duriatitan humerocristatus found in the British Upper Jurassic sediments of the Clay Formation, early Kimmeridgian in age (NHMUK 44635, Barrett et al.
These structures may be an autapomorphy of the genus, though additional anatomical and embryological studies, including other species, are needed to confirm this hypothesis.
Appendices of the midgut are an autapomorphy for Phasmatodea, but Timema have fewer and larger appendices relative to body size.
In fact, the genus lacks an autapomorphy of Plutellidae proposed by Kyrki (1984).
Neofundulus is distinguished from the remaining genera of Rivulidae family by having the following synapomorphies: fourth pectoral radial not expanded ventrally, a subasal longitudinal white-yellowish stripe on the anal fin in males, transverse black bars on caudal fin of females, and black spots on pectoral fin of males (Costa 19986) Neofundulus splendidus presents very narrow yellow lines on the pectoral fins, instead of black spots present on the other Neofundulus species, thus an autapomorphy of this species.
The placenta (modified gametophyte-sporophyte junction) is an autapomorphy of land plants (Graham, 1996; Graham et al.
In 1985, Chace used this clear species autapomorphy (presence of hepatic spine) to define a monotypic genus (Kemphyra) and accommodate this species.
Crotaphytus grismeri is not represented here, as this species has the unique condition of a predominantly closed Meckel's groove (an autapomorphy of the species; McGuire, 1996), which was not seen in any dentary from Fowlkes Cave.
satan, the mid-portion of the maxilla shows a dorsoventrally reduced and narrower alveolar margin, which is almost covered by exostotic ornamentation, a condition that is here considered as a probable autapomorphy of this taxon.
loftini may be parsimoniously considered an autapomorphy.