an apomorphy (or derived trait) is a novel character or character state that has evolved from its ancestral form (or plesiomorphy). A synapomorphy is...

symplesiomorphy, apomorphy, and synapomorphy, all mean a trait shared between species because they share an ancestral species. Apomorphic and synapomorphic...

adaptive (e.g., as in non-vascular ("lower") and vascular ("higher") plants). The terms "plesiomorphy" and "apomorphy" are typically used in the technical literature:...

system, but similar constructions exist in other groups. Another possible apomorphy is found in the ultrastructure of the sperm, which has a dense heel on...

descendants. Apomorphy – a derived trait. Apomorphy shared by two or more taxa and inherited from a common ancestor is synapomorphy. Apomorphy unique to...

list of Greek and Latin roots, stems, and prefixes commonly used in the English language from H to O. See also the lists from A to G and from P to Z. Some...

typically shared derived characteristics (synapomorphies) that are not present in more distant groups and ancestors. However, from an empirical perspective...

Phytomelan is not unique to Asparagales (i.e. it is not a synapomorphy) but it is common within the order and rare outside it. The inner portion of the seed coat...

(2024). "A re-evaluation of Scelidosaurus remains from Ireland and the importance of apomorphy-based identifications". Proceedings of the Geologists' Association...

other clades; shared apomorphies are used to construct and define clades. The term is relative; a trait considered an apomorphy in one clade may not be...

microtubule-supported pseudopods. In the absence of an apomorphy, the group is ill-defined, and its composition has been very fluid. Some Rhizaria possess...

characteristics of the hand and wrist alone (an apomorphy-based definition), and included the long, thin fingers, bowed, wing-like forearm bones, and half-moon shaped...

the red squirrel. An apomorphy-based definition could read: "the first ancestor of A to possess trait M that is inherited by A, and all descendants of that...

Phylogenetic signal is an evolutionary and ecological term, that describes the tendency or the pattern of related biological species to resemble each...

synonymous with Maniraptoriformes. In 2002, Gregory S. Paul named an apomorphy-based clade Avepectora, defined to include all theropods with a bird-like...

specialized coelurosaurian theropods, and are today represented by about 11,000 living species. Various synapomorphies for Theropoda have been proposed based...

phenetic algorithms, such as UPGMA and Neighbor-Joining, group by overall similarity, and treat both synapomorphies and symplesiomorphies as evidence of...

referred to the two groups as Crocodylotarsi and Ornithosuchia. Crocodylotarsi was defined as an apomorphy-based taxon based on the presence of a "crocodile-normal"...

described by Stephenson in 1935, nematosomes are the defining apomorphy (synapomorphy) of the genus Nematostella but have received relatively little...

this glands was a synapomorphy of Dugesia and Neppia. The absence of these glands in some Neppia species (N. jeanneli, N. montana and N. schubarti) is...

linguistics. Paraphyletic groups are identified by a combination of synapomorphies and symplesiomorphies. If many subgroups are missing from the named group...

taxonomic stability of the group. Douglas E. Soltis and others identify thirteen synapomorphies (shared characteristics that unite monophyletic groups...

shared, derived characters (synapomorphies); evolutionary taxonomy tries to take into account both the branching pattern and "degree of difference" to find...

circumscriptions had little in the way of apomorphies, but the entire group had numerous synapomorphies and were easy to recognise. This resulted in an...

"Phylogeny and Apomorphies of Temnospondyls". Tree of Life Web Project. Retrieved 18 July 2011. Gardiner, B.G. (1983). "Gnathostome vertebrae and the classification...

Liddell and Scott μέγας in Liddell and Scott μεῖον in Liddell and Scott μέλας in Liddell and Scott μέλισσα in Liddell and Scott μῆνιγξ in Liddell and Scott...

that of some Neogoveids, and a short, thornlike, triangular adenostyle. Ogoveidae also possesses several unique apomorphies, including a conspicuous,...

the Eurypteroidea and the Mixopteroidea (now considered a synonym of Carcinosomatoidea), as well as having a large number of apomorphies (characteristics...

birds than to Deinonychus. Avialae is also occasionally defined as an apomorphy-based clade (that is, one based on physical characteristics). Jacques...

in 2009. Despite the molecular evidences, there are no morphological apomorphies supporting this clade. Phylogenetic supertree after Sluys et al., 2009:...