synapomorphy


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Related to synapomorphy: Symplesiomorphy

synapomorphy

(si-nap'ō-mōr-fē),
Species-specific unique embryologic features.
[syn- + apo- + morph- + -y]

synapomorphy

(sĭ-năp′ə-môr′fē)
n. pl. synapomor·phies
An evolved character or trait that is shared by two or more taxonomic groups and is considered to have originated in their common ancestor. Hair is synapomorphic for marsupials, primates, and all other taxa that are grouped together in the class Mammalia.

syn·ap′o·mor′phic adj.

synapomorphy

the sharing of derived characters by different species.
References in periodicals archive ?
(1995), for example, identified the presence of switchbacks as a synapomorphy of higher araneoids, but did not attempt to make further specific homology statements.
The Cacteae dade is supported (b86/j83% and b70/ j67%) by various structural features, but only one of them, the occurrence of a disjunct hilum and micropyle in their seeds (63), is a synapomorphy. The uniqueness of this feature was pointed out by Barthlott and Voit (1979) and is considered one of the key characters that defines the tribe (Anderson, 2001).
Early inversion of anthers in the bud is the morphological synapomorphy (unique) for the large dade that includes Ericoideae, Styphelioideae, and Vaccinioideae (in contrast to the late anther inversion present in Arbutoideae and Monotropoideae).
The accelerated transformation alternative (ACCTRAN) optimizes the CBP denticles (character 61) as a synapomorphy for Leucauge + (Sancus + tetragnathines) (Fig.
This appears to be a cycad synapomorphy (Stevenson, 1990b), and thus any fossil with such perforations can be considered a cycad.
The synapomorphy these three taxa have is a bract-scale complex in which the bract is large and contains many vascular strands and the scale is relatively small.
Ehrhartoideae is sister of the clade that consists of Brachyelytrum, Pooideae, and the PACC clade, and the change from three to two lodicules is a synapomorphy of this set of four lineages [ILLUSTRATION FOR FIGURE 5 OMITTED].
The sister-group constellation Notasteron-Storosa is based on the sternum with posterior boss taken as a synapomorphy (5/1).
This character is very common among Ischnocolinae although it does not represent a synapomorphy for this group.
The embryo of tribe Trilepideae is well characterised by a prominent invagination over the coleoptile, which represents a synapomorphy for the tribe.
(1991), where taxons considered were related based on shared derivative characters (synapomorphy).