Why is every synapomorphy a Symplesiomorphy? A synapomorphy is a type of character shared by two or more taxa. Also, this character is present in their recent common ancestor. ... Therefore, this character is an ancestral character. Hence, the main difference between synapomorphy and sym...
The osphradium, a chemosensory organ on or near the gills, is a putative potential synapomorphy of Mollusca. Although the osphradium regularly appears on illustrations of hypothetical unifying molluscan bauplans, the homology of these putative sensory structures has been debated in most classes. ...
or even to hope for empathy, but to simply state this how it has been for me so far (SPOILER: it’s a story of failure), if one is headed down this path it might help, or at least the tale might be of interest in some other way, ...
How is heredity related to evolution? How does the near universality of the genetic code provide evidence of the common ancestry of all life? Jaws are what type of trait in the gnathostomes? Synapomorphy, homologous, analogous, derived, or ancestral? Some genes are said to be linke...
arguing that an intron loss is an improbable event. Based on a different approach, Hayward et al (2005) [76] used the structure of the USP/RXR hormone receptors, which showed a strong acceleration of evolutionary rate in Diptera and Lepidoptera, to reject the Halteria clade and to provide ...
tarsometatarsi, on which all species butP. robustusare based, are quite stereotyped in general structure and leave little doubt that the forms placed here by Ameghino do all belong to a natural group.” A ratio of length to proximal width of >2 is typical of most penguins. Synapomorphy ...
arguing that an intron loss is an improbable event. Based on a different approach, Hayward et al (2005) [76] used the structure of the USP/RXR hormone receptors, which showed a strong acceleration of evolutionary rate in Diptera and Lepidoptera, to reject the Halteria clade and to provide ...
The presence of 2-segmented labial palps is a synapomorphy for the Notorhopalotria-Rhopalotria clade. (2) Mean male rostral length/pronotal length (RL/PL): (0) <1.0; (1) >1.0, and <1.30; (2) >1.30. High male RL/PL are characteristic of Parallocorynus subgenus Eocorynus and ...