00433nas a2200133   4500008004100000245006200041210006100103300001400164490000700178100002200185700002200207700002500229856004500254       2003                        eng d00aClassification of Convolvulaceae: a phylogenetic approach0 aClassification of Convolvulaceae a phylogenetic approach  a791–8060 v281 aStefanovic, Saša1 aAustin, Daniel, F1 aOlmstead, Richard, G  uhttps://ipomoeeae.myspecies.info/node/6802139nas a2200145   4500008004100000245014900041210006900190300001400259490000700273520160900280100001901889700002301908700001701931856004501948       2001                        eng d00aPhylogenetic analysis of Ipomoea, Argyreia, Stictocardia, and Turbina suggests a generalized model of morphological evolution in morning glories0 aPhylogenetic analysis of Ipomoea Argyreia Stictocardia and Turbi  a585–6020 v263 a<p>We tested the phylogenetic hypothesis that the circumscription of the genus Ipomoea comprises all members of Hallier&#39;s historical taxon, subfamily &ldquo;Echinoconiae&rdquo;, including Argyreia, Astripomoea, Lepistemon, Rivea, Stictocardia, and Turbina. Support for the paraphyly of Ipomoea was found based on phylogenetic analysis of 45 taxa using DNA sequences (the ITS region and three exons and two introns of the 3&rsquo; end of the nuclear gene waxy) in combination with morphological data. Two major clades within Ipomoea s. l. were resolved in the strict consensus of 16 most parsimonious trees. One clade included most of the smaller segregate genera interspersed with species of Ipomoea, whereas the other was formed by Ipomoea s.s. and Astripomoea. Our results also indicated the genus Turbina is polyphyletic and Rivea is nested within Argyreia. Together, these results suggest new phylogenetic interpretations and point towards a revised view of the nature of morphological evolution among these taxa. We used both our current understanding of morning glory systematics and the distribution of character state variation in seven taxonomically important characters to demonstrate that: 1) the common Ipomoea form is widely distributed, 2) the common form has given rise to specialized forms exhibiting a diversity of character state combinations, and 3) many of the specialized forms have arisen repeatedly. On the basis of these observations, we forward a general model of mosaic evolution that emphasizes extreme evolutionary lability in morphology among morning glory species.</p>
1 aManos, Paul, S1 aMiller, Richard, E1 aWilkin, Paul  uhttps://ipomoeeae.myspecies.info/node/33