ISSN:
1615-6110
Keywords:
Magnoliales
;
Annonaceae
;
Palynology
;
phylogeny
;
cladistics
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Phylogenetic analyses based on morphology placeAnaxagorea and other taxa with granular monosulcate pollen, as in otherMagnoliales, at the base ofAnnonaceae. Taxa with columellar tetrads, granular tetrads, and inaperturate monads form a derived clade. To test the systematic importance of palynology, we analyzed the data set with pollen characters removed. The result was lower resolution and a different rooting of the family, betweenUvariopsis and other groups with columellar tetrads.Anaxagorea and other monosulcates are higher in the tree, implying that granular monosulcate pollen, laminar stamens, and irregular endosperm ruminations are reversals. This rooting is highly unparsimonious when pollen characters are included, and only weakly supported over theAnaxagorea rooting when pollen is excluded. Together with preliminary molecular analyses, these experiments confirm the special value of palynology in systematics ofAnnonaceae.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00987945
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