Comparative Pollen Morphology of the Madagascan Genera of Myristicaceae (<i>Mauloutchia, Brochoneura</i>, and<i>Haematodendron</i>)

Walker, James W.; Walker, Audrey G.

doi:10.1080/00173138109436731

Cited by 31 publications

(25 citation statements)

References 3 publications

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“…Schuster, 1976). Myristicaceae occur in South America, Africa, Madagascar, and Asia, but their highest generic diversity is in South America and Africa, and the most primitive taxa occur in Madagascar {Brochoneura, Mauloutchia), suggesting a Northern Gondwanan origin (Walker, 1971;Walker and Walker, 1981). Because of the scattered distribution of other Magnoliales, the ancestral area for Annonaceae as a whole is ambiguous.…”

Section: Inaperturatesmentioning

confidence: 99%

Phylogeny and Geographic History of Annonaceae

Doyle¹,

Thomas²

2007

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Whereas Takhtajan and Smith situated the origin of angiosperms between Southeast Asia and Australia, Walker and Le Thomas emphasized the concentration of primitive pollen types of Annonaceae in South America and Africa, suggesting instead a Northern Gondwanan origin for this family of primitive angiosperms. A cladistic analysis of Annonaceae shows a basal split of the family into Anaxagorea, the only genus with an Asian and Neotropical distribution, and a basically African and Neotropical line that includes the rest of the family. Several advanced lines occur in both Africa and Asia, one of which reaches Australia. This pattern may reflect the following history: (a) disjunction of Laurasian (Anaxagorea) and Northern Gondwanan lines in the Early Cretaceous, when interchanges across the Tethys were still easy and the major lines of Magnoliidae are documented by paleobotany; (b) radiation of the Northern Gondwanan line during the Late Cretaceous, while oceanic barriers were widening; (c) dispersal of African lines into Laurasia due to northward movement of Africa and India in the Early Tertiary, attested by the presence of fossil seeds of Annonaceae in Europe, and interchanges between North and South America at the end of the Tertiary.

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Section: Inaperturatesmentioning

confidence: 99%

Phylogeny and Geographic History of Annonaceae

Doyle¹,

Thomas²

2007

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“…1), Myristicaceae and Annonaceae were scored as unknown because they include both granular and columellar taxa. In Myristicaceae, Walker & Walker (1981) assumed that granular structure was primitive, but and showed that the supposedly granular taxa (most of which actually have intermediate structure) are nested within the family, indicating that the ancestral exine was reticulate-columellar. In the present analysis (Fig.…”

Section: Eumagnoliids and Eudicotsmentioning

confidence: 99%

Early evolution of angiosperm pollen as inferred from molecular and morphological phylogenetic analyses

Doyle¹

2005

Grana

109

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“…which seem basal because they have relatively unfused, spiral stamens : cl. Walker and Walker, 1981 ), others as uncertain, to allow forthe possibil~y of either state being basic. For binary characters, scoring taxa as unknown (?…”

Section: Data and Analysesmentioning

confidence: 99%

Cladistic analysis and pollen evolution inAnnonaceae

Doyle

Thomas

1994

Acta Botanica Gallica

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Summary.-To evaluate hypotheses on pollen evolution in Annonaceae, we present a cladistic analysis, using both palynological and non-palynological characters, and Including other Magnoliales as outgroups. As previously pro· posed, the Inferred basic pollen type Is single (monads) and monosulcate, with granular infratectal structure (Interstitium), but with a few nexlnal foliations. Permanent tetrads originated in two major lines : the xylopioids, corres· ponding to part of Walker's Fusaea subfamily but excluding Fusaea, with granular structure and a nexine of fused granules ; and the annonolds, corras· ponding to Walker's Annona subfamily, with columellar structure and a complexly foliated nexine. The single grains of /solona are secondarily derived from tetrads. Sulculate pollen arose in both monosulcate and inaperturate lines. The genus Polya/thia, which has unusually diverse pollen, appears to be polyphyletic. Columellar structure originated in smooth monosulcates with granular structure, leading to the malmeoids, and in forms with larger, irregular granules, in the disulculate Polyalthia group and possibly the annonoids.

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Comparative Pollen Morphology of the Madagascan Genera of Myristicaceae (Mauloutchia, Brochoneura, andHaematodendron)

Cited by 31 publications

References 3 publications

Phylogeny and Geographic History of Annonaceae

Phylogeny and Geographic History of Annonaceae

Early evolution of angiosperm pollen as inferred from molecular and morphological phylogenetic analyses

Cladistic analysis and pollen evolution inAnnonaceae

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