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  • 1.
    Bengtson, Annika
    et al.
    Swedish Museum of Natural History, Department of Botany.
    Anderberg, Arne A.
    Swedish Museum of Natural History, Department of Botany.
    Razafimandimbison, Sylvain G.
    Swedish Museum of Natural History, Department of Botany.
    The Malagasy enigmatic genus Apodocephala (Asteraceae), a new member of the tribe Athroismeae2021In: Willdenowia, ISSN 0511-9618, E-ISSN 1868-6397, Vol. 51, no 2, p. 221-230Article in journal (Refereed)
    Abstract [en]

    Apodocephala is a small genus of nine species of shrubs and trees endemic to Madagascar and currently classified in the tribe Astereae (Asteraceae). However, its present tribal position has been questioned, as it lacks some of the salient morphological features of that tribe. This study includes for the first time DNA sequences from Apodocephala (two species including the type of the generic name) to test its phylogenetic position. Phylogenetic analyses based on sequence data from nuclear ribosomal (ETS and ITS) and plastid (ndhF and trnL–trnF) DNA regions, using Bayesian inference and maximum parsimony methods, strongly reject the placement of Apodocephala in the Astereae. Our results, instead, support its position as sister to the Malagasy monospecific genus Lowryanthus within the tribe Athroismeae. Morphological comparison of these sister genera reveal similarities in cypsela morphology, and the inclusion of Apodocephala in the subtribe Lowryanthinae is proposed here. The tribe Athroismeae is now represented by ten genera (Anisochaeta, Anisopappus, Apodocephala, Artemisiopsis, Athroisma, Blepharispermum, Centipeda, Leucoblepharis, Lowryanthus and Symphyllocarpus), six of which occur in Madagascar. The Malagasy Athroismeae occur in all Malagasy terrestrial ecosystems (rainforests, deciduous dry forests, thicket spiny forests and savannas) and are likely the result of multiple independent colonization events mostly from mainland Africa.

  • 2.
    Bengtson, Annika
    et al.
    Swedish Museum of Natural History, Department of Botany.
    Razafimandimbison, Sylvain
    Swedish Museum of Natural History, Department of Botany.
    New subtribal and generic limits in the tribe Athroismeae (Asteraceae) and further disintegration of the subtribe Madagasterinae of the tribe Astereae2024In: Willdenowia, ISSN 0511-9618, E-ISSN 1868-6397, Vol. 54, no 1, p. 103-116Article in journal (Refereed)
    Abstract [en]

    The Astereae subtribe Madagasterinae (Asteraceae) sensu Nesom encompassing four Malagasy genera (Apodocephala, Madagaster, Rochonia and Vernoniopsis) is polyphyletic, as Apodocephala is a member of the Malagasy subtribe Lowryanthina of the tribe Athroismeae. While Madagaster was shown to belong to Astereae, the phylogenetic positions of Rochonia and Vernoniopsis (now Jalantzia) in this tribe remained to be tested with molecular data. Lowryanthinae presently contains Apodocephala with nine species and the monospecific Lowryanthus. The monophyly of Apodocephala remained to be assessed using a comprehensive sampling. The aims were to: (1) assess the phylogenetic placements of Rochonia and Jalantzia (Vernoniopsis) and test the monophyly of Jalantzia; (2) assess phylogenetic relationships within Lowryanthinae; and (3) re-assess the subtribal and generic limits within the tribe Athroismeae. New phylogenetic analyses based on plastid sequence data confirmed the position of Rochonia in Astereae. Jalantzia (Vernoniopsis) was resolved as sister to the subtribe Lowryanthinae and therefore transferred to Athroismeae. A new subtribe, Jalantziinae, is described to accommodate Jalantzia. Apodocephala is paraphyletic with respect to Lowryanthus, which is formally merged with Apodocephala. A description of the emended subtribe Madagasterinae containing Madagaster and Rochonia is presented.

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    fulltext
  • 3.
    Klackenberg, Jens
    Swedish Museum of Natural History, Department of Botany.
    New species of Apocynaceae from Madagascar2019In: Willdenowia, ISSN 0511-9618, E-ISSN 1868-6397, Vol. 49, no 2, p. 209-229Article in journal (Refereed)
    Abstract [en]

    Preparation of a treatment of the family Apocynaceae for the Flore de Madagascar et des Comoresnecessitates the description of 11 new species and one new variety in subfamilies Periplocoideae (Baroniella effusaPentopetia suarezensis) and Secamonoideae (Calyptranthera punctulataCroseaPervillaea lanataSecamone chouxiiS. dictyoneuraS. furcataS. glabraS. laevisS. parviflora and S. toxocarpoides var. incana). Furthermore, an amended description of Pervillaea tomentosa is provided necessitated by an earlier confusion of this taxon with P. brevirostris (here synonymized) and with the new species P. lanata.

  • 4.
    Sadowski, Eva-Maria
    et al.
    Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science.
    Schmidt, Alexander R.
    Department of Geobiology, University of Göttingen.
    Denk, Thomas
    Swedish Museum of Natural History, Department of Paleobiology.
    Staminate inflorescences with in situ pollen from Eocene Baltic amber reveal high diversity in Fagaceae (oak family)2020In: Willdenowia, ISSN 0511-9618, E-ISSN 1868-6397, Vol. 50, p. 405-517Article in journal (Refereed)
    Abstract [en]

    Eocene Baltic amber forms the largest amber deposit worldwide; however, its source vegetation and climateare much debated. Representatives of the oak family (Fagaceae) were abundant in the Baltic amber source areabased on numerous inclusions of staminate inflorescences or individual florets, previously assigned to Castanea andQuercus. However, the actual generic and infrageneric diversity of Fagaceae from Baltic amber remained unknown.Using flower characteristics and section-diagnostic in situ pollen of staminate inflorescences and detached floret inclusions,we describe 18 fossil-species of Fagaceae making this family by far the most diverse plant family preservedin Baltic amber. We substantiate the occurrence of the Castaneoideae, Quercoideae (Quercus sect. Cyclobalanopsis/ Lobatae; Q. sect. Lobatae; Q. sect. Protobalanus), Trigonobalanoideae and the extinct genus Eotrigonobalanus.Among the 18 fossil-species, six are described as new: Q. aimeeana, Q. casparyi, Q. multipilosa, E. campanulata,E. conwentzii, E. longianthera; and one new combination is published: Q. brachyandra (≡ Castanea brachyandra).In addition, a lectotype is designated for the name Quercites meyerianus and neotypes are designated for the namesCastanea inclusa and Quercus longistaminea (≡ C. longistaminea). Members of the Fagaceae probably inhabitedazonal and zonal vegetation types of the amber source area, including bottomland flood-plains and stream banks(Q. sect. Lobatae), dry habitats (Q. sect. Lobatae, Q. sect. Protobalanus), peaty soils, riparian and swamp forests(Castanopsis, Eotrigonobalanus), as well as mixed mesophytic forests (castaneoids, Quercoideae, trigonobalanoids).Affinities to extant North American and E to SE Asian floras support the recent notion that late Eocene Baltic amber(38 – 34 Ma) was formed in a warm-temperate climate.

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    Sadowski et al 2020 Baltic amber Fagaceae
  • 5. Stångberg, Frida
    et al.
    Anderberg, Arne Alfred
    Swedish Museum of Natural History, Department of Botany.
    Morphology and taxonomic reclassification of Gorteria (Asteraceae)2014In: Willdenowia, ISSN 0511-9618, E-ISSN 1868-6397, Vol. 44, p. 97-120Article in journal (Refereed)
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