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| Afropectinariella doratophylla (Summerh.) M.Simo & Stévart
in Simo-Droissart, Sonké, Droissart & Stévart, 2018.
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Abstract
A recent phylogenetic study showed that species assigned to the newly recognised genus Pectinariella Szlach., Mytnik & Grochocka (previously treated as Angraecum Bory sect. Pectinaria Benth.) are polyphyletic, comprising a clade with species primarily in Madagascar and the Western Indian Ocean islands (including the type) and another non-sister clade whose members occur in continental Africa and the Gulf of Guinea islands. In order to render Pectinariella monophyletic, the five continental African species must therefore be removed. A new genus, Afropectinariella M.Simo & Stévart, is described and the following combinations are made: Afropectinariella atlantica (Stévart & Droissart) M.Simo & Stévart, Afropectinariella doratophylla (Summerh.) M.Simo & Stévart, Afropectinariella gabonensis (Summerh.) M.Simo & Stévart, Afropectinariella pungens (Schltr.) M.Simo & Stévart and Afropectinariella subulata (Lindl.) M.Simo & Stévart.
Keywords: Angraecoid orchids, continental Africa, Malagasy and Indian Ocean islands, Pectinaria, phylogenetics, taxonomy
Taxonomy
Afropectinariella M.Simo & Stévart, gen. nov.
Type: Afropectinariella doratophylla (Summerh.) M.Simo & Stévart
[≡ Angraecum doratophyllum Summerh.].
Etymology: The name of the genus is based on the geographic distribution of its five species, all of which occur in Africa and the generic name Pectinariella in which they were previously placed.
Diagnosis: Afropectinariella resembles the related genera Dolabrifolia and Pectinariella in having a sessile ovary, i.e. without a pedicel and with a very short peduncle that is hardly developed, but differs from Dolabrifolia by its elongate leaves that are never compressed laterally (vs. imbricate and laterally compressed) and from Pectinariella by its transversely oval lip that is wider than long (vs. the lip longer that wide) and its occurrence in continental Africa and Gulf of Guinea islands (vs. Madagascar and adjacent islands).
Afropectinariella atlantica (Stévart & Droissart) M.Simo & Stévart, comb. nov.
Angraecum atlanticum Stévart et al. (2010: 253).
Type: Equatorial Guinea (Rio Muni). Monte Alén National Park: Engong inselberg, ....
Afropectinariella doratophylla (Summerh.) M.Simo & Stévart, comb. nov .
Angraecum doratophyllum Summerhayes (1937: 465).
Type: São Tomé and Príncipe (São Tomé Island) Vanhulst (Macambrará): virgin forest, 1,050–1,200 m alt., ....
Afropectinariella gabonensis (Summerh.) M.Simo & Stévart, comb. nov.
Angraecum gabonense Summerhayes (1954: 587).
Type: Gabon. Upper Ngounyé River, Nimalaba, N. E. of Les Echiras, ....
Afropectinariella pungens (Schltr.) M.Simo & Stévart, comb. nov.
Angraecum pungens Schlechter (1906: 163).
Type: Cameroon. Man O’War Bay, auf Baümen bei Kriegschiffhafen, ....
Afropectinariella subulata (Lindl.) M.Simo & Stévart, comb. nov.
Angraecum subulatum Lindley (1837: 206).
Type: Nigeria. Nun River: s. d., ....
Murielle Simo-Droissart, Bonaventure Sonké, Vincent Droissart and Tariq Stévart. 2018. Afropectinariella (Vandeae, Orchidaceae), A New Genus of the Angraecum Alliance. PhytoKeys. 96: 79-86. DOI: 10.3897/phytokeys.96.23933
Résumé: Une analyse phylogénétique récente a montré que les espèces attribuées au nouveau genre Pectinariella Szlach., Mytnik & Grochocka (anciennement Angraecum Bory sect. Pectinaria Benth.) forment un groupe polyphylétique, comprenant un clade avec des espèces présentes principalement à Madagascar et dans les îles de l'ouest de l'Océan Indien (incluant le type) et un autre clade qui ne lui est pas apparenté et dont les espèces sont distribuées en Afrique continentale et dans les îles du Golfe de Guinée. Afin de rétablir la monophylie du genre Pectinariella, les cinq espèces d’Afrique continentale et des îles du Golfe de Guinée doivent donc en être exclues. Un nouveau genre, Afropectinariella M.Simo & Stévart, est décrit et les combinaisons suivantes sont proposées: Afropectinariella atlantica (Stévart & Droissart) M.Simo & Stévart, Afropectinariella doratophylla (Summerh.) M.Simo & Stévart, Afropectinariella gabonensis (Summerh.) M.Simo & Stévart, Afropectinariella pungens (Schltr.) M.Simo & Stévart et Afropectinariella subulata (Lindl.) M.Simo & Stévart.
