|
Malagasy/Indo-australo-malesian Phytogeographic Connections
Home | Introduction | Gondwanan Relicts | "Lemurian Stepping Stones"
Long Distance Dispersal | Conclusion | References
The Western Species of Nepenthes
Paleochorological
analysis reveals that Nepenthes was originally a Laurasian
element surviving in Europe into the lower Miocene, at the same
time as it arrived in Borneo (Krutzsch 1989). The small seeds of
Nepenthes are undoubtedly easily dispersed, and one could
envision long distance dispersal from Malesia to Madagascar.
Nevertheless, Schmid-Hollinger (1979) has suggested that the
Western Indian Ocean species of Nepenthes (N. distillatoria - Sri
Lanka; N. pervillei - Seychelles; N. madagascariensis and N.
masoalensis - Madagascar) form a closely-related group, implying
a single initial dispersal event from Malesia.
Additional possible examples of "Lemurian Stepping-stones"
dispersal: Anisophyllea (Anisophylleaceae); Fernandoa
(Bignoniaceae); some Clusiaceae (?) - Calophyllum; some
Euphorbiaceae (?) - Claoxylon, Macaranga; Homalium, Scolopia
(Flacourtiaceae); Hugonia (Hugoniaceae); Foetidia
(Lecythidaceae); Leea (Leeaceae); Medinilla, Memecylon
(Melastomataceae); Turraea (Meliaceae); Streblus (Moraceae);
Ardisia (Myrsinaceae); Paropsia (Passifloraceae); Gaertnera,
Ixora, Psychotria, Pyrostria (Rubiaceae).
<< BACK | TOP | NEXT >>
|