Sunday, December 4, 2016

[Botany • 2014] Jailoloa halmaherensis, Manjekia maturbongsii & Wallaceodoxa raja-ampat • Three New Genera of Arecoid Palm (Arecaceae) from eastern Malesia


Fig. 7. Wallaceodoxa raja-ampat Heatubun & W. J. Baker.
A crown; B inflorescence, inset showing congested floral triads; C indumentum on petiole base; D close-up of indumentum; E fruit; F endocarp.
Photos: C.D. Heatubun |  DOI: 10.1007/S12225-014-9525-X

ABSTRACT
 Recent botanical exploration in eastern Malesia has resulted in the discovery of three spectacular palm taxa that have proved difficult to assign to genus. New evidence from molecular phylogenetic research indicates that these taxa should now be recognised as three monotypic genera. Here, we describe these genera as new to science, all of which are members of subtribe Ptychospermatinae (Areceae: Arecoideae). Jailoloa Heatubun & W. J. Baker is restricted to ultramafic vegetation in a single site in Halmahera and is Critically Endangered due to nickel mining. Manjekia W. J. Baker & Heatubun is scattered throughout the limestone vegetation of Biak Island, east of the Bird's Head Peninsula of New Guinea, and is Endangered, although parts of its distribution fall within a protected area. Wallaceodoxa Heatubun & W. J. Baker, named to mark the centenary of Alfred Russel Wallace's death, is found on Gag and Waigeo, two of the Raja Ampat Islands west of the Bird's Head Peninsula, where it is Critically Endangered due to its small and rapidly reducing population. Full morphological descriptions are provided with detailed comparisons with related genera, alongside a revised key to the genera of Ptychos-permatinae. These new genera are unexpected additions to the palm flora of Malesia, and demand urgent conservation attention.

Keywords: Biodiversity, Eastern Indonesia, Maluku, Moluccas, New Guinea, Palmae


Jailoloa halmaherensis (Heatubun) Heatubun & W. J. Baker



Manjekia maturbongsii (W. J. Baker & Heatubun) W. J. Baker & Heatubun

Wallaceodoxa Heatubun & W. J. Baker
Wallaceodoxa raja-ampat Heatubun & W. J. Baker sp. nov. 
named to mark the centenary of Alfred Russel Wallace's death, is found on Gag and Waigeo, two of the Raja Ampat Islands west of the Bird's Head Peninsula, where it is Critically Endangered due to its small and rapidly reducing population. 


Type: Indonesia, Raja Ampat Islands Regency, Waigeo Island, Waisai, Kelurahan Warmasen, behind Kantor Bupati, forest on right side of road to Pari Convention Centre Building (tanjakan gedung Pari), 15 April 2011, Heatubun et al. 1126 (holotype MAN!; isotypes BO!, K!).


ETYMOLOGY. The generic name commemorates Alfred Russel Wallace, the great English naturalist and codiscoverer of the theory of evolution by natural selection, who visited Waigeo in the Raja Ampat Islands in 1860 during his celebrated Malay Archipelago travels (Wallace 1869; van Wyhe 2013). This eponymy marks the centenary of his death on 7 November 1913. The generic name is derived by suffixing Wallace’s surname with the Greek word (-doxa) to mean “to the glory of Wallace”


Charlie D. Heatubun, Scott Zona and William J. Baker. 2014.  Three New Genera of Arecoid Palm (Arecaceae) from eastern Malesia.
 Kew Bulletin. 69(3):9525. DOI: 10.1007/S12225-014-9525-X
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