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Abstract Detail



Systematics Section/ASPT

Herschlag, Rachel [1], Thomas, Duncan [2], Schenk, John [3].

Describing a new species into a polyphyletic genus:  Taxonomic Novelty in Ledermanniella s.l. (Podostemaceae) from Cameroon.

Ledermanniella (Podostemaceae) occurs in western Africa, where species are commonly localized to single rapids or waterfalls.  Recent collecting efforts in this region have led to the discovery of new species diversity; however, recent molecular phylogenetic analyses estimate the genus to be polyphyletic and associated with at least nine other genera.  Here, we describe a new species of Ledermanniella s.l. while addressing the problem of describing a species into a polyphyletic genus with a phylogenetic approach.  We sampled species diversity for molecular and morphological data and combined them with morphological data only from the new species, which we were unable to sequence because of non-optimal DNA preservation or other reasons.  We tested and rejected the monophyly of Ledermanniella s.l. and the subgenus Ledermanniella with the Shimodaira-Hasegawa test, and estimated the phylogenetic placement of the new species with Bayesian inference.  We describe Ledermanniella achoundongii, which we estimate as being sister to the Ledermanniella onanae­–Ledermanniella keayi clade.  The morphological and phylogenetic consequences of these results are discussed, including leaf homologies, along with a description of the ecological, distributional, and conservation implications of the new species and western African Ledermanniella s.l.


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1 - Tulane University, Department of Ecology and Evolutionary Biology, 400 Lindy Boggs Center, New Orleans, fLA, 70118-5698, USA
2 - Washington State University Vancouver, Biology Department, Vancouver, WA, 98686, USA
3 - Tulane University, Department of Ecology and Evolutionary Biology, 400 Lindy Boggs Center, New Orleans, LA, 70118-5698, USA

Keywords:
endemism
Podostemaceae
species description.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Eyrie/Boise Centre
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PSY022
Abstract ID:68
Candidate for Awards:None


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