Abstract Detail

Pteridological Section/AFS

Abdul-Salim, K. [2], Motley, Timothy J. [2], Moran, Robbin [1].

Elaphoglossum (Elaphoglossaceae) section Squamipedia: phylogenetic relationships based on chloroplast trnL-trnF and rps4-trnS sequences.

Elaphoglossum sect. Squamipedia, as considered in revisionary work by Moran and Mickel (in prep), consists of 10 species, E. anthracinum, E. blepharum, E. concinnum, E. deltoideum, E. lloense, E. moorei, E. peltatum, E. revolutum, E. squamipes and E. tripartitum. They are characterized by their very small fronds, long-creeping rhizomes, echinulate spores, and paired peglike aerophores on the rhizome. This subsection has been confirmed as a monophyletic lineage on the basis of chloroplast DNA sequence data (Rouhan et al. in prep). In order to examine species relationships within this lineage, we performed a phylogenetic analysis of the section using two non-coding chloroplast spacers: trnL-trnF and rps4-trnS. We included representative accessions of all 10 species, using Bolbitis auriculata, Lomariopsis pollicina, and Elaphoglossum aemulum as outgroups. Results of the combined analysis are consistent with the morphological sectional classification of Mickel and Atehortúa (1980). However, the placement of species within the lineage is largely incongruent with the subsections proposed in the aforementioned conspectus. Using the phylogeny as a framework, we examine evolutionary trends in several gross morphological and micromorphological characters.

1 - New York Botanical Garden, Institute of Systematic Botany, 200th St & Kazimiroff Blvd, Bronx, New York, 10458, USA
2 - New York Botanical Garden, Cullman Program for Molecular Systematics Studies, 200th St. & Southern Blvd., Bronx, New York, 10458-5126, USA

Keywords:
Elaphoglossaceae
Elaphoglossum
sect. Squamipedia
trnL-trnF
rps4-trnS.

Presentation Type: Poster
Session: 32-69
Location: Special Event Center (Cliff Lodge)
Date: Tuesday, August 3rd, 2004
Time: 12:30 PM
Abstract ID:824