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Abstract Detail


Allen, Maya [1], Ayers, Tina [2].

Resolving the Phylogeny of the Genus Glossopetalon (Crossosomataceae).

Glossopetalon (Gray, 1853) inhabits arid, limestone regions in the American Southwest and northern Mexico. The genus is comprised of four species: G. clokeyi; G. pungens; G. texense; and G. spinescens, which has six varieties. Three of the species are endemic and the fourth, G. spinescens, is the only widespread species. The cryptic, intricately branched shrub varieties of G. spinescens have been difficult to identify due to the lack of morphological characters. Characters used to distinguish the varieties of G. spinescens such as coloration, blade size, and presence of stipules, are highly variable among populations. To date the phylogeny of this genus has not been resolved; therefore, the species relationships and validity of the six varieties of G. spinescens' are unknown. A custom protocol of double digest restriction-site associated DNA sequencing (ddRAD) was used to resolve the phylogeny of the genus Glossopetalon and address if molecular data corroborates the varieties of G. spinescens. Based on this information, conservation and management efforts can be re-examined or implemented for rare, endemic taxa in order to preserve the biodiversity of this genus. Future studies can utilize the results of this study to help resolve the origin of the Crossosomataceae and further examine the ancestral relationship with the east Asian sister taxon, Stachyuraceae.

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1 - Northern Arizona University, Department Of Biological Sciences, 923 West University Avenue APT 117, Flagstaff, AZ, 86001, United States
2 - Northern Arizona University, Biological Sciences, 617 South Beaver Street, Flagstaff, AZ, 86011, United States


Presentation Type: Oral Paper
Session: COOL1, ASPT Cooley Award Talks
Location: Tucson C/Starr Pass
Date: Tuesday, July 30th, 2019
Time: 8:45 AM
Number: COOL1004
Abstract ID:504
Candidate for Awards:George R. Cooley Award

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