| Abstract Detail
Biogeography Wolfe, Andi [1], Blischak, Paul [2]. Updates on Penstemon evolutionary pattern and process. Penstemon (Plantaginaceae) is a remarkably diverse genus endemic to North America. Its diversification is orders of magnitude greater than close relatives in the tribe Cheloneae. For example, Pennellianthus is monotypic, Keckiella has seven species, Chelone has four species, Nothochelone is monotypic, Chionophila, its sister genus, has two species, and the Collinsia/Tonella clade has ca. a couple of dozen species. The bulk of its diversification happened in the most recent 1–1.5 million years, during the middle of the Pleistocene. The major and minor glaciation events during the Pleistocene created ecological opportunity and was likely the cause of extinction for some lineages within the genus. The dispersal across North America coincides with glacial advance and retreat. We examined patterns of diversification in the context of the Pleistocene and use our phylogenetic results to propose revisions to the subgeneric and sectional classification for Penstemon.
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1 - Ohio State University, Department Of Evolution, Ecology And Organismal Biology, 318 W. 12th Avenue, Columbus, OH, 43210, United States
2 - Ohio State University, EEOB
Keywords:
Penstemon
Plantaginaceae
biogeography
Pleistocene
diversification.
Presentation Type: Oral Paper
Session: BIOGII, BIOGEOGRAPHY II
Location: Virtual/Virtual
Date: Tuesday, July 20th, 2021
Time: 10:15 AM(EDT)
Number: BIOGII002
Abstract ID:583
Candidate for Awards:None |
