TY - JOUR
T1 - Phylogeographic structure in the bogus yucca moth Prodoxus quinquepunctellus (Prodoxidae)
T2 - Comparisons with coexisting pollinator yucca moths
AU - Althoff, David M.
AU - Groman, Joshua D.
AU - Segraves, Kari A.
AU - Pellmyr, Olle
N1 - Funding Information:
Specimens, site information, and field assistance were generously provided by E. Augenstein, J. Berger, R. Brown, K. Clary, B. Crabb, N. Cobb, R. Hagen, J. Keyes, J. Leebens-Mack, E. Menges, and R. Yahr. Permission to collect moths was kindly provided by Archbold Biological Station, Big Bend National Park, Black Gap Wildlife Management Area, Laguna Atascosa National Wildlife Refuge, Walnut Canyon National Monument, Jornada Long Term Ecological Reserve, Ocala National Forest, and Withlacochee State Forest. Collection access and loans were provided by the Smithsonian Institution (D. R. Davis), University of California-Berkeley (J. A. Powell), Los Angeles County Museum of Natural History (J. Donahue), Colorado State University (B. Kondratieff and P. Opler), University of Colorado (V. Scott), the Florida State Collection of Arthropods (J. Hepp-ner), the Canadian National Collection (J.-F. Landry), Harvard University (P. Perkins), and Edward Knudson. H. Bonar, A. Grimes, P. Johnson, M. Lacey, and E. Weiss provided help with DNA sequencing. We thank B. Crabb for helpful discussions about the manuscript and J. Leebens-Mack for his advice on the molecular clock estimates. The work was funded by a grant from the National Geographic Society and by National Science Foundation grants from the Ecology and Systematic Biology programs.
PY - 2001
Y1 - 2001
N2 - The pollination mutualism between yucca moths and yuccas highlights the potential importance of host plant specificity in insect diversification. Historically, one pollinator moth species, Tegeticula yuccasella, was believed to pollinate most yuccas. Recent phylogenetic studies have revealed that it is a complex of at least 13 distinct species, eight of which are specific to one yucca species. Moths in the closely related genus Prodoxus also specialize on yuccas, but they do not pollinate and their larvae feed on different plant parts. Previous research demonstrated that the geographically widespread Prodoxus quinquepunctellus can rapidly specialize to its host plants and may harbor hidden species diversity. We examined the phylogeographic structure of P. quinquepunctellus across its range to compare patterns of diversification with six coexisting pollinator yucca moth species. Morphometric and mtDNA cytochrome oxidase I sequence data indicated that P. quinquepunctellus as currently described contains two species. There was a deep division between moth populations in the eastern and the western United States, with limited sympatry in central Texas; these clades are considered separate species and are redescribed as P. decipiens and P. quinquepunctellus (sensu stricto), respectively. Sequence data also showed a lesser division within P. quinquepunctellus s.s. between the western populations on the Colorado Plateau and those elsewhere. The divergence among the three emerging lineages corresponded with major biogeographic provinces, whereas AMOVA indicated that host plant specialization has been relatively unimportant in diversification. In comparison, the six pollinator species comprise three lineages, one eastern and two western. A pollinator species endemic to the Colorado Plateau has evolved in both of the western lineages. The east-west division and the separate evolution of two Colorado Plateau pollinator species suggest that similar biogeographic factors have influenced diversification in both Tegeticula and Prodoxus. For the pollinators, however, each lineage has produced a monophagous species, a pattern not seen in P. quinquepunctellus.
AB - The pollination mutualism between yucca moths and yuccas highlights the potential importance of host plant specificity in insect diversification. Historically, one pollinator moth species, Tegeticula yuccasella, was believed to pollinate most yuccas. Recent phylogenetic studies have revealed that it is a complex of at least 13 distinct species, eight of which are specific to one yucca species. Moths in the closely related genus Prodoxus also specialize on yuccas, but they do not pollinate and their larvae feed on different plant parts. Previous research demonstrated that the geographically widespread Prodoxus quinquepunctellus can rapidly specialize to its host plants and may harbor hidden species diversity. We examined the phylogeographic structure of P. quinquepunctellus across its range to compare patterns of diversification with six coexisting pollinator yucca moth species. Morphometric and mtDNA cytochrome oxidase I sequence data indicated that P. quinquepunctellus as currently described contains two species. There was a deep division between moth populations in the eastern and the western United States, with limited sympatry in central Texas; these clades are considered separate species and are redescribed as P. decipiens and P. quinquepunctellus (sensu stricto), respectively. Sequence data also showed a lesser division within P. quinquepunctellus s.s. between the western populations on the Colorado Plateau and those elsewhere. The divergence among the three emerging lineages corresponded with major biogeographic provinces, whereas AMOVA indicated that host plant specialization has been relatively unimportant in diversification. In comparison, the six pollinator species comprise three lineages, one eastern and two western. A pollinator species endemic to the Colorado Plateau has evolved in both of the western lineages. The east-west division and the separate evolution of two Colorado Plateau pollinator species suggest that similar biogeographic factors have influenced diversification in both Tegeticula and Prodoxus. For the pollinators, however, each lineage has produced a monophagous species, a pattern not seen in P. quinquepunctellus.
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U2 - 10.1006/mpev.2001.0995
DO - 10.1006/mpev.2001.0995
M3 - Article
C2 - 11603942
AN - SCOPUS:0034775423
SN - 1055-7903
VL - 21
SP - 117
EP - 127
JO - Molecular Phylogenetics and Evolution
JF - Molecular Phylogenetics and Evolution
IS - 1
ER -