19 results on '"Foottit, Robert"'
Search Results
2. Ancient and modern colonization of North America by hemlock woolly adelgid, Adelges tsugae (Hemiptera: Adelgidae), an invasive insect from East Asia.
- Author
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Havill NP, Shiyake S, Lamb Galloway A, Foottit RG, Yu G, Paradis A, Elkinton J, Montgomery ME, Sano M, and Caccone A
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- Animals, Bayes Theorem, DNA, Mitochondrial genetics, Asia, Eastern, Genotype, Herbivory, Microsatellite Repeats, North America, Sequence Analysis, DNA, Genetics, Population, Hemiptera genetics, Hemlock, Introduced Species
- Abstract
Hemlock woolly adelgid, Adelges tsugae, is an invasive pest of hemlock trees (Tsuga) in eastern North America. We used 14 microsatellites and mitochondrial COI sequences to assess its worldwide genetic structure and reconstruct its colonization history. The resulting information about its life cycle, biogeography and host specialization could help predict invasion by insect herbivores. We identified eight endemic lineages of hemlock adelgids in central China, western China, Ulleung Island (South Korea), western North America, and two each in Taiwan and Japan, with the Japanese lineages specializing on different Tsuga species. Adelgid life cycles varied at local and continental scales with different sexual, obligately asexual and facultatively asexual lineages. Adelgids in western North America exhibited very high microsatellite heterozygosity, which suggests ancient asexuality. The earliest lineages diverged in Asia during Pleistocene glacial periods, as estimated using approximate Bayesian computation. Colonization of western North America was estimated to have occurred prior to the last glacial period by adelgids directly ancestral to those in southern Japan, perhaps carried by birds. The modern invasion from southern Japan to eastern North America caused an extreme genetic bottleneck with just two closely related clones detected throughout the introduced range. Both colonization events to North America involved host shifts to unrelated hemlock species. These results suggest that genetic diversity, host specialization and host phylogeny are not predictive of adelgid invasion. Monitoring non-native sentinel host trees and focusing on invasion pathways might be more effective methods of preventing invasion than making predictions using species traits or evolutionary history., (© 2016 John Wiley & Sons Ltd.)
- Published
- 2016
- Full Text
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3. The hemiptera (insecta) of Canada: constructing a reference library of DNA barcodes.
- Author
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Gwiazdowski RA, Foottit RG, Maw HE, and Hebert PD
- Subjects
- Animals, Canada, Hemiptera classification, Species Specificity, DNA Barcoding, Taxonomic, Gene Library, Hemiptera genetics
- Abstract
DNA barcode reference libraries linked to voucher specimens create new opportunities for high-throughput identification and taxonomic re-evaluations. This study provides a DNA barcode library for about 45% of the recognized species of Canadian Hemiptera, and the publically available R workflow used for its generation. The current library is based on the analysis of 20,851 specimens including 1849 species belonging to 628 genera and 64 families. These individuals were assigned to 1867 Barcode Index Numbers (BINs), sequence clusters that often coincide with species recognized through prior taxonomy. Museum collections were a key source for identified specimens, but we also employed high-throughput collection methods that generated large numbers of unidentified specimens. Many of these specimens represented novel BINs that were subsequently identified by taxonomists, adding barcode coverage for additional species. Our analyses based on both approaches includes 94 species not listed in the most recent Canadian checklist, representing a potential 3% increase in the fauna. We discuss the development of our workflow in the context of prior DNA barcode library construction projects, emphasizing the importance of delineating a set of reference specimens to aid investigations in cases of nomenclatural and DNA barcode discordance. The identification for each specimen in the reference set can be annotated on the Barcode of Life Data System (BOLD), allowing experts to highlight questionable identifications; annotations can be added by any registered user of BOLD, and instructions for this are provided.
- Published
- 2015
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4. DNA barcodes for Nearctic Auchenorrhyncha (Insecta: Hemiptera).
- Author
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Foottit RG, Maw E, and Hebert PD
- Subjects
- Animals, DNA, Mitochondrial, Evolution, Molecular, Genes, Insect, Genetic Variation, DNA Barcoding, Taxonomic, Hemiptera classification, Hemiptera genetics
- Abstract
Background: Many studies have shown the suitability of sequence variation in the 5' region of the mitochondrial cytochrome c oxidase I (COI) gene as a DNA barcode for the identification of species in a wide range of animal groups. We examined 471 species in 147 genera of Hemiptera: Auchenorrhyncha drawn from specimens in the Canadian National Collection of Insects to assess the effectiveness of DNA barcoding in this group., Methodology/principal Findings: Analysis of the COI gene revealed less than 2% intra-specific divergence in 93% of the taxa examined, while minimum interspecific distances exceeded 2% in 70% of congeneric species pairs. Although most species are characterized by a distinct sequence cluster, sequences for members of many groups of closely related species either shared sequences or showed close similarity, with 25% of species separated from their nearest neighbor by less than 1%., Conclusions/significance: This study, although preliminary, provides DNA barcodes for about 8% of the species of this hemipteran suborder found in North America north of Mexico. Barcodes can enable the identification of many species of Auchenorrhyncha, but members of some species groups cannot be discriminated. Future use of DNA barcodes in regulatory, pest management, and environmental applications will be possible as the barcode library for Auchenorrhyncha expands to include more species and broader geographic coverage.
- Published
- 2014
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5. Evolution of host specialization in the Adelgidae (Insecta: Hemiptera) inferred from molecular phylogenetics.
- Author
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Havill NP, Foottit RG, and von Dohlen CD
- Subjects
- Animals, Cell Nucleus genetics, Cytochromes b genetics, DNA, Mitochondrial genetics, Electron Transport Complex IV genetics, Hemiptera classification, Hemiptera growth & development, Host-Parasite Interactions, Life Cycle Stages genetics, Molecular Sequence Data, Peptide Elongation Factor 1 genetics, Pinaceae parasitology, Sequence Analysis, DNA, Evolution, Molecular, Hemiptera genetics, Phylogeny
- Abstract
The Adelgidae form a small group of insects in the Aphidoidea. They are cyclically parthenogenetic with host alternating, multiple-generation complex life cycles and are restricted to certain host genera in the Pinaceae. Species that host alternate always have Picea as the primary host where sexual reproduction and gall formation occur, and another genus in the Pinaceae as the secondary host where a series of parthenogenetic generations are produced. Other species that do not host alternate complete their entire life cycle on one host and only reproduce parthenogenetically. We studied relationships within Adelgidae using DNA sequences from the mitochondrial COI, COII, and cytb genes, and the nuclear EF1alpha gene. Analysis of the combined data resulted in a well-resolved phylogeny in which the major adelgid clades correspond neatly to their association with secondary host genera. Specialization on each secondary host genus occurred only once and was followed by diversification on the host genus. Molecular dating of divergence times in the Adelgidae suggest that diversification among host genera occurred in the Late Cretaceous and Early Tertiary when the Pinaceae genera were diverging. It is not clear, however, whether the Adelgidae and Pinaceae co-diversified because the relationships among the Pinaceae genera are not fully resolved. We discuss implications for adelgid taxonomy, life cycle evolution, and evolution of the interaction between adelgids and their host plants.
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- 2007
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6. First record of Adelges (Cholodkovskya) viridanus (Hemiptera: Adelgidae) in North America, with a description of the fundatrix form in Japan.
- Author
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Havill, Nathan P., Shiyake, Shigehiko, Zembrzuski, Deanna, Foottit, Robert G., and Brunet, Bryan M. T.
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HEMIPTERA ,DNA sequencing ,LIFE cycles (Biology) ,LARCHES ,SPECIES - Abstract
Adelges (Cholodkovskya) viridanus (Cholodkovsky 1896) (Hemiptera: Adelgidae) is found throughout Eurasia where it is understood to be anholocyclic, feeding on species of larch (Larix), without host alternation. For the first time, we report this species in North America, outside of its native range, from specimens collected in an arboretum in Ohio, USA. Molecular phylogenetic analysis was inconclusive as to whether it was introduced from Europe or Asia. In addition, specimens collected from Picea jezoensis in Japan were confirmed for the first time as A. (C.) viridanus by matching DNA sequences to specimens collected on Larix. Therefore, A. (C.) viridanus is either capable of completing a host‐alternating holocycle in Japan, or includes very recently diverged anholocyclic populations on Picea. Finally, we describe the adult fundatrix form, which was previously unknown. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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7. Molecular phylogeny and evolution of Calaphidinae (Hemiptera: Aphididae).
- Author
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Lee, Yerim, Kanturski, Mariusz, Foottit, Robert G., Kim, Sora, and Lee, Seunghwan
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MOLECULAR evolution ,APHIDS ,HEMIPTERA ,NATURAL history ,SPECIES diversity - Abstract
Calaphidinae is the second‐largest subfamily in the family Aphididae. Despite their species diversity and some taxonomic controversy, no phylogenetic studies have been conducted on them thus far. Herein, we report the first molecular phylogeny of Calaphidinae and two related lineages, Phyllaphidinae and Saltusaphidinae, based on five genes (3418 bp) for 126 taxa. Maximum parsimony, maximum‐likelihood and Bayesian inference phylogenetic analyses were performed on the multilocus dataset. Divergence time estimation, biogeographical reconstruction, ancestral host plant reconstruction and PhyloType analyses were performed to identify evolutionary trends in Calaphidinae. Our phylogenetic results lead to several conclusions: Phyllaphidinae is a sister group to Calaphidinae s.l.; Calaphidinae is paraphyletic with respect to the former "Saltusaphidinae"; the ingroup clade was subdivided into nine newly recognized lineages; and three subtribes of Calaphidinae (Monaphidina, Calaphdina and Panaphidina) and many genera were not recovered as monophyletic. A new classification is proposed with eight tribal divisions that reflect our phylogenetic results, including three new tribes (Pterocallidini trib.n., Pseudochromaphidini trib.n. and Shivaphidini trib.n.) and three new statuses (Saltusaphidini stat.n., Therioaphidini stat.n. and Myzocallidini stat.n.). The ancestral reconstruction results imply that the ingroup taxa's common ancestor originated in the Eastern Palaearctic and might have fed on Fagaceae in the Late Cretaceous. Later, multiple host shifts and an expanding geographical distribution led to the current species diversity of Calaphidinae. Our reconstructions suggest that species diversification cannot solely be explained by speciation via host shifts and that geographical isolation probably also played a key role. Our results provide new insight into the natural classification and history of the host plant associations and biogeography of Calaphidinae s.l. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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8. Hemiptera of Canada
- Author
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Foottit, Robert, Maw, Eric, Kits, Joel, and Scudder, Geoffrey
- Subjects
Hemiptera ,Barcode Index Number (BIN) ,DNA barcodes ,true bugs ,Biota of Canada ,biodiversity assessment - Abstract
The Canadian Hemiptera (Sternorrhyncha, Auchenorrhyncha, and Heteroptera) fauna is reviewed, which currently comprises 4011 species, including 405 non-native species. DNA barcodes available for Canadian specimens are represented by 3275 BINs. The analysis was based on the most recent checklist of Hemiptera in Canada (Maw et al. 2000) and subsequent collection records, literature records and compilation of DNA barcode data. It is estimated that almost 600 additional species remain to be discovered among Canadian Hemiptera.
- Published
- 2019
9. Species delimitation and invasion history of the balsam woolly adelgid, Adelges (Dreyfusia) piceae (Hemiptera: Aphidoidea: Adelgidae), species complex.
- Author
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Havill, Nathan P., Griffin, Brian P., Andersen, Jeremy C., Foottit, Robert G., Justesen, Mathias J., Caccone, Adalgisa, D'Amico, Vincent, and Elkinton, Joseph S.
- Subjects
PRINCIPAL components analysis ,INTERGLACIALS ,ASEXUAL reproduction ,HEMIPTERA ,FIR ,HYBRID computer simulation - Abstract
The Adelges (Dreyfusia) piceae (Ratzeburg) species complex is a taxonomically unstable group of six species. Three of the species are cyclically parthenogenetic [Ad. nordmannianae (Eckstein), Ad. prelli (Grossmann), and Ad. merkeri (Eichhorn)] and three are obligately asexual [Ad. piceae, Ad. schneideri (Börner), and Ad. nebrodensis (Binazzi & Covassi)]. Some species are high‐impact pests of fir (Abies) trees, so stable species names are needed to communicate effectively about management. Therefore, to refine species delimitation, guided by a reconstruction of their biogeographic history, we genotyped adelgids from Europe, North America, and the Caucasus Mountains region with 19 microsatellite loci, sequenced the COI DNA barcoding region, and compared morphology. Discriminant analysis of principal components of microsatellite genotypes revealed four distinct genetic clusters. Two clusters were morphologically consistent with Ad. nordmannianae. One of these clusters consisted of samples from the Caucasus Mountains and northern Turkey, and the other included samples from this region as well as from Europe and North America, where Ad. nordmannianae is invasive. A third cluster was morphologically consistent with Ad. piceae, and included individuals from Europe, where it is native, and North America, where it is invasive. In North America, the majority of Ad. piceae individuals were assigned to two geographically widespread clones, suggesting multiple introductions. The fourth cluster included individuals morphologically consistent with Ad. prelli or Ad. merkeri. However, based on genetic assignments, hybrid simulations, and approximate Bayesian computation, we find it likely that these are contemporary hybrids between Ad. nordmannianae and Ad. piceae that arose independently in Europe and North America, so we propose that Ad. prelli and Ad. merkeri are invalid. Finally, we synonymise Ad. schneideri(syn.n.) with Ad. nordmannianae and designate Ad. nebrodensis as subspecies Ad. piceae nebrodensis(stat.n.). Our revised taxonomy therefore recognises two species: Ad. nordmannianae and Ad. piceae, which we estimate to have diverged recently, during one of the last two interglacial periods. Finally, we comment on this species complex being in the midst of transition between sexual and asexual reproduction, a pattern that is probably common in Adelgidae. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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10. New data on the aphid (Hemiptera, Aphididae) fauna of New Caledonia: some new biosecurity threats in a biodiversity hotspot.
- Author
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Mille, Christian, Jourdan, Hervé, Cazères, Sylvie, Maw, Eric, and Foottit, Robert
- Subjects
BIOSECURITY ,APHIDS ,HEMIPTERA ,APHIS glycines ,COTTON aphid ,ANIMALS ,PLANT viruses - Abstract
Copyright of ZooKeys is the property of Pensoft Publishers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
11. Genetic and Morphological Diversity in Aphis gossypii Glover (Hemiptera: Aphididae) in the Pacific Basin.
- Author
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Miller, Ross H., Foottit, Robert G., Maw, Eric, and Pike, Keith S.
- Subjects
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COTTON aphid , *APHIDS , *HEMIPTERA , *CYTOCHROME oxidase , *HOST plants , *MULTIVARIATE analysis - Abstract
Aphis gossypii Glover is cosmopolitan pest aphid, known to be represented by host-associated lineages. Although it is widespread in the Pacific Basin, there has been no assessment of this species in this region. We examined patterns of morphological variation within and among populations collected across hosts and islands using multivariate morphometric analyses. Genetic variation was determined using microsatellite flanking region sequences and mitochondrial cytochrome oxidase subunit 1. This study confirmed the existence of genetically distinct host-associated lineages. We found that host plant affects morphological expression and therefore morphological criteria cannot be used to identify lineages. Comments are provided on the origin and maintenance of these host lineages and implications for management of this important pest aphid species. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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12. Cryptic diversity of the subfamily Calaphidinae (Hemiptera: Aphididae) revealed by comprehensive DNA barcoding.
- Author
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Lee, Yerim, Lee, Wonhoon, Kanturski, Mariusz, Foottit, Robert G., Akimoto, Shin-Ichi, and Lee, Seunghwan
- Subjects
HEMIPTERA ,GENETIC barcoding ,INSECT morphology ,INSECT diversity ,CYTOCHROME oxidase - Abstract
Aphids are a species rich group comprising many important pests. However, species identification can be very difficult for aphids due to their morphological ambiguity. DNA barcoding has been widely adopted for rapid and reliable species identification as well as cryptic species detection. In this study, we investigated cryptic diversity in the subfamily Calaphidinae (Hemiptera: Aphididae) based on 899 sequences of cytochrome c oxidase I (COI) for 115 morphospecies (78 species collected in this study and sequences of 73 species downloaded from Genbank). Among these 115 morphospecies, DNA barcoding results of 90 (78.3%) species were identical to results of morphological identification. However, 25 (21.7%) morphospecies showed discrepancies between DNA barcoding and traditional taxonomy. Among these 25 discordances, a total of 15 cryptic species were identified from 12 morphospecies. We also found three morphologically distinct species pairs that sharing DNA barcoding. Based on molecular operational taxonomic unit (MOTU) estimation, we discussed on species delimitation threshold value for these taxa. Our findings confirm that Calaphidinae has high cryptic diversity even though aphids are relatively well-studied. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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13. FIRST AMERICAN RECORDS OF APHIS INTYBI (HEMIPTERA: APHIDIDAE) WITH NOTES ON TWO OTHER RELATED ADVENTIVE SPECIES IN ARGENTINA.
- Author
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MIER DURANTE, M. PILAR, FOOTTIT, ROBERT, VON DOHLEN, CAROL D., and ORTEGO, JAIME
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APHIS , *HEMIPTERA , *APHIDS , *ADVENTIVE plants , *CYTOCHROME oxidase , *HOST plants - Abstract
Aphis intybi Koch is recorded for the first time in North and South America. Measurements for the identification of this species in comparison with Aphis craccivora Koch are given. Aphis cytisorum Hartig is recorded for the third time in Argentina. Data on morphological variation, geographical distribution, and host plants of these species in Argentina are provided. Their morphological identification is supported by comparison of DNA sequences of the mitochondrial cytochrome oxidase subunit 1 (DNA barcode) and subunit 2. [ABSTRACT FROM AUTHOR]
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- 2012
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14. Barcoding Bugs: DNA-Based Identification of the True Bugs (Insecta: Hemiptera: Heteroptera).
- Author
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Doo-Sang Park, Foottit, Robert, Maw, Eric, and Hebert, Paul D. N.
- Subjects
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DNA , *MITOCHONDRIA , *CYTOCHROME oxidase , *HEMIPTERA , *PEST control , *CYTOCHROME c - Abstract
Background: DNA barcoding, the analysis of sequence variation in the 59 region of the mitochondrial cytochrome c oxidase I (COI) gene, has been shown to provide an efficient method for the identification of species in a wide range of animal taxa. In order to assess the effectiveness of barcodes in the discrimination of Heteroptera, we examined 344 species belonging to 178 genera, drawn from specimens in the Canadian National Collection of Insects. Methodology/Principal Findings: Analysis of the COI gene revealed less than 2% intra-specific divergence in 90% of the taxa examined, while minimum interspecific distances exceeded 3% in 77% of congeneric species pairs. Instances where barcodes fail to distinguish species represented clusters of morphologically similar species, except one case of barcode identity between species in different genera. Several instances of deep intraspecific divergence were detected suggesting possible cryptic species. Conclusions/Significance: Although this analysis encompasses 0.8% of the described global fauna, our results indicate that DNA barcodes will aid the identification of Heteroptera. This advance will be useful in pest management, regulatory and environmental applications and will also reveal species that require further taxonomic research. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
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15. Morphometric studies of the genus Sitobion Mordvilko 1914 in Australia (Hemiptera: Aphididae).
- Author
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Hales, Dinah, Foottit, Robert G., and Maw, Eric
- Subjects
- *
APHIDS , *GRASSES , *HEMIPTERA , *LIFE sciences - Abstract
The taxonomic status of several Australian populations within the aphid genus Sitobion has been uncertain for many years. Morphometric investigations using principal component analysis and canonical discriminant analysis have allowed us to clarify the relationships of these entities. A form on grasses, referred to in the literature as Sitobion near fragariae, is shown not to separate morphometrically from S. fragariae (Walker) collected in Europe and North America. In contrast, Sitobion miscanthi (Takahashi) Clones 61 (2n = 20) and 34 (2n = 17) separate unequivocally from each other and from Clone 4 (2n = 18), the supposed ancestral karyotype. We argue against describing these as separate species. Sexual forms of S. miscanthi and Australian S. fragariae reared in the laboratory were compared with the sexual forms of European Sitobion avenae (Fabricius) and S. fragariae, respectively. Australian specimens from Smilax glyciphylla and Smilax australis (Smilacaceae) are not Sitobion smilacifoliae (Takahashi). [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
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16. Biology and Evolution of Adelgidae.
- Author
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Havill, Nathan P. and Foottit, Robert G.
- Subjects
- *
ADELGIDAE , *HEMIPTERA , *INSECT pests , *FOREST ecology , *INSECT behavior , *INSECT-plant relationships , *HOST plants , *LIFE cycles (Biology) - Abstract
The Adelgidae form a small clade of insects within the Aphidoidea (Hemiptera) that includes some of the most destructive introduced pest species threatening North American forest ecosystems. Despite their importance, little is known about their evolutionary history and their taxonomy remains unresolved. Adelgids are cyclically parthenogenetic and exhibit multigeneration complex life cycles. They can be holocyclic, with a sexual generation and host alternation, or anholocyclic, entirely asexual and without host alternation. We discuss adelgid behavior and ecology, emphasizing plant-insect interactions, and we explore ways that the biogeographic history of their host plants may have affected adelgid phylogeny and evolution of adelgid life cycles. Finally, we highlight several areas in which additional research into speciation, population genetics, multitrophic interactions, and life-history evolution would improve our understanding of adelgid biology and evolution. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
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17. Alien true bugs (Hemiptera: Heteroptera) in Canada: composition and adaptations.
- Author
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Scudder, Geoffrey G. E. and Foottit, Robert G.
- Subjects
INSECTS ,HEMIPTERA ,BIOLOGICAL classification ,INSECT pests ,ENTOMOLOGY ,ECOLOGY ,ENVIRONMENTAL sciences - Abstract
Copyright of Canadian Entomologist is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2006
- Full Text
- View/download PDF
18. Review and Key to Aphids (Hemiptera: Aphididae) in Micronesia.
- Author
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Miller, Ross H., Duay, Julie Anne M., Pike, Keith S., Maw, Eric, and Foottit, Robert G.
- Subjects
- *
APHIDS , *ANIMAL species , *SPECIES distribution , *HEMIPTERA , *HOST plants , *PROTHORAX - Abstract
Aphid species from 11 of the major islands of Micronesia ranging from Majuro, Republic of the Marshall Islands, in the east to Koror and Babeldaup, Republic of Palau, in the west, are documented based on 1,691 collections. Other islands sampled included Yap, Kosrae, and Chuuk in the Federated States of Micronesia; Saipan, Tinian, and Rota in the Commonwealth of the Northern Mariana Islands; and the Territory of Guam. Host-plant associations were documented at each collection site. Thirty-five aphid species were collected from 139 plant species in 43 different plant families. None of the aphids collected is indigenous to Micronesia. A key to the identification of the aphid species is provided. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
19. Reconstructing the phylogeny of aphids (Hemiptera: Aphididae) using DNA of the obligate symbiont Buchnera aphidicola.
- Author
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Nováková, Eva, Hypša, Václav, Klein, Joanne, Foottit, Robert G., von Dohlen, Carol D., and Moran, Nancy A.
- Subjects
- *
HEMIPTERA , *INSECT phylogeny , *INSECT physiology , *NUCLEOTIDE sequence , *BIOINFORMATICS , *INSECT genetics - Abstract
Highlights: [•] We proposed and evaluated an alternative approach for generating an aphid phylogeny. [•] We reconstructed phylogenetic relationships within Aphididae based on 255 sequences derived from Buchnera symbionts. [•] We showed that symbiont derived DNA yields informative phylogenetic signal and is a useful source of data. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
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