AMERICAN SPECIES OF <i>DIORYCTRIA</i> (LEPIDOPTERA: PYRALIDAE): IV. THE <i>SCHUETZEELLA</i> GROUP AND THE TAXONOMIC STATUS OF THE SPRUCE CONE MOTH

Mutuura, Akira; Munroe, Eugene

doi:10.4039/ent105653-4

Cited by 8 publications

(11 citation statements)

References 6 publications

(9 reference statements)

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“…In the present study, three independent molecular loci, morphometric characters, and larval host association were examined to provide a test of the genomic integrity of two North American taxa. Historically, Dioryctria reniculelloides, a larger, darker, primarily eastern species, was considered distinct from Dioryctria pseudotsugella, which is smaller, paler, and western (Munroe 1959; Mutuura & Munroe 1973; Neunzig 2003). Based on the original descriptions, North American members of clades 3‐1 and 3‐2 corresponded to D. reniculelloides and D. pseudotsugella , respectively.…”

Section: Discussionmentioning

confidence: 99%

“…The hybrid index only achieved moderate success as a method of assignment when morphometric characters alone were used (Table 8). Larval host plant associations were considered an important diagnostic character for D. reniculelloides and D. pseudotsugella in the original descriptions (Munroe 1959; Mutuura & Munroe 1973; Neunzig 2003). When larval host plant was included as a variable in the hybrid index, the identification accuracy increased by as much as 30% (Table 8).…”

Section: Discussionmentioning

confidence: 99%

“…Four forewing characters were scored to quantify morphological variation among specimens. Measurements were chosen to correspond with diagnostic forewing characters used in the original species descriptions (Munroe 1959; Mutuura & Munroe 1973; Neunzig 2003). Maximum forewing length (Length), ground colour of the entire forewing (ADS), area of pinkish‐orange subbasal patch (ASBA), and modal grayscale scale colour in the sub‐basal patch (Mode) were measured for each individual (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…This species also feeds on needles, primarily of P. menziesii and Abies species. Based on their original descriptions, D. reniculelloides and D. pseudotsugella are separated primarily by geographic distribution, larval host plant, and minor forewing characteristics, such as wing length, overall colour, and the colour and size of a sub‐basal wing scale patch (Munroe 1959; Mutuura & Munroe 1973; Neunzig 2003). A more recent report suggests that intermediate morphological forms and shared larval host records are common between these putative taxa (Sopow et al .…”

Section: Introductionmentioning

confidence: 99%

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Population structure and species boundary delimitation of cryptic Dioryctria moths: an integrative approach

2007

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Accurate delimitation of species boundaries is especially important in cryptic taxa where one or more character sources are uninformative or are in conflict. Rather than relying on a single marker to delimit species, integrative taxonomy uses multiple lines of evidence such as molecular, morphological, behavioural and geographic characters to test species limits. We examine the effectiveness of this approach by testing the delimitation of two cryptic Nearctic species of Dioryctria (Lepidoptera: Pyralidae) using three independent molecular markers [cytochrome c oxidase I (COI), second internal transcribed spacer unit (ITS2), and elongation factor 1alpha (EF1alpha)], forewing variation and larval host plant association. Although mitochondrial DNA (mtDNA) haplotypes do not form reciprocally monophyletic clades, restricted gene flow between COI haplotype groups, and concordance with ITS2 genotypes, forewing variation and host plant associations support delimitation of two Nearctic species: eastern Dioryctria reniculelloides and western Dioryctria pseudotsugella. Conversely, EF1alpha genotype variation was incongruent with the two previous markers. A case of discordance between COI and ITS2 was detected, suggesting either introgression due to hybridization or retained ancestral polymorphism due to incomplete coalescence. This study is consistent with other similar literature where molecular loci in closely related species progress from shared to fixed haplotypes/alleles, and from polyphyletic to reciprocally monophyletic relationships, although loci may vary in these characteristics despite maintenance of genomic integrity between distinct species. In particular, mtDNA in other studies generally showed a lower rate of fixation of differences than did X-linked or autosomal loci, reinforcing the need to use an integrative approach for delimiting species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Population structure and species boundary delimitation of cryptic Dioryctria moths: an integrative approach

2007

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“…Blanchard and Knudson 1983;Hedlin et al 1980;Neunzig 2003;pygmaeella Bald cypress Pondcypress, Taxodium ascendens Brongn. Heinrich 1956;Hedlin et al 1980;Neunzig 2003 ;Heinrich 1956;Munroe 1959;McLeod and Daviault 1963;Prentice 1965;Mutuura and Munroe 1973;Hedlin et al 1980;Neunzig 2003 Table 1 (continued).…”

Section: Conesmentioning

confidence: 99%

Biology and management of North American cone-feedingDioryctriaspecies

et al. 2011

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Coneworms, Dioryctria Zeller (Lepidoptera: Pyralidae), are destructive pests of conifers across North America, and members of several different species groups present significant pest-management challenges in conifer seed orchards. Dioryctria abietivorella Grote (abietella group) is the most pestiferous Dioryctria species in Canada. Despite this status, control tactics are currently limited to broad-spectrum pesticides that threaten non-target species and may result in pesticide resistance. The development of integrated pest management programs targeting Dioryctria species will benefit from a conceptual framework on which to base future research. To create this structure, we review the systematics, evolutionary ecology, and management of cone-feeding North American Dioryctria species. Current research suggests that many species boundaries are in need of further revision. Major gaps in our understanding of Dioryctria ecology impede the development of integrated pest management tactics. For example, host-generated semiochemicals are important in Dioryctria reproduction, although the uses of these cues in host-finding and host acceptance remain unknown. Future research should identify factors that mediate population distribution at landscape (e.g., migration), local (e.g., feeding stimulants), and temporal (e.g., development thresholds) scales.

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Geographic Invasion and Abundance as Facilitated by Differential Host Plant Utilization Abilities

Scriber

Hainze

1987

Insect Outbreaks

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AMERICAN SPECIES OF DIORYCTRIA (LEPIDOPTERA: PYRALIDAE): IV. THE SCHUETZEELLA GROUP AND THE TAXONOMIC STATUS OF THE SPRUCE CONE MOTH

Cited by 8 publications

References 6 publications

Population structure and species boundary delimitation of cryptic Dioryctria moths: an integrative approach

Population structure and species boundary delimitation of cryptic Dioryctria moths: an integrative approach

Biology and management of North American cone-feedingDioryctriaspecies

Geographic Invasion and Abundance as Facilitated by Differential Host Plant Utilization Abilities

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