近緣種之多食性潛蠅形態進化與系統學研究
Date Issued
2002
Date
2002
Author(s)
DOI
902313B002334
Abstract
Liriomyza leafminers is a pest group that causes not only the considerable economic losses but also the serious quarantine problems. Due to the increased volume of international trade of agricultural products and the morphological similarities of the closely related species in this pest group, efficient and accurate pest species recognition on imported or exported crops becomes more and more important; and this is probably the only way to prevent them from outspreading by human-mediated dispersal. Therefore, morphological studies were performed to assist species identification and discrimination of six Liriomyza pest species of quarantine importance, which include L. brassicae, L. bryoniae, L. chinensis, L. huidobrensis, L. sativae, and L. trifolii. Some traditional morphological characters, such as abdominal color patterns and male genitalia were re-evaluated for their discriminative ability. Besides, the electronmicrography and geometric morphometric methods were introduced to use in separating different species. Illustrative plates of the preceding morphology were collected into mappings for further applications in quarantine inspection; some analyses and evaluations in separating similar species were also discussed in further detail. The results show that the abdominal color patterns can only separate two species from others; nevertheless, the ultra-structure of thoracic microsetae and male genitalia are useful morphological characters to prevent
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misidentifications. Thoracic microsetae show their unique arrangement and pattern on each species both in length and in density; meanwhile, the photography of male genitalia, which have larger focal depth, was also proven taxonomically valuable in practice. Although not all pairs between any two species have significant differences in wing shapes, wing morphometric results do reveal that the most variant area of wing shape is located around the cross veins; this suggests that the morphology on this area might be used easily and efficiently in dividing different species.
Subjects
Morphometrics
Systematics
Agromyzidae
Diptera
Publisher
臺北市：國立臺灣大學昆蟲學系暨研究所
Type
report
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