Biosystematics of Encarsia pergandiella and Encarsia tabacivora : two cryptic species of whitefly parasitoids (Hymenoptera: Aphelinidae) /
addition to differences in coloration, minute morphological
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | addition to differences in coloration, minute morphological and 31 male forewings and 22 measurements on 81 female and 31 and dark form females pupate facing the venter of the based on male forewing and female antenna measurements were College Station the most different. Discriminant functions dark species is most similar to E. pergandiella. differences among the three populations. Canonical differences in male pupal orientation. Three populations differences were noted between the females of both forms. discriminant analyses of these data indicated that males are Females also differed consistently in pupal orientation, Field sampling for whitefly parasitoids in south Texas form population from College Station. Reciprocal mating from College Station revealed that reproductive isolation was However, there was substantial reproductive isolation between including specimens not included when the original functions light form females pupate facing the dorsum of the whitefly male antennae did not reveal any consistent size or shape more readily differentiated morphologically than females. morphologically indistinguishable and there were no not complete and results suggest that it is asymmetrical. of which appeared to be similar to Encarsia pergandiella. In population that occur sympatrically in Weslaco and a dark Principal component analysis of 23 measurements on 45 female reasonably successful at classifying the three forms, revealed two cryptic forms (light and dark) of Encarsia, both similar and the light form from Weslaco and dark form from species from the parvella group of Encarsia indicates that that the two forms are different biological species. The light and dark sympatric forms from Weslaco were the most the light species is most similar to E. tabacivora and the the sympatric light and dark forms from Weslaco indicating trials between the light form from Weslaco and the dark form were constructed. Examination of relevant type material of were examined: a light form population and dark form whitefly. The males of both forms appeared to be |
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| Item Description: | "Major subject: Entomology". Vita. |
| Physical Description: | xii, 109 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |