TY  - THES
AB  - The larvae of all Agromyzidae species (Diptera) are internal feeders of living plant tissue. They can be leaf-miners, stem-miners, seed-parasites and gall-developers among others. Using SEM and light microscopy, the larval stages of Agromyzidae were examined in order to find useful characters for phylogenetic reconstruction of Agromyzidae.
Another aim of this study was the functional interpretation or the larval mouthparts: A considerable morphological difference can be recognised between leaf-miners and dwellers in other plant parts. The first mentioned have generally finer mouthparts and their body is laterally flattened, probably due to their thin, nearly two-dimensional environment within the leaf. In contrast, the more tube-shaped stem-miners have stronger mouthparts, which enable them to deal with tough plant tissue. Seed-feeders and gall-developers have variable mouthparts and a thick, sack-like body shape. Yet also within these outlined feeding types, certain degrees of specialisation and different adaptations to their host plants can be found.
The different phytophagous feeding habits mentioned above, lead to the question, which one can be proposed to be ancestral. Therefore, the phylogenetic reconstruction was used to infer the evolution of plant exploitation in Agromyzidae. Evidence from this approach suggests leaf-mining to be the ancestral feeding habit in Agromyzidae. Alternative feeding habits emerge independently at different times. Furthermore the cladistic reconstruction indicates that stem and seed dwellers are more related to specialised leaf-miners than to more ancient leaf-miners. The significance of leaf-mining as possible first step towards phytophagy is discussed.
DA  - 2001
KW  - Minierfliegen , Phylogenetische Systematik , Insektenlarve , Morphologie (Biologie) , Diptera , Morphologie , Phylogenie , Insecta ,
LA  - ger
PY  - 2001
TI  - Larvalmorphologie und Phylogenie der Agromyzidae (Diptera)
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:361-1626
Y2  - 2024-11-22T05:55:20
ER  -