A functional analysis of compound eye evolution.
Författare
Summary, in English
New data on the phylogenetic relationships of various arthropod groups have spurred interesting attempts to reconstruct the evolution of arthropod
nervous and visual systems. Some of the relevant new data are cell identities and developmental processes in the nervous and sensory
systems, which is particularly useful for reconstructing the evolution of these systems. Here, we focus on the structure of compound eye ommatidia,
and make an evolutionary analysis with functional arguments. We investigate possible routes of evolution that can be understood in
terms of selection for improved visual function, and arrive at a number of conclusions that are discussed in the light of recent phylogenetic
hypotheses. On the basis of ommatidial focusing structures and the arrangement of receptor cells we show that the evolution of compound
eyes proceeded largely independently along at least two lineages from very primitive ancestors. A common ancestor of insects and crustaceans
is likely to have had ommatidia with focusing crystalline cones, and colour and/or polarization vision. In contrast, the compound eyes in myriapods
and chelicerates are likely to date back to ancestors with corneal lenses and probably without the ability to discriminate colour and
polarization.
nervous and visual systems. Some of the relevant new data are cell identities and developmental processes in the nervous and sensory
systems, which is particularly useful for reconstructing the evolution of these systems. Here, we focus on the structure of compound eye ommatidia,
and make an evolutionary analysis with functional arguments. We investigate possible routes of evolution that can be understood in
terms of selection for improved visual function, and arrive at a number of conclusions that are discussed in the light of recent phylogenetic
hypotheses. On the basis of ommatidial focusing structures and the arrangement of receptor cells we show that the evolution of compound
eyes proceeded largely independently along at least two lineages from very primitive ancestors. A common ancestor of insects and crustaceans
is likely to have had ommatidia with focusing crystalline cones, and colour and/or polarization vision. In contrast, the compound eyes in myriapods
and chelicerates are likely to date back to ancestors with corneal lenses and probably without the ability to discriminate colour and
polarization.
Avdelning/ar
Publiceringsår
2007
Språk
Engelska
Sidor
373-385
Publikation/Tidskrift/Serie
Arthropod Structure & Development
Volym
36
Issue
4
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Zoology
Nyckelord
- Compound eye
- Evolution
- Ommatidia
Status
Published
Forskningsgrupp
- Lund Vision Group
ISBN/ISSN/Övrigt
- ISSN: 1467-8039