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Photoreceptors with mitochondrial lenses inPogaina suecica (Plathelminthes, Rhabdocoela)

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Summary

The photoreceptors ofPogaina suecica correspond to the type of pigment cup ocelli. Each eye consists of one cup cell and three sensory cells. The most conspicuous differentiations of these eyes are lens elements formed by giant mitochondria densely filled with homogeneous electron-dense material. From electron microscopical findings available to date it is hypothesized that mitochondrial lensing might be an autapomorphy of a taxon comprising the Provorticidae Kirgisellinae, Dalyelliidae and Graffillidae groups which are ascribed to the paraphyletic “Dalyellioida”.

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Abbreviations

l 1–3 :

lenses

npc :

nucleus of the pigment cell

pc :

pigment cell

pg :

pigment granule

rh :

rhabdomeres

sc 1–3 :

sensory cells

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  1. II. Zoologisches Institut und Museum der Universität Göttingen, Berliner Strasse 28, W-3400, Göttingen, Germany

    Beate Sopott-Ehlers

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  1. Beate Sopott-Ehlers
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Sopott-Ehlers, B. Photoreceptors with mitochondrial lenses inPogaina suecica (Plathelminthes, Rhabdocoela). Zoomorphology 112, 11–15 (1992). https://doi.org/10.1007/BF01632990

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  • DOI: https://doi.org/10.1007/BF01632990

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