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Classification of amphipod compound eyes- the fine structure of the ommatidial units (Crustacea, Amphipoda)

Author:
  • Eric Hallberg
  • Heimo Nilsson
  • Rolf Elofsson
Publishing year: 1980
Language: English
Pages: 279-306
Publication/Series: Zoomorphology
Volume: 94
Document type: Journal article

Abstract english

The ultrastructure of the compound eyes of 13 amphipod species has been investigated. An amphipod type of compound eye can be characterized by the constellation and consistency of a number of morphological features, most of which are also found in other compound eyes. The amphipod eye falls into four sub-categories (types). The ampeliscid type has a tripartite aberrant lens eye; the lysianassid type has a reduced or no dioptric apparatus and a hypertrophied rhabdom; the hyperid type possesses a large number of ommatidial units with long crystalline cones and dark instead of reflecting accessory pigment; and finally, the gammarid type can be interpreted as a generalized amphipod type. The lysianassid type is adapted to low light intensities and demonstrates convergent development with the compound eyes of other deep-sea crustaceans. The ampeliscid type is more similar to the gammarid type. The type characterization of the amphipod compound eye might well serve as a basis and incentive for functional studies also revealing adaptational mechanisms.

Keywords

  • Zoology

Other

Published
Eric Hallberg
E-mail: eric [dot] hallberg [at] biol [dot] lu [dot] se

Professor emeritus

Functional zoology

+46 46 222 46 78

B-B325

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