Universität zu Köln

Schoenemann, Brigitte (2021). An overview on trilobite eyes and their functioning. Arthropod Struct. Dev., 61. OXFORD: ELSEVIER SCI LTD. ISSN 1873-5495

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Abstract

Great progress has been made during the last decades in understanding visual systems of arthropods living today. Thus it seems worthwhile to review what is known about structure and function of the eyes of trilobites, the most important group of marine arthropods during the Paleozoic. There are three types of compound eyes in trilobites. The oldest and most abundant is the so-called holochroal eye. The sensory system represents a typical apposition eye, and all units are covered by one cornea in common. The so-called abathochroal eye (only in eodiscid trilobites) consists of small lenses, each individually covered by a thin cuticular cornea. The schizochroal eye is represented just in the suborder Phacopina, and probably is a highly specialized visual system. We discuss the calcitic character of trilobite lenses, the phylogenetic relevance of the existence of crystalline cones in trilobites, and consider adaptations of trilobite's compound eyes to different ecological constraints. The aim of this article is to give a resume? of what is known so far about trilobite vision, and to open perspectives to what still might be done. ? 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schoenemann, Brigitte UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-562276
DOI:	10.1016/j.asd.2021.101032
Journal or Publication Title:	Arthropod Struct. Dev.
Volume:	61
Date:	2021
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1873-5495
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COMPOUND EYES; PHACOPID TRILOBITES; SUPERPOSITION EYES; FEEDING-HABITS; EVOLUTION; OPTICS; VISION; LENSES; ORIGIN; SCHIZOCHROAL Multiple languages Entomology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/56227