Whole-body photoreceptor networks are independent of ‘lenses’ in brittle stars
Whole-body photoreceptor networks are independent of ‘lenses’ in brittle stars
复制标题
全身感光网络独立于海蛇尾的晶状体
DOI:
10.1098/rspb.2017.2590
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Ullrich-Lüter
中科院分区:
文献类型:
--
作者:
Sumner-Rooney;Rahman;Sigwart;J. D. ;Ullrich-Lüter
Photoreception and vision are fundamental aspects of animal sensory biology and ecology, but important gaps remain in our understanding of these processes in many species. The colour-changing brittle starOphiocoma wendtiiis iconic in vision research, speculatively possessing a unique whole-body visual system that incorporates information from nerve bundles underlying thousands of crystalline ‘microlenses’. The hypothesis that these might form a sophisticated compound eye-like system regulated by chromatophores has been extensively reiterated, with investigations into biomimetic optics and similar supposedly ‘visual’ structures in living and fossil taxa. However, no photoreceptors or visual behaviours have ever been identified. We present the first evidence of photoreceptor networks in threeOphiocomaspecies, both with and without microlenses and colour-changing behaviour. High-resolution microscopy, immunohistochemistry and synchrotron tomography demonstrate that putative photoreceptors cover the animals' oral, lateral and aboral surfaces, but are absent at the hypothesized focal points of the microlenses. The structural optics of these crystal ‘lenses’ are an exaptation and do not fulfil any apparent visual role. This contradicts previous studies, yet the photoreceptor network inOphiocomaappears even more widespread than previously anticipated, both taxonomically and anatomically.
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DOI:
10.1201/9780203970881.ch56
发表时间:
2004
期刊:
Annals of oncology : official journal of the European Society for Medical Oncology
影响因子:
--
作者:
G. Hendler
通讯作者:
G. Hendler
DOI:
10.1016/0022-0981(86)90100-0
发表时间:
1986-12-31
影响因子:
2
作者:
MOORE, A;COBB, JLS
通讯作者:
COBB, JLS
影响因子:
2.8
作者:
Petie R;Garm A;Hall MR
通讯作者:
Hall MR
影响因子:
3.6
作者:
P. Whitfield;R. Emson
通讯作者:
R. Emson
影响因子:
9.2
作者:
D. I. Speiser;D. Eernisse;S. Johnsen
通讯作者:
S. Johnsen