Cited by 129Marine Invertebrate Physiology and EcologyGenetic and Kidney Cyst DiseasesMarine Biology and Ecology Research

Cilia and the life of ctenophores

Tamm, Sidney L.·2014·Invertebrate Biology

Abstract

Abstract Ctenophores, or comb jellies, are a distinct phylum of marine zooplankton with eight meridional rows of giant locomotory comb plates. Comb plates are the largest ciliary structures known, and provide unique experimental advantages for investigating the biology of cilia. Here, I review published and unpublished work on how ctenophores exploit both motile and sensory functions of cilia for much of their behavior. The long‐standing problem of ciliary coordination has been elucidated by experiments on a variety of ctenophores. The statocyst of ctenophores is an example of how mechanosensory properties of motile cilia orient animals to the direction of gravity. Excitation or inhibition of comb row beating provides adaptive locomotory responses, and global reversal of beat direction causes escape swimming. The diverse types of prey and feeding mechanisms of ctenophores are related to radiation in body form and morphology. The cydippid Pleurobrachia catches copepods on tentacles and undergoes unilateral ciliary reversal to sweep prey into its mouth. Mnemiopsis uses broad muscular lobes and ciliated auricles to capture and ingest prey. Beroë has giant smooth muscles and toothed macrocilia to rapidly engulf or bite through ctenophore prey, and uses reversible tissue adhesion to keep its mouth closed while swimming. Ciliary motor responses are calcium‐dependent, triggered by voltage‐activated calcium channels located along the length (reversed beating) or at the base (activation of beating) of ciliary membranes. Ciliary and muscular responses to stimuli are regulated by epithelial and mesogleal nerve nets with ultrastructurally identifiable synapses onto effector cells. Post‐embryonic patterns of comb row development in larval and adult stages are described and compared with regeneration of comb plates after surgical removal. Truly, cilia and ctenophores, like love and marriage, go together like a horse and carriage.

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Crossref · 10.1111/ivb.12042

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Authors
Tamm, S. L.
Affiliations
Boston University (US)
Corresponding author
Tamm, Sidney L.
Venue
Invertebrate Biology
Publisher
Wiley
Published
2014-01-15
Volume
133
Issue
1
Pages
1-46
ISSN
  • 1077-8306 (ISSN-L)
  • 1744-7410
OpenAlex
W2060610706
Cited by
129
References
143
Citations by year
2026: 8 · 2025: 21 · 2024: 15 · 2023: 20 · 2022: 11 · 2021: 7 · 2020: 4 · 2019: 13 · 2018: 5 · 2017: 5 · 2016: 6 · 2015: 8 · 2014: 6
FWCI
6.07
Type
journal article
Language
en
Open access
closed
Locations
Invertebrate Biology (publishedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Biology and Ecology Research
Keywords
ctenophores, cilia, ciliary coordination, statocyst, mechanosensing, ciliary reversal, escape swimming, feeding mechanism, Mnemiopsis, Beroe, calcium channels, nerve net, marine zooplankton

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