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Cited by 20Marine Invertebrate Physiology and EcologyComparative Animal Anatomy StudiesCardiomyopathy and Myosin Studies

A New Type of Muscle Cell from the Subumbrella of Obelia

Chapman, David M.·1968·Journal of the Marine Biological Association of the United Kingdom
DOI 10.1017/s0025315400019226
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Abstract

The subumbrella of the hydrozoan medusa Obelia consists of three layers of cells. The innermost layer is the endodermal lamella whose broad polygonal cells are in close contact with the middle layer of polygonal myocytes which have striated myofibrils running in two layers at right angles to one another in the same cell. These myofibrils extend beyond the myocytes as plasma membrane-enclosed prongs to make contact with the prongs of neighbouring cells in such a way that whole mounts give the impression that the slender myofibrils are continuous over the subumbrella. Cross-layered myocytes can be seen to be another means of decreasing the surface area of the subumbrella, a condition necessary for medusoid locomotion. Helically banded radial myofibrils are found in the outer layer.

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Registry

Crossref · 10.1017/s0025315400019226

Cites

23 of 23 references verified0 citation errors · 0 not checkable

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  • In Leptomedusa and a few Anthomedusa, striated muscle is completely covered by flagellated smooth muscle epithelia.

    “In the Leptomedusa(Chapman, 1968) and few Anthomedusa(Hyman, 1940) the striated muscle (red) is completely covered (A, A1) by flagellated smooth muscle epithelia (green)”

    From Evolution of striated muscle: Jellyfish and the origin of triploblasty (2005) · cites this paper as Chapman, 1968

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Related

Authors
Chapman, D. M.
Affiliations
Dalhousie University (CA)
Corresponding author
Chapman, David M.
ORCID
Chapman, David M.
Venue
Journal of the Marine Biological Association of the United Kingdom
Publisher
Cambridge University Press (CUP)
Published
1968-10
Volume
48
Issue
3
Pages
667-688
ISSN
  • 0025-3154 (ISSN-L)
  • 1469-7769
DOI
10.1017/s0025315400019226
OpenAlex
W2108790650
Cited by
20
References
23
Citations by year
2018: 1 · 2017: 1 · 2014: 1
FWCI
0.00
Type
journal article
Language
en
Open access
closed
Licence
www.cambridge.org/core/terms (unspecified, 14832 d)
Locations
Journal of the Marine Biological Association of the United Kingdom (publishedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
  • Health Sciences › Medicine › Urology › Comparative Animal Anatomy Studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiomyopathy and Myosin Studies
Keywords
Obelia, muscle cells, myofibrils, cell ultrastructure

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