Advanced

The circulatory system and a new cell type of the cephalocarid crustacean Hutchinsoniella macracantha

Hessler, Robert R and Elofsson, Rolf LU (2001) In Journal of Crustacean Biology 21. p.28-48
Abstract
The circulatory system of Hutchinsoniella macracantha consists of a tubular heart in thoracic segments 1–6, a dorsoposterior channel, and body fluid (“haemocoelic”) sinuses. The heart, which is possibly closed anteriorly, has three paired ostia dorsolaterally in thoracic segments 2–4. The heart wall is formed by two cellular layers: an inner myocardium and an outer epicardium. The myofibrils are oriented in various directions within the cells. Hutchinsoniella differs from all other crustaceans by lacking a tubule system in the myocardium. The connections between the myocardial cells, called intercalated discs, also differ from those of other crustaceans. The construction of the dorsoposterior channel is unlike that of a typical blood... (More)
The circulatory system of Hutchinsoniella macracantha consists of a tubular heart in thoracic segments 1–6, a dorsoposterior channel, and body fluid (“haemocoelic”) sinuses. The heart, which is possibly closed anteriorly, has three paired ostia dorsolaterally in thoracic segments 2–4. The heart wall is formed by two cellular layers: an inner myocardium and an outer epicardium. The myofibrils are oriented in various directions within the cells. Hutchinsoniella differs from all other crustaceans by lacking a tubule system in the myocardium. The connections between the myocardial cells, called intercalated discs, also differ from those of other crustaceans. The construction of the dorsoposterior channel is unlike that of a typical blood vessel. The body space is organized into a dorsal and ventral haemocoel separated by a thick, cellular, multifunctional, horizontal septum. There is no dedicated pericardial septum. Additional septa and openings between the body cavities channel the circulation of haemocoelic fluid. Resting on the horizontal septum and filling the space between the intestine and the dorsal longitudinal muscles are large cells, here called balloon cells, with few organelles and an otherwise undetermined cytoplasmic content. The function of this new cell type remains obscure. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Crustacean Biology
volume
21
pages
28 - 48
publisher
Crustacean Soc.
ISSN
0278-0372
DOI
10.1163/20021975-99990107
language
English
LU publication?
yes
id
a58008d9-1514-4732-9f0e-3fcc5cb5b6ee
date added to LUP
2016-10-28 21:49:39
date last changed
2018-05-29 11:25:44
@article{a58008d9-1514-4732-9f0e-3fcc5cb5b6ee,
  abstract     = {The circulatory system of Hutchinsoniella macracantha consists of a tubular heart in thoracic segments 1–6, a dorsoposterior channel, and body fluid (“haemocoelic”) sinuses. The heart, which is possibly closed anteriorly, has three paired ostia dorsolaterally in thoracic segments 2–4. The heart wall is formed by two cellular layers: an inner myocardium and an outer epicardium. The myofibrils are oriented in various directions within the cells. Hutchinsoniella differs from all other crustaceans by lacking a tubule system in the myocardium. The connections between the myocardial cells, called intercalated discs, also differ from those of other crustaceans. The construction of the dorsoposterior channel is unlike that of a typical blood vessel. The body space is organized into a dorsal and ventral haemocoel separated by a thick, cellular, multifunctional, horizontal septum. There is no dedicated pericardial septum. Additional septa and openings between the body cavities channel the circulation of haemocoelic fluid. Resting on the horizontal septum and filling the space between the intestine and the dorsal longitudinal muscles are large cells, here called balloon cells, with few organelles and an otherwise undetermined cytoplasmic content. The function of this new cell type remains obscure. },
  author       = {Hessler, Robert R and Elofsson, Rolf},
  issn         = {0278-0372},
  language     = {eng},
  pages        = {28--48},
  publisher    = {Crustacean Soc.},
  series       = {Journal of Crustacean Biology},
  title        = {The circulatory system and a new cell type of the cephalocarid crustacean Hutchinsoniella macracantha},
  url          = {http://dx.doi.org/10.1163/20021975-99990107},
  volume       = {21},
  year         = {2001},
}