The anatomy of the body wall and appendages in Arenicola marina L., Arenicola claparedii Levinsen and Arenicola Ecaudata Johnston

@article{Wells1950TheAO,
  title={The anatomy of the body wall and appendages in Arenicola marina L., Arenicola claparedii Levinsen and Arenicola Ecaudata Johnston},
  author={George P. Wells},
  journal={Journal of the Marine Biological Association of the United Kingdom},
  year={1950},
  volume={29},
  pages={1-44}
}
  • G. P. Wells
  • Published 1 April 1950
  • Biology
  • Journal of the Marine Biological Association of the United Kingdom
Worms for dissection, or for museum preservation, should be prepared by the magnesium-formalin method, of which two modifications are given in the text. The body of Arenicola is differentiated into: ( a ) an achaetous ‘head’, comprising the prostomium and a small number (probably two) of subsequent segments, ( b ) a ‘trunk’, composed of a number, varying somewhat with the species, of chaetigerous segments, and ( c ) a ‘ tail ’, which may or may not be chaetigerous according to the species. The… 
The anatomy and physiology of the gut of the polychaete Arenicola marina L
TLDR
The gut of Arenicola marina, is a long straight tube stretching the entire length of the worm, which can be divided into five regions: the proboscis, oesophagus, stomach, intestine, jugular, muscular and glandular regions.
The morphology of the head, thorax, proboscis apparatus and pygidium of the maldanid polychaetes Clymenella torquata and Euclymene oerstedi
TLDR
A system of description is suggested which aims to avoid ambiguity and to eliminate from future maldanid literature the type of confusion which exists in it at present.
The anatomy and histology of the nervous system and excretory system of the maldanid polychaetes Clymenella torquata and Euclymene oestedi
TLDR
The nervous system of the maldanid polychaetes Clymenella torquata and Euclymene oerstedi and Caesicirrus neglectus retains its primitive association with the epidermis and shows only slight metamerism in the presence of larger collections of neurones opposite the parapodia.
Immunohistochemical and ultrastructural analysis of the muscular and nervous systems in the interstitial polychaete Polygordius appendiculatus (Annelida)
TLDR
An investigation of the muscular and nervous systems of Polygordiidae found that a basiepithelial and non-ganglionic organization of the ventral nerve cord as well as an orthogonal nervous system represent plesiomorphic characters.
VARIATION IN ARENICOLA MARINA (L.) AND THE STATUS OF ARENICOLA GLACIALIS MURDOCH (POLYCHAETA)
TLDR
There is evidence that A. marina tends to separate into much smaller local populations with some degree of genetic differentiation, suggesting a genetic condition with manifold effects.
Muscular system in polychaetes (Annelida)
TLDR
An analysis of the diversity of the muscular structure supports the hypothesis that the primary mode of life in polychaetes was epibenthic and the parapodial chaetae had a protective function.
Observations on the burrowing of Arenicola marina (L.).
TLDR
The sequence of muscular contractions and the phases of burrowing are considered and the pressure is utilized at the anterior end of the worm both to aid passage through the sand and to anchor the head while the posterior segments are pulled into the burrow.
The role of oesophageal rhythms in the behaviour of the Arenicola ecaudata Johnston.
TLDR
There is little evidence of a pacemaker role of the oesophagus in ecaudata, and if the movements of the extroverted and body wall are simultaneously recorded, they generally exhibit correlated outbursts of variable and fluctuating pattern, and very unlike the behaviour of the brainless extrovert.
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