Skip to main content Accessibility help
×
Home

Morphology and function of the mandibular muscles in some coleoid cephalopods

  • Amanda J. Kear (a1)

Abstract

The functional morphology of the buccal mass of 23 species of cephalopod (Octopoda, 4 species; Teuthoidea, 17; Sepioidea, 2) was investigated by gross dissection, histology and observations on fresh preparations. Cephalopod beaks lack a joint or articulation point. The jaws slide and rotate around an area rather than a fixed point. During closing the superior mandibular muscle (SMM) provides the force of a bite and the largest movement vector, whilst the inferior mandibular muscle (IMM) acts to retract the upper beak, causing shearing action. Dorsal portions of the lateral mandibular muscles (LMM) flex the upper beak walls outwards, probably to accommodate the backwards sweep of the radula and buccal palps during closing. To open the beaks, the ventral portions of the lateral mandibular muscles pull the rear lateral walls of the two beaks towards each other, moving the lower beak back relative to the upper.

Copyright

References

Hide All
Andrews, P.L.R. & Tansey, E.M., 1983. The digestive tract of Octopus vulgaris: the anatomy, physiology and pharmacology of the upper tract. Journal of the Marine Biological Association of the United Kingdom, 63, 109134.
Bidder, A.M., 1950. The digestive mechanism of the European squids Loligo vulgaris, Loligo forbesi. Alloteuthis media, and Alloteuthis subulata . Quarterly Journal of Microscopical Science, 91, 143.
Boyle, P.R., Mangold, K. & Froesch, D., 1979a. The mandibular movements of Octopus vulgaris . Journal of Zoology, 188, 5367.
Boyle, P.R., Mangold, K. & Froesch, D., 1979b. The organisation of beak movements in Octopus . Malacologia, 18, 423430.
Bradbury, H.E. & Aldrich, F.A., 1969. Observations on feeding of the squid lllex illecebrosus illecebrosus (Lesueur, 1821) in captivity. Canadian Journal of Zoology, 47, 913915.
Brown, E.R., Bone, Q., Ryan, K.P. & Abbott, N.J., 1991. Morphology and electrical properties of Schwann cells around the giant axon of the squids Loligo forbesi and Loligo vulgaris . Proceedings of the Royal Society (B), 243, 255262.
Clarke, M.R., 1962. The identification of cephalopod ‘beaks’ and the relationship between beak size and total body weight. Bulletin of the British Museum (Natural History) (Zoology), 8, 421480.
Clarke, M.R., 1986. A handbook for the identification of cephalopod beaks. Oxford: Clarendon Press.
Dilly, P.N. & Nixon, M., 1976. The cells that secrete the beaks in octopods and squids (Mollusca, Cephalopoda). Cell and Tissue Research, 167, 229241.
Duval, P., Chichery, M.-P. & Chichery, R., 1984. Prey capture by the cuttlefish (Sepia officinalis): an experimental study of two strategies. Behavioural Processes, 9, 1321.
Gabe, M. & Prenant, M., 1957. Recherches sur la gaine radulaire des Mollusques. VI. L'appareil radulaire de quelques Cephalopodes. Annales des Sciences Naturelles (Zoologie), Paris, Series 11, 19, 587602.
Heinrich, H., 1904. Uber den Schlundkopf einiger dibranchiaten Cephalopoden. Zeitschrift für Naturwissenschaften, 77, 140.
Hirtle, R., 1978. Observations on feeding and grooming behaviour of captive squid lllex illecebrosus (Lesueur 1821). Technical Report. Fisheries and Marine Service, Canada, 833, 13.1–13.5.
Kier, W.M., 1982. The functional morphology of the musculature of squid (Loliginidae) arms and tentacles. Journal of Morphology, 172, 179192.
Lauder, G.V., 1983. Food capture. In Fish biomechanics (ed. Webb, P.W. and Weihs, D.), pp. 280311. New York: Praeger Publishers.
Messenger, J.B., Nixon, M. & Ryan, K.P., 1985. Magnesium chloride as an anaesthetic for cephalopods. Comparative Biochemistry and Physiology, 82C, 203205.
Morton, N. & Nixon, M., 1987. Size and function of ammonite aptychi in comparison with buccal masses of modern cephalopods. Lethaia, 20, 231238.
Nesis, K.N., 1987. Cephalopods of the world. New Jersey: TFH Publications Inc.
Nixon, M., 1968. Feeding mechanism and growth in Octopus vulgaris. PhD thesis, University of London.
Nixon, M., 1979. Hole-boring in shells by Octopus vulgaris Cuvier in the Mediterranean. Malacologia, 18, 431443.
Nixon, M., 1985. Capture of prey, diet and feeding of Sepia officinalis and Octopus vulgaris (Mollusca: Cephalopoda) from hatching to adult. Vie et Milieu, 35, 255261.
Nixon, M., 1988a. The buccal mass of fossil and Recent Cephalopoda. In The Mollusca. Vol. 12. Palaeontology and neontology of cephalopods (ed. Clarke, M.R. and Trueman, E.R.), pp. 103122. London: Academic Press.
Nixon, M., 1988b. The feeding mechanisms and diets of cephalopods – living and fossil. In Cephalopods – present and past (ed. Wiedmann, J. and Kullmann, J.), pp. 641652. Stuttgart: Schweizerbart'sche Verlagsbuchhandlung.
Nixon, M. & Dilly, P.N., 1977. Sucker surfaces and prey capture. Symposia of the Zoological Society of London, 38, 447511.
Snedecor, G.W. & Cochran, W.G., 1980. Statistical methods (7th ed.). Iowa State UP.
Tanabe, K. & Fukuda, Y., 1987. Mouth part histology and morphology. In Nautilus: the biology and palaeobiology of a living fossil (ed. Saunders, W.B. and Landman, N.H.), pp. 313322. New York: Plenum Press.
Williams, L.W., 1909. The anatomy of the common squid, Loligo pealii, Lesueur . New York: American Museum of Natural History Press.
Young, J.Z., 1965a. The buccal nervous system of Octopus . Philosophical Transactions of the Royal Society of London (B), 249, 2743.
Young, J.Z., 1965b. The nervous pathways for poisoning, eating and learning in Octopus . Journal of Experimental Biology, 43, 581593.
Young, J.Z., 1971. The anatomy of the nervous system of Octopus vulgaris. Oxford: Clarendon Press.
Young, R.E., 1964. The anatomy of the vampire squid. MSc thesis, University of Southern California.

Morphology and function of the mandibular muscles in some coleoid cephalopods

  • Amanda J. Kear (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed