Micromorphology and Ultrastructure of the Foot of the Equilateral Venus Gomphina veneriformis (Bivalvia: Veneridae)


The shape and microscopic structure of the foot of the equilateral Venus, Gomphina veneriformis are described by light and electron microscopy along with the substrate conditions of their habitat. The habitat sediment of G. veneriformis is composed of sand (2 - 0.063 mm in diameter), mainly. The foot is wedge-shaped with multiple vertical furrows on the surface. Although the foot is composed of an epithelial layer, a connective tissue layer and a muscular layer, the boundary between the connective tissue and muscular layer is not clear. The epithelial layer was composed mostly of ciliated columnar epithelia and secretory cells. Epithelial cells forming the apical region of the fold were long columnar, while cells of the interfold were mostly short columnar. The cilia and microvilli were commonly observed on the free surface of epithelial cells, while tight junctions of apico-lateral aspect and membrane interdigitations were found between the epithelial cells. Secretory cells were found to contain acidic mucopolysaccharide, and were classified into two types in accordance with the shapes and ultrastructures of secretory granules. The muscle fibers were composed of thin and thick microfilaments, the proportions of which were 81.3% and 18.7%, respectively. It was determined that such morphology and structural characteristics of the foot of G. veneriformis would present advantageous conditions for borrowing into substrate and mobility.

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J. Park, J. Lee, Y. Lee and J. Kim, "Micromorphology and Ultrastructure of the Foot of the Equilateral Venus Gomphina veneriformis (Bivalvia: Veneridae)," CellBio, Vol. 1 No. 1, 2012, pp. 11-16. doi: 10.4236/cellbio.2012.11002.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] E. Gosling, “Bivalve Molluscs: Biology, Ecology and Culture,” Blackwell Science, Oxford, 2004.
[2] A. F. Eble, “Anatomy and Histology of Mercenaria mercenaria,” In: J. N. Kraeuter and M. Castagna, Eds., Biology of the Hard Clam, Elsevier, New York, 2001, pp. 117-220.
[3] J. Machin, “Role of Integument in Molluscs,” In: B. L. Gupta, R. B. Moreton, J. L. Oschman and B. J. Wall, Eds., Transport of Ions and Water in Animals, Academic Press, New York, 1977, pp. 735-762.
[4] J. S. Lee, “Ultrastructure of the Mantle Epidermis in the Ark Shell Scapharca broughtonii (Bivalvia: Arcidae),” Korean Journal of Electron Microscopy, Vol. 32, 2002, pp. 213-222.
[5] S. M. Ju, J. W. Lee, Y. G. Jin, J. Yu and J. S. Lee, “Effect of Zinc Bioaccumulation on Survival Rate, Activity, Growth and Organ Structure of the Equilateral Venus, Gomphina veneriformis (Bivalvia: Veneridae),” Journal of Environmental Toxicology, Vol. 21, 2006, pp. 115-126.
[6] J. S. Lee, J. Y. Joo and J. J. Park, “Histology and Ultrastructure of the mantle epidermis of Gomphina veneriformis (Bivalvia: Veneridae),” Journal of Shellfish Research, Vol. 26, No. 2, 2007, pp. 413-421. doi:10.2983/0730-8000(2007)26[413:HAUOTM]2.0.CO;2
[7] L. Vitellaro-Zuccarello, “Ultrastructural and Cytochemical Study on the Enzyme Gland of the Foot of a Mollusk,” Tissue and Cell, Vol. 13, No. 4, 1981, pp. 701-713. doi:10.1016/S0040-8166(81)80007-9
[8] J. L. Norenburg and J. D. Ferraris, “Cytomorphology of the Pedal Aperture Glands of Mya arenaria L. (Mollusca, Bivalvia),” Canadian Journal of Zoology, Vol. 68, No. 6, 1990, pp. 1137-1144. doi:10.1139/z90-169
[9] A. Garcia-Gasca, R. I. Ochoa-Baez and M. Betancourt, “Microscopic Anatomy of the Pearl Oyster Pinctada mazatlanica (Hanley, 1856),” Journal of Shellfish Research, Vol. 13, 1994, pp. 85-91.
[10] J.-S. Yoo, “Korean Shells in Color,” Iljisa Publishing Co., Seoul, 1988.
[11] S. Y. Hong, “Marine Invertebrates in Korean Coasts,” Academy Publishing Company, Inc., Seoul, 2006.
[12] R. L. Folk, “Petrology of the Sedimentary Rocks,”Austin, Texas, 1968.
[13] R. A. B. Drury and E. A. Wallington, “Carleton’s Histological Technique,” Oxford University Press, Oxford, 1980.
[14] P. G. Beninger, S. St-Jean, Y. Poussart and J. E. Ward, “Gill Function and Mucocyte Distribution in Placopecten magellanicus and Mytilus edulis (Mollusca: Bivalvia): The Role of Mucus in Particle Transport,” Marine Ecological Progress Series, Vol. 98, 1993, pp. 275-282. doi:10.3354/meps098275
[15] D. H. Cormack, “Introduction to Histology,” In: Essential Histology, 2nd Edition, Lippincott Williams & Wilkins, Philadelphia, 2001, pp. 1-23.
[16] R. G. Gustafson and R. G. B. Reid, “Larval and PostLarval Morphogenesis in the Gutless Protobranch Bivalve Solemya reidi (Cryptodonta: Solemyidae),” Marine Biology, Vol. 97, No. 3, 1988, pp. 373-387. doi:10.1007/BF00397768
[17] P. S. Galtsoff, “The American Oyster Crassostrea virginica Gmelin. Fishery Bulletin of the Fish and Wildlife Service,” United States Government Printing Office, Washington DC, 1964.
[18] M. S. Davies and J. Hawkins, “Mucus from Marine Mollusks,” Advance in Marine Biology, Vol. 34, 1998, pp. 1-71. doi:10.1016/S0065-2881(08)60210-2
[19] K. Kurosumi, S. Shibasaki and T. Ito, “Cytology of the Secretion in Mammalian Sweat Glands,” International Review of Cytology, Vol. 87, 1984, pp. 253-329. doi:10.1016/S0074-7696(08)62445-6
[20] R. Paniagua, M. Royuela, R. M. Garcia-Anchuelo and B. Fraile, “Ultrastructure of Invertebrate Muscle Cell Type,” Histology and Histopathology, Vol. 11, 1996, pp. 181201.
[21] A. Matsuno, “Ultrastructural Classification of Smooth Muscle Cells in Invertebrates and Vertebrates,” Zoological Science, Vol. 4, No. 1, 1987, pp. 15-22.
[22] J. Hanson and L. Lowy, “The Structure of the Muscle Fibers in the Translucent Part of the Adductor of the Oyster Crassostrea angulata,” Proceedings of the Royal Society B, Vol. 154, No. 955, 1961, pp. 173-196. doi:10.1098/rspb.1961.0027
[23] A. Matsuno, H. Ishida and H. Hori, “Two Kinds of Thick Filament in Smooth Muscle Cells in the Adductor of a Clam, Chlamys nobilis,” Tissue and Cell, Vol. 25, No. 3, 1993, pp. 325-332. doi:10.1016/0040-8166(93)90074-U

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