Morphological Variation of a Rock-boring Clam, Penitella kamahurensis (YOKOYAMA), and its Relation to the Hardness of the Bored Rock

YASUHIRO ITO

doi:10.5179/benthos1990.1994.47_23

穿孔性二枚貝カモメガイの形態変異と岩石の硬さとの関係

伊藤泰弘

著者情報

ジャーナルフリー

1994 年 1994 巻 47 号 p. 23-36

DOI https://doi.org/10.5179/benthos1990.1994.47_23

詳細

発行日: 1994/08/30 受付日: 1994/04/22 J-STAGE公開日: 2009/08/07 受理日: 1994/05/28 早期公開日: - 改訂日: -
訂正情報
訂正日: 2009/08/07 訂正理由: - 訂正箇所: 引用文献情報訂正内容: Wrong : EVANS, J. W., 1968a. Factors modifying the morphology of the rock-boring clam, Penitella penita (CONRAD, 1837). Proc. Malac. Soc. Lond., 38 : 111-119.
EVANS, J. W., 1968b. The effect of rock hardness and other factors on the shape of the burrow of the rock-boring clam, Penitella penita. Palaeogeography, Palaeoclimatol., Palaeoecol., 4 : 271-278.
EVANS, J. W., 1968c. Growth rate of the rock-boring clam Penitella penita (CONRAD, 1837) in relation to hardness of rock and other factors. Ecology, 49 : 619-628.
EVANS, J. W. and M. H. LEMESSURIER, 1972. Functional micromorphology and circadian growth of the rock-boring clam Penitella penita. Can. J. Zool., 50 : 1251-1258.
HABE, T., 1955. Fauna of Akkeshi Bay. XXI. Pelecypoda and Scaphopoda. Publ. Akkeshi Mar. Biol. Stat. 4 : 1-31.
HAMADA, S. and T. OKUTANI, 1967. An abalone-borer, Navea subglobosa GRAY, newly found from Japan and its damage. Venus, 26 : 41-46.
ITDIGAWA, J., 1963. Miocene rock- and wood- boring bivalves and their burrows from the Mizunami group, central Japan. J. Earth Sci., Nagoya Univ., 11 : 101-123.
KENNEDY, G. L., 1989. Status of Penitella gabbii (TRYON, 1863) in the eastern and western Pacific, and description of the previously misidentified eastern Pacific species (Bivalvia: Pholadidae). Veliger, 32 : 313-319.
MORTON., B., 1986. The biology and functional morphology of the coral- boring Jouannetia cumingii (Bivalvia: Pholadacea). J. Zool., Lond. (A), 208 : 339-366.
NAIR, N. B. and A. D. ANSELL, 1968. The mechanism of boring in Zirphaea crispata (L.) (Bivalvia: Pholadidae). Proc. Roy. Soc. B., 170 : 155-173.
RÖDER, H., 1977. Zur Beziehung zwischen Konstruktion and Substrat bei mechanisch bohrenden Bohrmuscheln (Pholadidae, Teredinidae). Senchenbergiana marit., 9 : 105-213.
SEILACHER, A., 1985. Bivalve morphology and function. In, Mollusks - Note for a short course, ed. by D. J. BOTTJER, C. S. HICKMAN and P. D. WARD, University of Tennessee, Knoxville publication, Florida, pp. 88-101.
SMITH, E. H., 1969. Functional morphology of Penitella conradi relative to shell-penetration. Am. Zoologist, 9 : 869-880.
TURNER, R. D., 1954. The family Pholadidae in the western Atlantic and the eastern Pacific part I - Pholadidae. Johnsonia, 3 : 1-64.
TURNER, R. D., 1955. The family Pholadidae in the western Atlantic and the eastern Pacific part II - Martesiinae, Jouannetiinae and Xylophaginae. Johnsonia, 3 : 65-160.
YOKOYAMA, M., 1922. Fossils from the upper Musashino of Kazusa and Shimosa. J. Coll. Sci., Imper. Univ. Tokyo, 44 : 1-200.

Right : EVANS, J. W., 1968a. Factors modifying the morphology of the rock-boring clam, Penitella penita (CONRAD, 1837). Proc. Malac. Soc. Lond., 38 : 111-119.
EVANS, J. W., 1968b. The effect of rock hardness and other factors on the shape of the burrow of the rock-boring clam, Penitella penita. Palaeogeography, Palaeoclimatol., Palaeoecol., 4 : 271-278.
EVANS, J. W., 1968c. Growth rate of the rock-boring clam Penitella penita (CONRAD, 1837) in relation to hardness of rock and other factors. Ecology, 49 : 619-628.
EVANS, J. W. and M. H. LEMESSURIER, 1972. Functional micromorphology and circadian growth of the rock-boring clam Penitella penita. Can. J. Zool., 50 : 1251-1258.
HABE, T., 1955. Fauna of Akkeshi Bay. XXI. Pelecypoda and Scaphopoda. Publ. Akkeshi Mar. Biol. Stat. 4 : 1-31.
HAMADA, S. and T. OKUTANI, 1967. An abalone-borer, Navea subglobosa GRAY, newly found from Japan and its damage. Venus, 26 : 41-46.
ITDIGAWA, J., 1963. Miocene rock- and wood- boring bivalves and their burrows from the Mizunami group, central Japan. J. Earth Sci., Nagoya Univ., 11 : 101-123.
KENNEDY, G. L., 1989. Status of Penitella gabbii (TRYON, 1863) in the eastern and western Pacific, and description of the previously misidentified eastern Pacific species (Bivalvia: Pholadidae). Veliger, 32 : 313-319.
MORTON., B., 1986. The biology and functional morphology of the coral- boring Jouannetia cumingii (Bivalvia: Pholadacea). J. Zool., Lond. (A), 208 : 339-366.
NAIR, N. B. and A. D. ANSELL, 1968. The mechanism of boring in Zirphaea crispata (L.) (Bivalvia: Pholadidae). Proc. Roy. Soc. B., 170 : 155-173.
RÖDER, H., 1977. Zur Beziehung zwischen Konstruktion and Substrat bei mechanisch bohrenden Bohrmuscheln (Pholadidae, Teredinidae). Senchenbergiana marit., 9 : 105-213.
SEILACHER, A., 1985. Bivalve morphology and function. In, Mollusks - Note for a short course, ed. by D. J. BOTTJER, C. S. HICKMAN and P. D. WARD, University of Tennessee, Knoxville publication, Florida, pp. 88-101.
SMITH, E. H., 1969. Functional morphology of Penitella conradi relative to shell-penetration. Am. Zoologist, 9 : 869-880.
TURNER, R. D., 1954. The family Pholadidae in the western Atlantic and the eastern Pacific part I - Pholadidae. Johnsonia, 3 : 1-64.
TURNER, R. D., 1955. The family Pholadidae in the western Atlantic and the eastern Pacific part II - Martesiinae, Jouannetiinae and Xylophaginae. Johnsonia, 3 : 65-160.
YOKOYAMA, M., 1922. Fossils from the upper Musashino of Kazusa and Shimosa. J. Coll. Sci., Imper. Univ. Tokyo, 44 : 1-200.

抄録

Two discrete morphological types were recognized among the populations of a boring bivalve, Penitella kamakurensis, based mainly on whether the anterior end of the shell (beak) is pointed (P-type) or rounded (R-type). The relative abundance of the two types varies from place to place according to the hardness of the rock in each locality. P-type individuals are abundant in softer rocks and R-type in harder rocks. In R-type individuals, the width of growth band is narrower, the size of posterior adductor muscle scar is larger, and the shell is thicker than in P-type individuals from the same locality. Individuals of either shell type living in harder rocks show the same tendencies in comparison with those of the same shell type from softer rocks.

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