タマガイ科 3 亜科における嗅検器の形態と生態との関連について

概要

論文の詳細を見る
There are three subfamilies among the Family Naticidae, namely, Naticininae, Polinicinae and Sininae in Japan. These three are easily recognizable by differences of shell form and operculum. The structure and number of leaflets of the osphradium of 7 naticid species were examined. The number of osphradium leaflets of Tectonatica janthostomoides (Naticinae), Glossaulax didyma (Polinicinae) and Sinum javanicum (Sininae), are 110-96, 80-76 and 58-57, respectively. The Naticinae has a simple structure, Polinicinae and Sininae have complicated leaflets. The shell of Naticinae is spherical while that of Polinicinae is hemispherical and that of Sininae is depressed. The Naticinae has a flat propodium, while Polinicinae and Sininae have developed propodia which can envelope the shells forming a shoe-like appearance that is most efficient for burying. The Sininae cannot withdraw the soft part into the shell. The members of Naticinae live near the surface of a sandy bottom, while Polinicinae bury decp in a sandy bottom. Within Naticidae, the number or complexity of the osphradium leaflets are correlated to habitat. The increased complexity might enable burying forms to utilized limited water in the interstices of sand more efficiently. On the contrary, the increased number of osphradium leaflets seem to be characteristic of shallow burying forms that can utilize abundant environmental water.
日本貝類学会の論文
1988-07-15