Arafuraoonishi (English spelling) Australian trumpet

Japanese: アラフラオオニシ - あらふらおおにし(英語表記)Australian trumpet
Arafuraoonishi (English spelling) Australian trumpet

A gastropod snail of the family Acanthidae in the class Gastropoda of the phylum Mollusca. It is a large species found from the east coast of Australia through the Arafura Sea on the north coast to parts of Indonesia, living on muddy bottoms at depths of 20 to 50 meters. It is the largest snail in the world, with a shell height of 70 centimeters and a shell diameter of 35 centimeters. The shell is thick and yellow-orange, spindle-shaped, with ridges at the shoulders and bottom edges, and is almost flat between them. The shell surface is covered with a velvety yellow-brown shell, with a wide opening and long water channel. The lid is horny and leaf-shaped. The shell surface is polished and carved to make ornaments. The Japanese name comes from the fact that it was brought back by a pearl oyster (Shirochogai) harvesting ship from the Arafura Sea after World War II.

[Takashi Okutani]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

軟体動物門腹足綱テングニシ科の巻き貝。大形種で、オーストラリア東岸から、北岸のアラフラ海を経て、インドネシアの一部にかけて分布し、水深20~50メートルの泥底にすむ。巻き貝では世界最大となり、殻高70センチメートル、殻径35センチメートルに達する。殻は黄橙(おうとう)色の太い紡錘形で、肩と底部周縁に稜角(りょうかく)があり、その間はほとんど平らである。殻表は黄褐色のビロード状をした殻皮に覆われ、殻口は広く水管溝は長い。蓋(ふた)は角質の葉状形。殻表を磨いたり彫刻を施したりして置物などにする。和名は、第二次世界大戦後アラフラ海の真珠貝(シロチョウガイ)採取船が持ち帰ったことに由来する。

[奥谷喬司]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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