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In anatomy, the term rostrum (from the Latin ''ラテン語:rostrum'' meaning ''beak'') is used for a number of phylogenetically unrelated structures in different groups of animals. ==Invertebrates== * In crustaceans, the rostrum is the forward extension of the carapace in front of the eyes. It is generally a rigid structure, but can be connected by a hinged joint, as seen in Leptostraca. * Among insects, the rostrum is the name for the piercing mouthparts of the order Hemiptera. The long snout of weevils may also be called a rostrum. * Gastropod molluscs have a rostrum or proboscis. * Cephalopod molluscs have hard beak-like mouthparts referred to as the rostrum.〔(【引用サイトリンク】title=Cephalopods )〕 File:Washington DC Zoo - Macrobrachium rosenbergii 6.jpg|Crustacean: the rostrum of the shrimp ''Macrobrachium rosenbergii'' is serrated along both edges. File:Gminatus australis with Beetle.jpg|Insect: assassin bug piercing its prey with its rostrum File:Architeuthis beak.jpg|Cephalopod: the two-part beak of a giant squid 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rostrum (anatomy)」の詳細全文を読む スポンサード リンク
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