Spadix (zoology)

Diagram of the mouth of an adult male Nautilus pompilius. AS, antispadix; B, buccal mass; CS, cephalic sheath composed of the fused sheaths of the digital tentacles; O', preocular tentacle; O'', postocular tentacle; S, spadlx; SLL, superior labial lobe; V, Van der Hoeven's organ.

In the field of zoology, a spadix (pronounced /ˈspeɪdɪks/, "SPAY-dicks"; plural spadices /speɪˈdaɪsiːz/, "spay-DIE-seez") is a secondary sexual organ found in some cephalopods and hydrozoans. In the Nautilus genus, the spadix is a composite erectile organ in the male located in the oral region which is composed of four highly modified tentacles and which is paired with a somewhat smaller antispadix that is also composed of four tentacles. The spadix is normally a concealed organ but quickly becomes distended upon the animal's death. The exact function of the spadix and antispadix in Nautilus is not yet known.

单词	Antispadix
释义	Antispadix 英语百科 Spadix (zoology) In the field of zoology, a spadix (pronounced /ˈspeɪdɪks/, "SPAY-dicks"; plural spadices /speɪˈdaɪsiːz/, "spay-DIE-seez") is a secondary sexual organ found in some cephalopods and hydrozoans. In the Nautilus genus, the spadix is a composite erectile organ in the male located in the oral region which is composed of four highly modified tentacles and which is paired with a somewhat smaller antispadix that is also composed of four tentacles. The spadix is normally a concealed organ but quickly becomes distended upon the animal's death. The exact function of the spadix and antispadix in Nautilus is not yet known.
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Antispadix

Spadix (zoology)