| 单词 | septal neck |
| 释义 | > as lemmasseptal neck septal neck n. Zoology and Palaeontology in chambered cephalopod shells, a (short) tube or collar extending from a perforation in each septum and supporting the siphuncle. ΚΠ 1882 J. F. Blake Monogr. Brit. Fossil Cephalopoda i. 39 Barrande..objects to these [theories] on several grounds. The first is the existence of a double envelope..; another is that the septal necks form a continuous tube; but this is scarcely the case. 1970 Elem. Palaeontol. viii. 86 Short septal necks encircle the siphuncle where it passes through the septa. < as lemmas |
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