Spider capture silk is a natural scaffolding material that outperforms most synthetic materials in terms of its combination of strength and elasticity. Among the various kinds of silk threads, cribellar thread is the most primitive prey-capturing type of spider web material. We analyzed the functional organization of the sieve-like cribellum spigots and specialized calamistral comb bristles for capture thread production by the titanoecid spider Nurscia albofasciata. The outer cribellar surface is covered with thousands of tiny spigots, and the cribellar plate produces non-sticky threads composed of thousands of fine nanofibers. N. albofasciata cribellar spigots are typically about 10 μm long, and each spigot appears as a long individual shaft with a pagoda-like tiered tip. The five distinct segments comprising each spigot is a defining characteristic of this spider. This segmented and flexible structure not only allows for spigots to bend individually and join with adjacent spigots, but it also enables spigots to draw the silk fibrils from their cribella with rows of calamistral leg bristles to form cribellar prey-capture threads.

中文翻译：

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捕获小床网蜘蛛中的丝支架生产

蜘蛛捕捉丝是一种天然脚手架材料，在强度和弹性的结合方面优于大多数合成材料。在各种丝线中，草床线是最原始的捕食蛛网材料。我们分析了筛状 cribellum spigots 和专门的 calamistral 梳状刷毛的功能组织，用于捕获钛白蜘蛛 Nurscia albofasciata 的线生产。外床板表面覆盖着数千个微小的栓塞，床板板产生由数千条细纳米纤维组成的非粘性线。N. albofasciata cribellar 水龙头通常长约 10 微米，每个水龙头都表现为一个长长的单独轴，带有宝塔状的分层尖端。包含每个龙头的五个不同部分是这种蜘蛛的一个定义特征。这种分段且灵活的结构不仅允许水龙头单独弯曲并与相邻的水龙头连接，而且还使水龙头能够从带有成排的爪状腿刷毛的小床中拉出丝原纤维，形成小床捕捉猎物的线。