Manuel Quiring

化石拍卖（私人收藏）

Ricinulei 纲在古生物学中占有著名地位，因为它们是为数不多在被发现活体之前就已以化石形式被发现的生物之一。如今存活的种类极为回避光线、性情秘密，但它们的祖先在古生代时期曾繁盛且多样。

已知的 Ricinulei 化石物种大约四分之三来自晚石炭纪的煤层地层，主要在欧洲和北美发现。古生物学家将这些古代成员归入已灭绝的亚纲 Palaeoricinulei。

向树木的转变：以琥珀中保存的灭绝成员（如归入亚纲 Primoricinulei 的 Hirsutisoma grimaldii）显示了不同的生态位。基于它们毛茸茸的体表结构和脚部适应，科学家认为在白垩纪时期，它们生活在树皮上，作为树栖捕食者，而不是继续埋居在土壤里。

Ricinulei 是一种非常小且神秘的蛛形纲动物。它们通常被称为“罩盔跳蛛”（hooded tickspiders），尽管它们既不是蜘蛛也不是蜱。它们是掠食性节肢动物，栖居在落叶层或洞穴中，通常体长不到1厘米。

时期：白垩纪（约1亿年）
地点：缅甸 Hukawng 山谷
尺寸：琥珀 22×14.5×5 毫米

  The Order Ricinulei holds a famous place in paleontology because they are one of the very few organisms discovered as fossils before they were ever found alive. While today's surviving species are highly light-avoiding and secretive, their ancestors were once thriving and diverse during the Paleozoic Era.
  
  Roughly three-quarters of all known Ricinulei fossil species come from the Late Carboniferous coal measures, primarily found in Europe and North America. Paleontologists group these ancient members into the extinct suborder Palaeoricinulei.

  A Shift to the Trees: Extinct members preserved in amber (such as Hirsutisoma grimaldii under the suborder Primoricinulei) show a different ecological niche. Based on their hairy body structures and leg adaptations, scientists believe that during the Cretaceous, they lived on tree bark as arboreal predators, rather than staying buried in the soil.

  Ricinulei is a very small, mysterious order of arachnids. They are commonly known as "hooded tickspiders," although they are neither true spiders nor ticks. They are predatory arthropods that live in leaf litter or caves, usually measuring less than 1 centimeter in length.
  
Period: Cretaceous (100 million years old)
Location: Hukawng Valley, Myanmar
Size: Amber 22*14.5*5 mm



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琥珀 - 矩阵化石 - Ricinulei(Spider relatives) - 22 mm - 14.5 mm

白垩纪， 上 （1.005 - 0.66亿年）

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琥珀 - 矩阵化石 - Ricinulei(Spider relatives) - 22 mm - 14.5 mm

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