琥珀 - Fossil matrix - Ricinulei(Spider relatives) - 22 mm - 14.5 mm

裂脊蛛目在古生物学中享有著名地位，因为它们是少数在被发现活体之前就已经以化石形态被发现的生物之一。虽然如今存活的物种极其怕光、性情隐秘，但它们的祖先在古生代曾繁盛多样。

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.
三分之四左右的已知裂脊蛛目化石物种来自晚石炭纪煤层，主要分布在欧洲和北美。古生物学家将这些古代成员分入已灭绝的亚目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.
向树木的转变：被琥珀保存的灭绝成员（如隶属于亚目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腿部适应性，科学家们认为在白垩纪时期它们以树皮为栖，成为树栖捕食者，而不是长期埋居于土壤中。

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.
裂脊蛛目是一个非常小而神秘的蛛形纲目。它们常被称为“披帽蜱蛛”，虽然它们既不是蜘蛛也不是蜱虫。它们是以捕食为生的节肢动物，栖息在落叶堆或洞穴中，通常长度不到1厘米。

Period: Cretaceous (100 million years old)
Location: Hukawng Valley, Myanmar
Size: Amber 22*14.5*5 mm