query: على خاطر ريش الديناصورات مافيهوش سلسلة عظمية متطورة كاملة، تتسمى "العمود الفقري"، لكنها عندها خصايص أخرى للريش - كيما النتوءات والنتوءات الصغيرة.  الباحثين اكتشفوا أن العمود الفقري كان في الغالب نشأة تطورية جات مباعد للخصائص الأخرى هاذي.
positive: Because the dinosaur feathers do not have a well-developed shaft, called a rachis, but do have other features of feathers — barbs and barbules — the researchers inferred the rachis was likely a later evolutionary development that these other features.
negative: Because the dinosaur feathers do not have a well-developed shaft, called a rachis, but do have same features of feathers — barbs and barbules — the researchers inferred the rachis was likely a later evolutionary development that these same features. Because the dinosaur feathers have a well-developed shaft, called a rachis, but do have other features of feathers — barbs and barbules — the researchers inferred the rachis was likely a later evolutionary development that these other features.