Gyaltsenglossus senis: A Hemichordate from the Middle Cambrian Burgess Shale.
[sciencythoughts.blogspot.com]
Hemichordate relationships remain contentious due to conflicting molecular results and the high degree of morphological disparity between the two Hemichordate classes, Enteropneusta and Pterobranchia. Additionally, Hemichordates have a poor fossil record outside of the Cambrian, with the exception of the collagenous tubes of the Pterobranchs (which include Graptolites). By the Middle Cambrian, tube-dwelling colonial Pterobranchs and tube-dwelling enteropneusts coexisted, supporting the origin of the Hemichordate body plan earlier in the Cambrian without clarifying the morphology of their last common ancestor.
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Feel free to reply to any comment by clicking the "Reply" button.Now , translating this into common English , are these spiders ? tarantulas ? under sea critters ? something else altogether ?
Cast1es
Level 9
Dec 20, 2020
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Good to know I'm not the only one lost in that sea of terminology!
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