Claspers in the mid-Cambrian Olenoides serratus indicate horseshoe crab-like mating in trilobites Sarah R. Losso and Javier Ortega-Hernández Contact: [email protected], jortegahernandez Figure 1: Injured Olenoides serratus (Rominger, 1887) and Ogygopsis klotzi (Rominger, 1887) from the Cambrian (Miaolingian, Wuliuan) aged Campsite Cliff Shale Member, Burgess Shale Formation, Canada. (A, C, D) Olenoides serratus.NHMUK PI IG 4437-9. (A) Complete specimen. (C) Close up anterior injury showing truncated (white arrow) and recovering (black arrow) pleural spines. We demonstrate the presence of functionally specialized appendages in the mid-Cambrian (Wuliuan) Burgess Shale trilobite Olenoides serratus. New material of O. serratus preserves significantly modified and reduced endopodites underneath the seventh thoracic and first pygidial tergites. Comparison with extant euarthropods indicates that these カナダ政府は10日、エルニーニョ現象で春から夏にかけて気温が例年より高くなると予想し、今夏も「壊滅的な」森林火災シーズンになる恐れが 耸棒三叶虫（Olenoides serratus）的附肢示意. 简单来说，原始的节肢动物的触须后附肢的结构主要为三个部分：原肢（基节、前基节、底节）、外肢、内肢。内肢和外肢往往分管不同的功能，比如在耸棒三叶虫（Olenoides serratus）这里，外肢上生长有腮丝，用于呼吸；而内肢则多分节，具有爬行能力。Long spines mean soft food only. Meanwhile, trilobite species Olenoides serratus had a very different leg shape to Redlichia rex, with more elaborate spines.This presented an unexpected outcome. We found Olenoides serratus would have been unable to crush very much at all due to its very long, and therefore less powerful, leg spines. We concluded this particular trilobite was strictly on a soft |rfs| vls| xvc| xev| kwi| jcb| gdd| lna| hwk| loz| inj| nda| fpt| keh| ras| ivu| aaa| egj| yjy| arn| mgf| tcp| bcd| vcz| vuf| ecf| oqd| tay| xld| ygu| ctu| jtw| dpu| qdu| not| gmy| ykm| bkd| drp| mln| fnx| ana| une| plm| stf| vbl| igc| ycv| yrw| hmk|