Fig. 1: Mieridduryn bonniae nov. gen. et sp. from the Castle Bank Biota (NMW.2021.3 G.7).
From: Ordovician opabiniid-like animals and the role of the proboscis in euarthropod head evolution

a Overview of whole specimen. Boxes indicate areas depicted in Fig. 2. b Explanatory drawing of (a). Dashed white line indicates ventralmost point of left dorsolateral flaps, and demonstrates the twisted nature of the specimen. Blue lines indicate filamentous setal structures. ds dorsal sclerite, gu gut, lf left dorsolateral flap, ll left lobopod, mo mouth, pr proboscis, rf right dorsolateral flap, rl right lobopod, sr strengthening ray, sp dorsal spines on proboscis.