Figure 5: <i>Ophiomitrella floorae</i> n. sp., from the lower Gronsveld Member (Maastricht Formation; St. Pieter and ENCI horizons) at the former ENCI-HeidelbergCement Group quarry, Maastricht, the Netherlands.
A–B: holotype (NHMM JJ 5104), dissociated proximal lateral arm plate in external (A) and internal (B) views; C: paratype (NHMM K 3387), articulated disc with basal arm segments in ventral view. <i>Ophiomitrella granulosa</i> Recent, as a close living relative of O. floorae n. sp. D–E: proximal lateral arm plate (SMNH-121224) in external (D) and internal (E) views; F–G: complete individual (MNHNEcOs22429) in dorsal view (F) and with detail of ventral disc skeleton (G). Abbreviations: AOS, adoral shield; AS, arm spine; do: dorsal; LAP, lateral arm plate; MO, muscle opening; NO, nerve opening; OS, oral shield; pr, proximal; R, ridge; T, tooth; VA, vertebral articulation; VAP, ventral arm plate. Scale bars equal 0,25 mm in A–B and D–E, and 1 mm in C and F–G.
[Scanning electron microscope images of Figs. F-G by Sabine Stöhr] Thuy B, Numberger-Thuy L, Jagt JWM. 2020. A new ophiacanthid brittle star (Echinodermata, Ophiuroidea) from sublittoral crinoid and seagrass communities of late Maastrichtian age in the southeast Netherlands. <i>PeerJ</i> 8: e9671 <a rel="nofollow" class="external free" href="https://doi.org/10.7717/peerj.9671">https://doi.org/10.7717/peerj.9671</a>
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