Extended Data Fig. 4: Additional views of the possible leptomitid sponge UCBL-FSL713601 shown in Fig. 1d.
From: The Cabrières Biota (France) provides insights into Ordovician polar ecosystems
(a) Optical photograph under polarised light of the entire specimen. (b) Close-up view under polarised light from the box in (a) showing projected longitudinal spicules. Scale bars represent 1 cm in (a), and 5 mm in (b).
