Figure 1

Parasite-host interaction. (a), Fossil dendrobranchiate shrimp, Araripenaeus timidus Pinheiro, Saraiva & Santana, 2014³⁴ (lateral view) and the putative epicaridean isopod imprints. The black arrow shows the characteristic swelling in the shrimp branchial chamber indicating infestation by an epicaridean isopod. The white arrow indicates the unidentified fossil body imprint. (b), Shrimp line drawing. Dashed-lines show the non-preserved parts and the branchial chamber swelling. (c, d), Part and counter part of the unidentified fossil remains attached to the pereopods of Araripenaeus timidus. (e), Detail of the suboval fossil body attached to the shrimp’s pereopods. Pereopod segments: ?br, ?branchiae; ba, basis; ex, exopodite; is, ischium; me, merus; ca, carpus. Black line denotes the body outline. (f), Putative interpretation of the bopyrid outline, pleomeres 1–5 (pl1–pl5), and pleotelson (pt), arrow indicates anterior end of specimen.