New isopod and achelatan crustaceans from mid–Cretaceous reefal limestones in the Basque-Cantabrian Basin, northern Spain

Mid-Cretaceous (upper Albian) strata of the Basque-Cantabrian Basin in northern Spain are renowned for their highly diverse crustacean assemblages from reef settings. From the Koskobilo quarry, two small, enrolled specimens of a sphaeromatid isopod, Cymodoce (?) scopula sp. nov., and the posterior part of a carapace of a palinurid achelatan, Palaeopalinurus serratus sp. nov., are recorded. In view of the remarkably complete preservation of the...