Creusioid cirripedes from the Korytnica Clays (Middle Miocene; Holy Cross Mountains, Central Poland)

Abstract

The creusioid cirripedes recognized within rich organic communities in the topmost part of the Korytnica Clays (Middle Miocene; Holy Cross Mountains, Central Poland) are represented by the two species domiciled in the specifically selected coral species: common Creusia sanctacruensis BAŁUK & RADWAŃSKI, 1967, in Tarbellastroea reussia (MILNE-EDWARDS & HAIME), and relatively rare Creusia moravica PROCHAZKA, 1893, in Porites sp. The latter creusioid species, synonymized formerly with the other (C. costata SEGUENZA), is recognized as valid. The commensal relationship of these creusioid species to the host corals is reminded, and the problem of the boot selectivity in the ancient creusioid cirripedes is discussed.