Upper Jurassic–lowermost Cretaceous shallow-water, algae-bearing carbonates outcropping in Poland represent Tethys (Outer Carpathians) and its northern passive margin (Holy Cross Mts.). Oxfordian–Kimmeridgian algae for the Holy Cross Mts. occur in coral-ooidal megafacies (“bahamite” facies). Except of solenoporaceans which are locally abundant, algae are rare and poorly differentiated taxonomically (Solenopora sp., Parachaetetes cf. asvapatii, Marinella lugeoni, Thaumatoporella parvovesiculifera, rare Dasycladales: Terquemella sp., Salpingoporella annulata, S. gr. pygmaea,? Petrascula sp.). Microbial structures, microencrusters (except Bacinella-Lithocodium oncoids) and rivulariacean-like cyanobacteria are rare. Stramberk-type limestones (Tithonian (mainly)-lowermost Cretaceous) are known only as exotic pebbles, boulders, rarely klippes, occurring within Cretaceous-Palaeogene flysch deposits of the Outer Carpathians. Two main algae-bearing facies have been recognized:(1) coral-microbial biolithite facies containing Thaumatoporella parvovesiculifera, Nipponophycus ramosus, Neoteutloporella socialis and other fragments of Dasycladales, rare solenoporaceans and Marinella lugeoni. Microencrusters, including problematic Iberopora bodeuri, as well microbial structures are abundant and diverse;(2) algal-foraminiferal facies dominated by Dasycladales represented by 19 species of the genera Salpingoporella, Anisoporella, Petrascula, Linoporella, Campbelliella, Otternstella, Montenegrella, and relatively rare Clypeina sulcata. Both of these facies can co-occur with Bacinella-Lithocodium boundstones containing Thaumatoporella parvovesiculifera. A facies-related distribution pattern accounts for some of these algae and their associations. However, differences between algae from the Carpathians and the Holy Cross Mts., apart of different age, primarily reflect the palaeogeographical position of these areas during Late Jurassic.