The Calcari ad aptici e Saccocoma Formation, also known as the Saccocoma Formation (known in English as the Haptic limestones and Saccocoma Formation), is a geologic formation in Camponocecchio, Italy that dates back to the Tithonian (152 Ma) - it was first identified in 1976/1980,Fastelli, C. & Nicosia, U. (1980). L'Ittiosauro di Genga (Ancona). In I vertebrati fossili italiani (eds Parisi, G. & Seppi, G.), pp. 95–101. Verona: Catalogo della Mostra.De Marinis, G. & Nicosia, U. (2000). L'Ittiosauro di Genga. Castelferretti, Ancona: Cassa di Risparmio di Fabriano e Cupramontana Edizioni, 220 pp. and was named in 2002.Galluzzo, F. & Santantonio, M. (2002). The Sabina Plateau: a new element in the Mesozoic palaeogeography of Central Apennines. Bollettino della Società Geologica Italiana S1, 561–88. It was probably a marine shale due to the fossil content. Fossils found there include ammonites, cnidarians and the ichthyosaur Gengasaurus, discovered in 1976. Many of the fossils found in this formation are housed at the Spaelaeo-Palaeontologic Museum in Genga.
Paleofauna Indeterminate ammonites and cnidarians are known from the formation. Gengasaurus nicosiai Kobya monteneronensisG. A. Gill, M. Santantonio, and B. Lathuiliere. (2004). The depth of pelagic deposits in the Tethyan Jurassic and the use of corals: an example from the Apennines. Sedimentary Geology 166:311-334
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