During the Late Carboniferous many fossils were preserved in the north-central part of the state. Texas had a fauna including algae, brachiopods, corals, crinoids, fusulinids, gastropods, and pelecypods during the Pennsylvanian epoch. Pennsylvanian fossils are widespread in Texas. Pennsylvanian fossils of the listed taxa were preserved in both the Diablo and Hueco Mountains. The Llano Uplift region also preserves Pennsylvanian fossils. The north-central region of the uplift is the best source. Pennsylvanian taxa preserved there included brachiopods, branching bryozoans, lacy bryozoans, horn corals, other corals, crinoids, fusulinids, gastropods, goniatites, nautiloids, and pelecypods. The contemporary vertebrate fauna included sharks, which left behind their teeth. Plant fossils were preserved in abundance in the Llano Uplift, north-central, and Trans Pecos Texas. Plant fossils from the latter two localities tended to be poorly preserved. Very early reptile fossils are also known from the deposits of the Llano Uplift.