A new angiosperm leaf morphotype from the Early Cretaceous (Late Aptian) of San Luis basin, Argentina

Gabriela Griselda Puebla

Abstract


A new fossil angiosperm leaf morphotype, “LC-Microphyll trifoliate”, from the Late Aptian La Cantera Formation, central western Argentina, is described. The leaf remains occurred at the type section of the formation within a low diversity macrofloral association. Fossils are found mainly as isolated small size leaflets (0.3–1.5 cm long). They are pinnately compound (imparipinnate, trifoliate), the leaflets have pinnately lobed margin, first vein category pinnate, secondary veins craspedodromous opposite to subopposite ending at the apex of lobes and an intramarginal vein. “LC-Microphyll trifoliate” might be among the first record of leaf remains allied to the eudicots and one of the first consisting of compound leaves.

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