Angolan ichnosite in a diamond mine shows the presence of a large terrestrial mammaliamorph, a crocodylomorph, and sauropod dinosaurs in the Early Cretaceous of Africa

作者：Mateus Octavio; Marzola Marco^*; Schulp Anne S; Jacobs Louis L; Polcyn Michael J; Pervov Vladimir; Goncalves Antonio Olimpio; Morais Maria Luisa

来源：Palaeogeography, Palaeoclimatology, Palaeoecology, 2017, 471: 220-232.

DOI：10.1016/j.palaeo.2016.12.049

• Catocapes angolanus
• Angolaichnus adamanticus
• Mammaliamorph
• Crocodylomorph
• Sauropod
• Tracks
• Cretaceous
• Angola
• Footprints

We report here new and the first mammaliamorph tracks from the Early Cretaceous of Africa. The tracksite, that also bears crocodylomorph and sauropod dinosaurian tracks, is in the Catoca diamond mine, Lunda Sul Province, Angola. The mammaliamorph tracks have a unique morphology, attributed to Catocapes angolanus ichnogen. et ichnosp. nov. and present an anterolateral projection of digit I and V. The tracks with an average length of 2.7 cm and width of 3.2 cm are the largest mammaliamorph tracks known from the Early Cretaceous unmatched in size in the skeletal fossil record. The crocodylomorph trackways and tracks are attributed to Angolaichnus adamanticus ichnogen. et ichnosp. nov. ('ichnofamily' Batrachopodidae) and present a functionally pentadactyl pes, an extremely outwardly rotated handprint, and an unusual tetradactyl and plantigrade manus. One medium-sized sauropod dinosaur trackway preserved skin impressions of a trackmaker with stride length of 1.6 m; a second is that of a small-sized sauropod trackmaker with a pace length of 75 cm.

• 出版日期2017-4-1