FIG. 10. — A, Chelodina alanrixi n in Eocene chelid turtles from Redbank Plains, Southeast Queensland, Australia

FIG. 10. — A, Chelodina alanrixi n. sp., form 1, Redbank Plains, Queensland, Eocene (QM F18344), 40-41 cm long, reconstruction of the carapace, dorsal view, missing parts doted, presenting generic identities and specific differences with C. expansa in B-D; a, flattened, large and wide carapace as in C. expansa; b, narrow vertebrals, the first one narrower than the nuchal bone, the second to fourth narrower than the first and fifth, the third particularly narrow, vertebrals narrower than in C. expansa except the fifth that is wider than the suprapygal bone; c, polygons of the decoration c. 1/3 smaller than in C. expansa (see D and compare with Fig. 1B); d, 8 neurals present, against no one in C. expansa; e, vertebral 5 wider than the suprapygal contrarily to C. expansa; f, long and flat posterior extremity, as in C. expansa, slightly pointed as in males in C. expansa; B, C. expansa, extant (MNHN AC 1914-178), 37.5 cm long; a, large and wide carapace as in C. alanrixi n. sp. (anteriorly narrower in males); b, wide vertebral 1 wider than the nuchal bone, the vertebrals 2 to 4 (the fourth subdivided) progressively narrowing; c, large polygons (see D); d, no neurals (never); e, vertebral 5 narrower than the suprapygal; f, long and flat posterior extremity, slightly pointed as in C. alanrixi n. sp. but more rounded border (a female); C, C. expansa Gray, 1856 (pl. XII), holotype, from Goode (1967) and Wermuth & Mertens (1961), 35 cm long, a male (anteriorly narrower and posteriorly pointed, plastron with a concavity); D, C. expansa, extant (MNHN AC 1914-178), 37.5 cm long, detail of the decoration of the carapace in the area of the vertebral 4 (subdivided here), compare with Fig. 1B. Scale bars: A, B, 10 cm; D, 2 cm.