FIGURE 1. All currently known specimens of the coastal bothremydid turtle Palemys bowerbankii, from the lower Eocene London Clay of the la Isle of Sheppey (Kent, England). 1-8, NHMUK 39449, neotype of Palemys bowerbankii and holotype of ‘Emys conybearii’, in dorsal (1-2), ventral (3-4), right lateral (5) and posterior (6) views. 7-8, details of the outer surface, near the second (7) and the fifth neurals (8). 9-10, dorsal view of the holotype of ‘Emys delabechii’, GSM 6634. 11-12, dorsal view of the previously unpublished specimen NHMUK 39451. 13-14, drawings corresponding to the currently lost holotype of ‘Platemys bowerbankii’, in dorsal (13) and ventral (14) views. Taken from the plate XXIII of Owen and Bell, 1849. 15-20, the previously unpublished specimen NHMUK 39452, in dorsal (15-16) ventral (17-18), right lateral (19), and anterior (20) views. 21-26, holotype of ‘Emys laevis’, NHMUK 37209, in dorsal (21-22), ventral (23-24), anterior (25), and right lateral (26) views. 27, details of the outer surface, near the left mesoplastron. 28-33, shell without collection number, previously published by Clouter et al. (2000, page 73) and by Rayner et al. (2009, pag. 167), in dorsal (28-29) ventral (30-31), anterior (32), and left lateral (33) views. The scale for 1-26 and 28-33 is the same.
FIGURE 2. Reconstruction of the complete dorsal (1) and ventral (2) shell of an adult specimen of Palemys bowerbankii, from the lower Eocene London Clay of the Isle of Sheppey (Kent, England). Abbreviations for the plates: C, costal; En, entoplastron; Ep, epiplastron; Hp, hypoplastron; Hy, hyoplastron; N, neural; Nu, nuchal; Ms, mesoplastron; P, peripheral; Py, pygal; Spy, suprapygal; Xi, xiphiplastron. Abbreviations for the scutes (in bold and capital letters): AB, abdominal; AN, anal; FE, femoral; GU, gular; HU, humeral; IG, intergular; M, marginal; PC, pectoral; PL, pleural; V, vertebral.
FIGURE 3. Phylogenetic position of Palemys bowerbankii (Pleurodira, Bothremydidae), from the lower Eocene London Clay of the Isle of Sheppey (Kent, England), in the strict consensus tree obtained by the cladistic analysis performed here. Bootstrap frequencies (top; only values equal to or greater than 50% shown) and Bremer support values (bottom) are indicated. The continents where each of these taxa were found are indicated.
