Figure 1 in Superfoetative viviparity in a Carboniferous chondrichthyan and reproduction in early gnathostomes

Figure 1. Pregnant Harpagofututor volsellorhinus, CM 81935. A, entire specimen, fossil side A. Scale bar = 1 cm. B, corresponding overlay rendition; head reconstructed using CM 35501, 37521 as reference base. Scale bar = 1 cm. C, high magnification of foetuses, fossil side B (counterpart to side A, rotated 180° counter-clockwise). D, overlay rendition of foetal heads and other skeletal elements from fossil side B. Image opacity reduced to 75% to improve contrast against line drawing overlay. Scale bar = 1 mm increments. E, contrast of cranial size between the largest (1) and a smaller (2) embryo with crania facing in opposite directions. Scale as in panel D. Abbreviations: G, pectoral girdle; H, first haemal spine; IF, interorbital fenestra; L, lower jaw (Meckel's cartilage) articulation; M, Meckel's cartilage; N, neurocranium; O, orbit; PR, preorbital process; SO, supraorbital ridge; TP, tooth plates; TPa, anterior upper tooth plate; TPp, posterior upper tooth plate; TPm, Meckel's cartilage tooth plate; V, vertebral elements; 1–4, foetal heads.