Heterodontus omanensis, , Baldwin, 2005

3.1.6 | Heterodontus omanensis View in CoL

A medium-sized heterodontid egg case ( 97.3 mm ECL), lateral keels making 3 /4 rotations from anterior to posterior ends; surfaces smooth; anterior margin broad slightly S-shaped when viewed from anterior plane; widest at midportion, abruptly tapering posteriorly from midportion; keel base to keel apex at midportion very large (37.1% – 37.7% ECL); keels low and rigid (3.8% – 4.1% ECL), curving anteriorly, tapering into long curling tendrils at posterior end. Color golden brown when preserved (Figure 8).