Heterodontus galeatus (Gunther, 1870)

3.1.2 | Heterodontus galeatus View in CoL

A medium-sized heterodontid egg case ( 88.6 – 125.6 mm ECL), lateral keels making three to four rotations from anterior to posterior ends; surfaces smooth; anterior margin broad and strongly S-shaped when viewed from anterior plane; broadest at midportion, posterior third gradually tapering posteriorly; keel base to keel apex space at midportion small (2.2% – 7.9% ECL); keels moderate in width (9.5% – 13.8% ECL), firm (not flexible but not rigid), projecting anteriorly and curving anteriorly at anterior portion (Figure 2b), keels tapering into long curling tendrils at posterior end. Color reddish brown to dark brown when preserved (Figure 4), with deposited egg cases appearing reddish brown to dark brown.