Twins! Microsatellite analysis of two embryos within one egg case in oviparous elasmobranchs - Fig 1

(A1) Two R. undulata juveniles in one, splayed open, egg case. (A2) The ventral surface and (A3) the dorsal surface of the two R. undulata twins. (B1) The S. stellaris twin egg case (middle) next to its paired-egg case and another egg (bottom). (B2) Closer view of the twined egg case. (C1) S. canicula twin embryos (bottom) next to a non-twin sibling (top). (C2) S. canicula twins after removal from their egg case. The black scale bars are 1cm in length.