Figure 4From: Mesozoic fossils (>145 Mya) suggest the antiquity of the subgenera of Daphniaand their coevolution with chaoborid predatorsSEMs of Mesozoic daphniid ephippia from Khotont, Mongolia. a-c. Daphnia (Ctenodaphnia) from fragment 2048, its caudal needle and dorsal portion. d. Daphnia (Ctenodaphnia) from fragment 2044. e. Unknown daphniid from fragment 2009. f. Simocephalus from fragment 2026. Scales: 0.1 mm for a, d-f; 0.01 mm for b-c.Back to article page