ecdysozoans造句

• Some fossil embryos are considered to belong to cnidarians and ecdysozoans, if they even fall into the metazoan crown group.
• Molecular clocks detect the radiation of three major clades of bilaterians  lophotrochozoans, deuterostomes, and ecdysozoans  during the early Cambrian.
• No deuterostome or lophotrochozoan embryos have yet been reported, despite their similar preservation potential; this may be a result of different egg laying behaviour, as ecdysozoans lay eggs in the sediment rather than releasing them into the open  enhancing the chance of them becoming mineralised.