Embryological development does not reflect the mature stages of other distant branches of this evolutionary bush. 胚胎学的发展也没有反映出进化丛中在远亲分支中存在这种成熟阶段。
He did a lot of research into the embryological origins of a rare blood disorder in vampire bats.He dissected their embryos and documented every stage of their embryonic life. 后来，他从胚胎学的角度对吸血蝙蝠罕见的血液失调的起因进行了大量的研究。
