postanal plate [昆] 肛后板

postanal field [昆] 后臀区

postanal dimple 尾小凹

postanal gut 肛后肠

postanal pit 尾小凹

postanal tail 肛后尾

postanal environment 后天环境

postanal intestine 肛后肠

postanal median groove 肛后中沟