And it kinda looked like a flipped-over stalkless sea lily.

起来有点像翻过来的无柄海合。

Crinoids became the most abundant echinoderms of the Ordovician, and some were the ancestors of today's stalkless feather stars and stalked sea lilies.

海合成为最丰富的棘皮动物，有些是今天无柄羽星和有柄海合的祖先。