At the third stage of mysis, the subgastric artery originated from the extension of anterolateral artery endothelia at the position ahead of heart, and the dorsal mesodermal cells of larvae accumulated around endothelia as the stromal matrix cells.

• 淋巴器官由胃次动脉末端多次分支形成的淋巴小管网构成，胃次动脉自糠虾第3期由前侧动脉内皮细胞在肝动脉前方位置向外延伸开始形成，同时由幼体背一部的中胚层细胞在内皮细胞外堆积形成基质细胞。