cyclostomes

基本解釋

possible predecessor of the cyclostomes.
可能是圓口綱脊椎動(dòng)物的祖先。
eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms.
缺少下巴或成對(duì)附器的似鰻的動(dòng)物包括圓口綱脊椎動(dòng)物和某些滅絕的種類。
small (2 in) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes.
2英寸大小已經(jīng)滅絕的長(zhǎng)有帶鰭尾、脊索和含有細(xì)胞質(zhì)狀骨胳的錐形牙齒似鰻的魚(yú)；後寒武紀(jì)到後三曡紀(jì)的生物；可能是圓口綱脊椎動(dòng)物的祖先。