Chapter 9 Chaetognatha Department of Oceanography
Chapter 9 Chaetognatha Department of Oceanography
References 萧贻昌, 2004. 中国动物志 无脊椎动物 V38 毛颚动物门 箭虫纲
References 萧贻昌, 2004. 中国动物志 无脊椎动物 V38 毛颚动物门 箭虫纲
Characteristic Features body transparent and elongated, bilateral symmetry bristles on the frontal part of body body form arrow-like embryonic development belong to Deutostoma coelom significance in studies on evolution, special group
Characteristic Features body transparent and elongated, bilateral symmetry bristles on the frontal part of body body form arrow-like embryonic development belong to Deutostoma coelom significance in studies on evolution, special group
9.1 General Features 9.1.1 External Features Head 1 ）hood 头巾 2 ）bristles (hook) 颚刺（颚毛） 3 ）tooth 4 ）eye 5 ）corona ciliata 纤毛冠 6 ）vestibular organ 前庭器
9.1 General Features 9.1.1 External Features Head 1 ）hood 头巾 2 ）bristles (hook) 颚刺（颚毛） 3 ）tooth 4 ）eye 5 ）corona ciliata 纤毛冠 6 ）vestibular organ 前庭器
hood anterior teeth row posterior teeth row corona ciliata vestibular organ hook eye
hood anterior teeth row posterior teeth row corona ciliata vestibular organ hook eye
corona cilliata Type A: 限于头部，呈盾形或卵圆形 S. enflata, S. hexaptera Type B: 从脑后向后伸展道躯干前部，细长，两侧作波浪状弯曲 S. pacifica, S. sinica, S. bipunctata, S. robusta Type C: 起于眼后，延伸到躯干前部，细长，有波状弯曲 S. crassa, S. delicata Type D: 分布局限于颈部，呈长圆形或扁圆形 Spadella plana, Spadella cephaloptera
corona cilliata Type A: 限于头部，呈盾形或卵圆形 S. enflata, S. hexaptera Type B: 从脑后向后伸展道躯干前部，细长，两侧作波浪状弯曲 S. pacifica, S. sinica, S. bipunctata, S. robusta Type C: 起于眼后，延伸到躯干前部，细长，有波状弯曲 S. crassa, S. delicata Type D: 分布局限于颈部，呈长圆形或扁圆形 Spadella plana, Spadella cephaloptera
eye “E” type: Sagitta sinica, S. crassa f. naikaiensis “B” type: S. nagae “star” type: S. enflata, S. bedoti “H” type: S. lyra, S. scrippsae “卜” type: S. pacifica, S. hexaptera, S. ferox
eye “E” type: Sagitta sinica, S. crassa f. naikaiensis “B” type: S. nagae “star” type: S. enflata, S. bedoti “H” type: S. lyra, S. scrippsae “卜” type: S. pacifica, S. hexaptera, S. ferox
vestibular organ vestibular organ vestibular groove
vestibular organ vestibular organ vestibular groove
Trunk collarette lateral fins Tail （1）tail fin （2）seminal vesicle
Trunk collarette lateral fins Tail （1）tail fin （2）seminal vesicle
seminal vesicle Type A：圆形或卵圆形，排精时侧面破裂 S. enflata Type B：前部膨大，后部狭长，沿前部侧面破裂 S. crassa Type C：长椭圆形，沿侧面或前部侧面破裂 S. bedoti Type D：前端侧面有齿状突起，沿侧面中段破裂排精 S. pacifica
seminal vesicle Type A：圆形或卵圆形，排精时侧面破裂 S. enflata Type B：前部膨大，后部狭长，沿前部侧面破裂 S. crassa Type C：长椭圆形，沿侧面或前部侧面破裂 S. bedoti Type D：前端侧面有齿状突起，沿侧面中段破裂排精 S. pacifica