厦门大学：《海洋浮游生物学》课程教学资源（课件讲稿）第07章 浮游甲壳动物 Planktonic Crustacea 第6节 端足类

Chapter 7 Planktonic Crustacea Part IV Amphipoda Dr. Guo Dong-hui Email: guodh@jingxian.xmu.edu.cn 海洋与环境学院

Chapter 7 Planktonic Crustacea Part IV Amphipoda Dr. Guo Dong-hui Email: guodh@jingxian.xmu.edu.cn 海洋与环境学院

References ƒ Chen Q C, 1995. Zooplankton of China seas (2) ƒ 陈清潮, 石长泰, 2002. 中国动物志 无脊椎动物 V28 节肢动物门 甲壳动物亚门 端足目 (虫戎)亚目

References ƒ Chen Q C, 1995. Zooplankton of China seas (2) ƒ 陈清潮, 石长泰, 2002. 中国动物志 无脊椎动物 V28 节肢动物门 甲壳动物亚门 端足目 (虫戎)亚目

1 General morphology Characteristic features ƒ 1. a segmented, laterally compressed body, without a distinct carapace ƒ 2. with sessile eyes ƒ 3. with appendages of different structure and function ƒ 4 . abdomen robust，♀♂without sexual differences ƒ 5. direct development

1 General morphology Characteristic features ƒ 1. a segmented, laterally compressed body, without a distinct carapace ƒ 2. with sessile eyes ƒ 3. with appendages of different structure and function ƒ 4 . abdomen robust，♀♂without sexual differences ƒ 5. direct development

1.1 Metamerism ƒ head, usually globular, varied with species in shape ƒ pereon (thorax), composed of 7 pereonites，each peronite bears a pair of pereopods ƒ abdomen, subdivided into pleon (metasome, 前腹部) and urosome (后腹部) ƒ telson (尾扇), small, varied with species in shape 1.2 Compound eyes ƒ Without eyestalk, pair, enormously developed ommatidia (单眼) , frequently covering most of the surface of the head

1.1 Metamerism ƒ head, usually globular, varied with species in shape ƒ pereon (thorax), composed of 7 pereonites，each peronite bears a pair of pereopods ƒ abdomen, subdivided into pleon (metasome, 前腹部) and urosome (后腹部) ƒ telson (尾扇), small, varied with species in shape 1.2 Compound eyes ƒ Without eyestalk, pair, enormously developed ommatidia (单眼) , frequently covering most of the surface of the head

PEREON HEAD 3 456 PLEON 7 →UROSOME 2-3 pleopods

1.3 Appendages ƒ A 1, A2 sexual dimorphic ƒ M ， M 1 ， M 2 ƒ Mp (Maxillipeds, 颚足 ) ƒ Thoracic limbs Gp (Gnathopods, 腮 足 ) ： 2 pairs, sexual dimorphism, ♂well developed ƒ P：5 pairs, uniramous ƒ Abdominal limbs Pl1-3, used for swimming Up1-3, used for jumping

1.3 Appendages ƒ A 1, A2 sexual dimorphic ƒ M ， M 1 ， M 2 ƒ Mp (Maxillipeds, 颚足 ) ƒ Thoracic limbs Gp (Gnathopods, 腮 足 ) ： 2 pairs, sexual dimorphism, ♂well developed ƒ P：5 pairs, uniramous ƒ Abdominal limbs Pl1-3, used for swimming Up1-3, used for jumping

PALP MOBILIS COXA LACINIA. INCISOR MOLAR PALP BASIS Md Md b ISCHIU M INNER LOBES MERUS LOBE OUT (FUSED) (SEPARATE) CARPUS Mx2 PROPUS Mxp Mxp' DACTYL .e

2 Classification Order Amphipoda ƒ Suborder Hyperiidea (虫戎亚目): planktonic ƒ Suborder Gammaridea (钩虾亚目): benthic ƒ Suborder Caperellidea (麦杆虫亚目): benthic ƒ Suborder Ingolfiellidea (高英虫亚目): benthic

2 Classification Order Amphipoda ƒ Suborder Hyperiidea (虫戎亚目): planktonic ƒ Suborder Gammaridea (钩虾亚目): benthic ƒ Suborder Caperellidea (麦杆虫亚目): benthic ƒ Suborder Ingolfiellidea (高英虫亚目): benthic

Bases for identification of Hyperiidea ƒ Head ƒ A 1 ƒ Eyes ƒ P ƒ Gp forming chela or not ƒ telson fused with urosome or not

Bases for identification of Hyperiidea ƒ Head ƒ A 1 ƒ Eyes ƒ P ƒ Gp forming chela or not ƒ telson fused with urosome or not

ƒ Eyes small or absent. M 1 with inner lobes. Mp with inner lobes usually separate, sometimes partially fused, and rarely completely fused. P 1 always simple, rarely prehensile. P 2 simple. .Physosomata 体箱虫戎次目 ƒ Eyes large, always occupying most of head surface (small to moderate in Vidilia and Bougisia). M 1 without inner lobes. Mp with inner lobes always fused. P1-2 usually prehensile, less commonly simple. .Physocephalata 头箱虫戎次目

ƒ Eyes small or absent. M 1 with inner lobes. Mp with inner lobes usually separate, sometimes partially fused, and rarely completely fused. P 1 always simple, rarely prehensile. P 2 simple. .Physosomata 体箱虫戎次目 ƒ Eyes large, always occupying most of head surface (small to moderate in Vidilia and Bougisia). M 1 without inner lobes. Mp with inner lobes always fused. P1-2 usually prehensile, less commonly simple. .Physocephalata 头箱虫戎次目