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 Chen Q C, 1995. Zooplankton of China seas (2) 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 Chen Q C, 1995. Zooplankton of China seas (2) 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 1. a segmented, laterally compressed body, without a distinct carapace 2. with sessile eyes 3. with appendages of different structure and function 4 . abdomen robust，♀♂without sexual differences 5. direct development
1 General morphology Characteristic features 1. a segmented, laterally compressed body, without a distinct carapace 2. with sessile eyes 3. with appendages of different structure and function 4 . abdomen robust，♀♂without sexual differences 5. direct development
1.1 Metamerism head, usually globular, varied with species in shape pereon (thorax), composed of 7 pereonites，each peronite bears a pair of pereopods abdomen, subdivided into pleon (metasome, 前腹部) and urosome (后腹部) telson (尾扇), small, varied with species in shape 1.2 Compound eyes Without eyestalk, pair, enormously developed ommatidia (单眼) , frequently covering most of the surface of the head
1.1 Metamerism head, usually globular, varied with species in shape pereon (thorax), composed of 7 pereonites，each peronite bears a pair of pereopods abdomen, subdivided into pleon (metasome, 前腹部) and urosome (后腹部) telson (尾扇), small, varied with species in shape 1.2 Compound eyes 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 A 1, A2 sexual dimorphic M ， M 1 ， M 2 Mp (Maxillipeds, 颚足 ) Thoracic limbs Gp (Gnathopods, 腮 足 ) ： 2 pairs, sexual dimorphism, ♂well developed P：5 pairs, uniramous Abdominal limbs Pl1-3, used for swimming Up1-3, used for jumping
1.3 Appendages A 1, A2 sexual dimorphic M ， M 1 ， M 2 Mp (Maxillipeds, 颚足 ) Thoracic limbs Gp (Gnathopods, 腮 足 ) ： 2 pairs, sexual dimorphism, ♂well developed P：5 pairs, uniramous 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 Suborder Hyperiidea (虫戎亚目): planktonic Suborder Gammaridea (钩虾亚目): benthic Suborder Caperellidea (麦杆虫亚目): benthic Suborder Ingolfiellidea (高英虫亚目): benthic
2 Classification Order Amphipoda Suborder Hyperiidea (虫戎亚目): planktonic Suborder Gammaridea (钩虾亚目): benthic Suborder Caperellidea (麦杆虫亚目): benthic Suborder Ingolfiellidea (高英虫亚目): benthic
Bases for identification of Hyperiidea Head A 1 Eyes P Gp forming chela or not telson fused with urosome or not
Bases for identification of Hyperiidea Head A 1 Eyes P Gp forming chela or not telson fused with urosome or not
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 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
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 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