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4节 磷虾类

Chapter 7 Planktonic Crustacea Part VI Euphausiacea Department of Oceanography

Chapter 7 Planktonic Crustacea Part VI Euphausiacea Department of Oceanography

References ƒ Baker A de C, Boden B P, Brinton E, 1990. A practical guide to the euphausiids of the world. 96p ƒ Mauchline J, Fisher L R, 1969. The biology of euphausiids. Advances in Marine Biology, 7, 454p ƒ Mauchline J, 1980. The biology of mysids and euphausiids. Advances in Marine Biology, 18, 681p

References ƒ Baker A de C, Boden B P, Brinton E, 1990. A practical guide to the euphausiids of the world. 96p ƒ Mauchline J, Fisher L R, 1969. The biology of euphausiids. Advances in Marine Biology, 7, 454p ƒ Mauchline J, 1980. The biology of mysids and euphausiids. Advances in Marine Biology, 18, 681p

Features – a complete carapace covering the entire cephalothorax – complete similarity of all biramous thoracic limbs – podobranchia – Photophores – Indirectly development

Features – a complete carapace covering the entire cephalothorax – complete similarity of all biramous thoracic limbs – podobranchia – Photophores – Indirectly development

1 General morphology 1.1 External features ƒ cephalothorax ƒ abdomen ƒ rostrum ƒ cervical groove ƒ Lateral denticles ƒ dorsal spine ƒ dorsal keel ƒ preanal spine

1 General morphology 1.1 External features ƒ cephalothorax ƒ abdomen ƒ rostrum ƒ cervical groove ƒ Lateral denticles ƒ dorsal spine ƒ dorsal keel ƒ preanal spine

Appendages ƒ A 1 ƒ A 2 ƒ M；M 1；M 2 ƒ P1-8 ƒ Pl1-5 ƒ Up

Appendages ƒ A 1 ƒ A 2 ƒ M；M 1；M 2 ƒ P1-8 ƒ Pl1-5 ƒ Up

1.2 Internal morphology ƒ 1.2.1 Digestive system: mouth – esophagus – stomach – midgut – hindgut - anus ƒ 1.2.2 Circulation ƒ 1.2.3 Respiration system: podobrachiae ƒ 1.2.4 Excretory system: antennal glands ƒ 1.2.5 Reproductive system: ♀♂dioecious ƒ 1.2.6 Nervous system and sensory organ：compound eyes ƒ 1.2.7 Photophores

1.2 Internal morphology ƒ 1.2.1 Digestive system: mouth – esophagus – stomach – midgut – hindgut - anus ƒ 1.2.2 Circulation ƒ 1.2.3 Respiration system: podobrachiae ƒ 1.2.4 Excretory system: antennal glands ƒ 1.2.5 Reproductive system: ♀♂dioecious ƒ 1.2.6 Nervous system and sensory organ：compound eyes ƒ 1.2.7 Photophores

2 Classification Crustacea Malacostraca Eucarida Euphausiacea (2 families, 11 genera, 87 species) Family Bentheuphausiidae Family Euphausiidae

2 Classification Crustacea Malacostraca Eucarida Euphausiacea (2 families, 11 genera, 87 species) Family Bentheuphausiidae Family Euphausiidae

Order Euphausiacea 1a Photophores present only on abdominal segment one .Stylocheiron 手磷虾属 1b Photophores present on abdominal segments one to four .2 1c No photophores on abdomen or thorax . 3 1b 1a 1c

Order Euphausiacea 1a Photophores present only on abdominal segment one .Stylocheiron 手磷虾属 1b Photophores present on abdominal segments one to four .2 1c No photophores on abdomen or thorax . 3 1b 1a 1c

2a Eyes round, thoracic legs of approximately the same length .3 2b Eyes in two parts with a constriction between the lobes, one or two pair of thoracic legs very elongated .8 2a 2b

2a Eyes round, thoracic legs of approximately the same length .3 2b Eyes in two parts with a constriction between the lobes, one or two pair of thoracic legs very elongated .8 2a 2b

3a A full complement of eight thoracic legs .Bentheuphausia amblyops 3b Eight thoracic leg extremely minute. Seventh thoracic leg smaller than sixth but the same shape and with the number of segments (six) .Thysanopoda 樱磷虾 3c Eight thoracic leg extremely minute and seventh thoracic leg with only two segments or reduced to a very small process .4 3b 3c 3c

3a A full complement of eight thoracic legs .Bentheuphausia amblyops 3b Eight thoracic leg extremely minute. Seventh thoracic leg smaller than sixth but the same shape and with the number of segments (six) .Thysanopoda 樱磷虾 3c Eight thoracic leg extremely minute and seventh thoracic leg with only two segments or reduced to a very small process .4 3b 3c 3c