文档介绍：Chapter 5 Coelenterata
浮游水母类的一般形态、分类、生物学与经济意义
General features
two primary lays: outer ectoderm and inner endoderm
radial symmetry
Class Hydromedusae
Class Scyphomedusae
§ Morphology Hydromedusae
External features
Form:polypoid and medusoid
Morphology
umbrella: exumbrella and subumbrella
Velum and pseudovelum
Manubrium and mouth lips
Tenacle: marginal and oral tentacles
Nematocyst:
morphology: operculum, capsule and thread
classification
Internal features
Gastrovascular System:
gastrovascular-cavity
Muscular System:radial and circular fibers
Nervous and Sensory Cell:
ganglion cell
neurosecretory cell
√ an
pigment cell
statocyst:
open marginal vesicle
closed marginal vesicle
free marginal sensoty club
enclosed marginal sensoty club
Reproduction:
dioecious,gonads situated on the radial canals or inside stomach
§ Class Hydromedusae
Hydromedusae
>2000 species,6 orders:
velum
presence or absence ocelli and statocysts
position of gonads
type of life cycle
(一) Order Anthomedusae
本目有22科,介绍常见4个科。
1、Family Tubulariidae
Euphysora
2、Family Bougainvilliidae
Koellikerina
3、Fmaily Velellidae:one genus,one species
4、Family Randeidae
Leuckartiara 厦门隔膜水母
(二) Order Leptomedusae
本目12科,我录9科,介绍常见4科。
1、Family Campanulariidae:
Phialidium: P. chengshanense
Obelia
2、Family Eirenidae:
Eirene
3、Family Eutimidae
Eutima
4、Family Aequoreidae
Aequorea