ABSTRACT ........................................................ 9
RÉSUMÉ DÉVELOPPÉ ............................................... 11
INTRODUCTION ................................................... 13
GENERAL CLASSIFICATION ......................................... 15
Class Automedusa Lameere, 1920 emend, (see Bouillon &
Boero 2000) ................................................. 15
Class Hydroidomedusa Claus, 1877 emend, (see Bouillon &
Boero 2000) ................................................. 15
Class Polypodiozoa Raikova, 1988 ............................ 16
GENERAL MORPHOLOGY AND HISTOLOGY OF POLYPS AND MEDUSAE ......... 19
Hydroids .................................................... 19
Medusae ..................................................... 42
General siphonophoran structure ............................. 57
DEVELOPMENT .................................................... 63
Life cycle .................................................. 63
Sexual reproduction ......................................... 63
Asexual reproduction ........................................ 75
DIAGNOSTIC CHARACTERS .......................................... 83
Diagnostic characters and character states to describe
Medusae ..................................................... 83
Diagnostic characters and character states to describe
Polyps ...................................................... 85
Diagnostic characters and character states to describe
Siphonophores ............................................... 88
SIMPLIFIED KEY FOR IDENTIFICATION OF HYDROZOA SUB-CLASSES ...... 89
For hydroids ................................................ 89
Key for identification of pelagic Hydrozoa .................. 89
Diagnostic characters and character states to describe
Siphonophores ............................................... 90
OUTLINE CLASSIFICATION ......................................... 91
DIAGNOSES AND KEYS OF THE FAMILIES AND GENERA .................. 95
Class Auto medusa ........................................... 95
Subclass Actinulidae Swedmark and Teissier, 1959 ......... 95
Subclass Narcomedusae Haeckel, 1879 ...................... 96
Subclass Trachymedusae Haeckel, 1866 (1879) ............. 104
Class Hydroidomedusa: Claus, 1877 emend, (see Bouillon &
Boero 2000) ................................................ 121
Subclass Anthomedusae Haeckel, 1879 ..................... 122
Subclass Laingiomedusae Bouillon, 1978 .................. 271
Subclass Leptomedusae Haeckel, 1866 (1879) .............. 272
Subclass Limnomedusae Kramp, 1938 ....................... 424
Subclass Siphonophorae Eschscholtz, 1829 ................ 440
Class Polypodiozoa Raikova, 1988 ........................... 484
COLLECTION OF MATERIAL ........................................ 485
FIXATION AND PRESERVATION OF THE MATERIAL ..................... 487
ACKNOWLEDGEMENTS .............................................. 489
REFERENCES .................................................... 491
GLOSSARY ...................................................... 529
INDEX ......................................................... 549
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