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From October 16th – November 12th 1998, a multinational group of researchers was involved in the scientific cruise no. SO 136 of the German research vessel RV `Sonne'. The voyage began in Wellington/New Zealand and ended in Hobart/Tasmania. During this cruise, from 37 stations a total of 167 samples were recovered along transsects on the Challenger and Campbell Plateaux, the Emerald Basin and the Tasman Rise.
With respect to the ostracod faunas, the epi-benthic sledge produced samples in which both diversity and specimen numbers were high. Because the opportunity to work on such a large and diverse extant deep-sea ostracod fauna is rare, the authors made the decision to work exclusively on samples which had been recovered east of the Emerald Basin [Challenger and Campbell Plateaux; the samples west of the Emerald Basin are the subject of a PhD Thesis study (Munich University)]. In total, some 150 species of about 40 genera have been discriminated.
The main objective of this study was to focus on those ostracod species for which large numbers and/or soft appendages were available. This has resulted in the discrimination of a total of 92 species from 31 genera. 42 of these species are introduced as new to science (46 % of the total number of species). Furthermore, one family, eight genera and one subgenus are introduced as new taxa. The phylogenetic and biogeographic implications of the soft anatomies and distribution of some families are also discussed in detail (Trachyleberididae and Hemicytheridae especially).
Introduction 2
Preamble 2
Physiography and regional setting 3
Water masses and circulation 6
Methods 10
Epilogue 11
Repository 13
Systematics 13
Order Podocopida G.W. MÜLLER 1894 13
Suborder Platycopina SARS 1866 13
Superfamily Cytherellacea SARS 1866 13
Family Cytherellidae SARS 1866 13
Genus Cytherella JONES 1849 13
Genus Grammcythella n. gen. 15
Genus Inversacytherella n. gen. 16
Aspects of platycopine ecology 17
The platycopine genital lobes and hemipenes 19
Suborder Podocopina SARS 1866 20
Superfamily Cypridacea BAIRD 1845 20
Family Trachyleberididae SYLVESTER-BRADLEY 1948 20
Genus Trachyleberis BRADY 1898 20
Genus Glencoeleberis n. gen. 23
Genus Taracythere AYRESS 1995 26
Genus Abyssophilos n. gen. 31
Genus Legitimocythere COLES & WHATLEY 1989 33
Genus Henryhowella PURI 1957 38
Genus Apatihowella n. gen. 39
Genus Apatihowella (Apatihowella) n. gen., n. subgen. 40
Genus Apatihowella (Fallacihowella) n. gen., n. subgen. 43
Genus Ambocythere VAN DEN BOLD 1957 45
Genus Clinocythereis AYRESS & SWANSON 1991 48
Genus Philoneptunus WHATLEY, MILLSON & AYRESS 1992 49
Problems of taxonomy and phylogeny in the Trachyleberididae 52
Family Hemicytheridae PURI 1953 54
Genus Bradleya HORNIBROOK 1952 54
Bradleyine evolution and biogeography 65
Genus Poseidonamicus BENSON 1972 69
Genus Harleya n. gen. 71
Family Cytheralisonidae n. fam. 72
Genus Cytheralison HORNIBROOK 1952 73
Genus Debissonia n. gen. 77
Conclusions 78
Family Uncertae sedis 79
Genus Bisulcocythere AYRESS & SWANSON 1991 79
Family Cytherideidae SARS 1925 79
Genus Rotundracythere MANDELSTAM 1958 79
Genus Pseudeucythere HARTMANN 1989 83
Family Macrocyprididae G.W. MÜLLER 1912 83
Genus Macroscapha MADDOCKS 1990 84
Genus Macropyxis MADDOCKS 1990 85
Genus Macrosarisa MADDOCKS 1990 89
Genus Macrocyprina MADDOCKS 1990 89
Family Bythocytheridae SARS 1926 92
Genus Miracythere HORNIBROOK 1952 92
Genus Bythoceratina HORNIBROOK 1952 94
Family Xestoleberididae Sars 1928 97
Genus Xestoleberis Sars 1866 97
Genus Foveoleberis Malz 1980 98
Acknowledgements 99
References 99
Plates 1-107 109
Appendix 325
Index of data for the TASQWA samples 325
Index of genera and species used and mentioned in the text 325
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