HYDROBIOLOGIA Volume 419, Nos. 1-3, 1 February 2000 Theme Evolutionary Biology and Ecology of Ostracoda Guest Editors David J. Horne & Koen Martens Preface Ostracoda and the four pillars of evolutionary wisdom K. Martens, D. J. Horne Keynote Paper Open questions in evolutionary ecology: do ostracods have the answers? R.K. Butlin, P. Menozzi Part 1. Morphological Evolution Trunk segmentation of some podocopine lineages in Ostracoda A. Tsukagoshi, A.R. Parker The ontogeny of the cypridid ostracod Eucypris virens (Jurine, 1820) (Crustacea, Ostracoda) R.J. Smith, K. Martens Ontogenetic changes in the carapace shape of the non-marine ostracod Eucypris virens (Jurine) A. Baltanas, M. Otero, L. Arqueros, G. Rossetti, V. Rossi Multifunctions of the upper lip and a ventral reflecting organ in a bioluminescent ostracod Vargula hilgendorfii (Miller, 1890) K. Abe, T. Ono, K. Yamada, N. Yamamura, K. Ikuta Factors affecting the divergence of mate recognition systems in the Limnocytherinae (Crustacea, Ostracoda) K. Martens 83-101 Part 2. Evolutionary History — the Fossil Record An example of intralacustrine evolution at an early stage: the freshwater ostracods of the Miocene crater lake of Steinheim (Germany) H. Janz 103-117 The origins of modern nonmarine ostracod faunas: evidence from the Late Cretaceous and Early Palaeogene of Mongolia Khand Yo 119-124 The evolutionary history of Late Permian Darwinulocopina Sohn, 1988 (Ostracoda) from the Russian Plate 1.1. Molostovskaya 125-130 Vi Part 3. Ecology and Palaeoecology Variable noding in Cyprideis torosa (Ostracoda, Crustacea): an overview, experimental results and a model from Catastrophe Theory D. van Harten 131-139 The effect of temperature on shell size and growth rate in Krithe praetexta praetexta (Sars) S. Majoran, S. Agrenius, M. Kucera 141-148 The life history and culturing of Xestoleberis hanaii (Crustacea, Ostracoda) N. Ikeya, M. Kato 149-159 Factors influencing intraspecific variation and polymorphism in marine podocopid Ostracoda, with particular reference to Tertiary species from southeastern Australia J. V. Neil 161-180 Trend, signal and noise in the ecology of Ostracoda: information from rare species in low- diversity assemblages J. M. Slack, R. L. Kaesler, M. Kontrovitz 181-189 Reproductive strategy of an isopod Onisocryptus ovalis, parasitizing a bioluminescent myodocope ostracod Vargula hilgendorfii K. Abe, J. Horiuchi 191-197