1. A review on usnic acid, an interesting natural compound

   • Moreno Cocchietto
   • Nicola Skert
   • Gianni Sava

   Review Article Pages: 137 - 146

2. Ecology and ecophysiology of tree stems: corticular and wood photosynthesis

   • H. Pfanz
   • G. Aschan
   • M. Loose

   Review Article Pages: 147 - 162

3. A novel function for the pineal organ in the control of swim depth in the Atlantic halibut larva

   • Iñigo Novales Flamarique

   Short Communication Pages: 163 - 166

4. Feminization of genetic males by a symbiotic bacterium in a butterfly, Eurema hecabe (Lepidoptera: Pieridae)

   • Masato Hiroki
   • Yoshiomi Kato
   • Kazuki Miura

   Short Communication Pages: 167 - 170

5. The flavo-enzyme xanthine oxidase is under circadian control in the marine alga Gonyaulax

   • Tzu-Shing Deng
   • Till Roenneberg

   Short Communication Pages: 171 - 175

6. Docile sitters and active fighters in paper wasps: a tale of two queens

   • Sujata P. Kardile
   • Raghavendra Gadagkar

   Short Communication Pages: 176 - 179

7. A new giant pterosaur with a robust skull from the latest Cretaceous of Romania

   • E. Buffetaut
   • D. Grigorescu
   • Z. Csiki

   Short Communication Pages: 180 - 184

8. Transferability of HIV by arthropods supports the hypothesis about transmission of the virus from apes to man

   • Manfred Eigen
   • Werner J. Kloft
   • Gerhard Brandner

   Short Communication Pages: 185 - 186