1. News and Perspectives

   • Toshisada Nishida

   Editorial 25 June 2009 Pages: 195 - 195

2. Factors underlying party size differences between chimpanzees and bonobos: a review and hypotheses for future study

   • Takeshi Furuichi

   Review Article 08 April 2009 Pages: 197 - 209

   

3. Estimation of African apes’ body size from postcranial dimensions

   • Markku Niskanen
   • Juho-Antti Junno

   Original Article 17 February 2009 Pages: 211 - 220

   

4. Buccal dental microwear variability in extant African Hominoidea: taxonomy versus ecology

   • Jordi Galbany
   • Ferran Estebaranz
   • Alejandro Pérez-Pérez

   Original Article 19 March 2009 Pages: 221 - 230

   

5. Vocalisations of wild common marmosets are influenced by diurnal and ontogenetic factors

   • Bruna Martins Bezerra
   • Antonio da Silva Souto
   • Lewis George Halsey

   Original Article 18 February 2009 Pages: 231 - 237

   

6. Interspecific primate associations in Amazonian flooded and unflooded forests

   • Torbjørn Haugaasen
   • Carlos A. Peres

   Original Article 26 February 2009 Pages: 239 - 251

   

7. Behavioral and hormonal response of common marmosets, Callithrix jacchus, to two environmental conditions

   • Maricele Nascimento Barbosa
   • Maria Teresa da Silva Mota

   Original Article 11 March 2009 Pages: 253 - 260

   

8. Geographic distribution and population characteristics of the endangered white-fronted spider monkey (Ateles marginatus) on the lower Tapajós River in central Brazilian Amazonia

   • André L. Ravetta
   • Stephen F. Ferrari

   Original Article 12 May 2009 Pages: 261 - 268

   

9. Tool use in wild spider monkeys (Ateles geoffroyi)

   • Stacy M. Lindshield
   • Michelle A. Rodrigues

   Short Communication 16 April 2009 Pages: 269 - 272

10. Hand-clapping as a communicative gesture by wild female swamp gorillas

    • Ammie K. Kalan
    • Hugo J. Rainey

    Short Communication 17 February 2009 Pages: 273 - 275

11. Two cases of mother–infant cannibalism in orangutans

    • David Fenwick Dellatore
    • Corri D. Waitt
    • Ivona Foitova

    Short Communication 26 March 2009 Pages: 277 - 281

12. Nobuo Masataka (Ed.): The origins of language, unraveling evolutionary forces

    • Tobias Riede

    Book Review 04 March 2009 Pages: 283 - 284

13. Bradley J. Adams and John E. Byrd (eds.): Recovery, analysis, and identification of commingled human remains

    • Osamu Kondo

    Book Review 11 March 2009 Pages: 285 - 286

14. Richard Wrangham, Elizabeth Ross (eds.): Science and conservation in African forests: the benefits of long-term research

    • Noko Kuze

    Book Review 19 March 2009 Pages: 287 - 289

15. Sex differences in play behavior in juvenile tufted capuchin monkeys (Cebus apella)

    • Annika Paukner
    • Stephen J. Suomi

    Erratum 17 June 2009 Pages: 291 - 291