| Morphological investigations of microdrile oligochaetes (Annelida, Clitellata) using scanning electron microscopy | Carlos CARAMELO,Enrique MARTÍNEZ-ANSEMIL | 1–14 |
| New records of semiaquatic species Marionina (Clitellata, Enchytraeidae) from Japan, with a description of Marionina biwaensis sp. nov. | Takaaki TORII | 15–24 |
| Preliminary studies on aquatic Oligochaeta in and around Chennai, Tamil Nadu, India | Mohammed İbrahim NAVEED | 25–37 |
| A long-term eutrophication process observed from the changes in the horizontal distribution of profundal oligochaete fauna in mesotrophic-eutrophic Lake Kawaguchi, Japan | Kimio HIRABAYASHI,Keiko OGA,Kazuya YOSHIZAWA,Norihiko YOSHIDA,Futaba KAZAMA | 39–46 |
| Freshwater oligochaetes (Oligochaeta, Clitellata, Annelida) of North Pribaikalye (East Siberia, Russia) | İrina A. KAYGORODOVA,Piet F. M. VERDONSCHOT,Lyubov S. KRAVTSOVA | 47–58 |
| Distribution of aquatic oligochaetes (Annelida, Clitellata) of high-elevation lakes in the Eastern Black Sea Range of Turkey | Seray YILDIZ,Murat ÖZBEK,Mustafa Ruşen USTAOĞLU,Haşim SÖMEK | 59–74 |
| Distribution and diversity of aquatic Oligochaeta in small streams of the middle taiga | Maria BATURINA | 75–84 |
| Microtaxonomy of fragmenting Enchytraeus species using molecular markers, with a comment on species complexes in enchytraeids | Rut COLLADO,Eva HASS-CORDES,Rüdiger M. SCHMELZ | 85–94 |
| Phylogeny of basal descendants of cocoon-forming annelids (Clitellata) | Martin Lindsey CHRISTOFFERSEN | 95–119 |
| Profundal oligochaete assemblages in Palaearctic lakes | Tarmo TIMM | 121–131 |
| Checklist of Questidae (Clitellata) and Aeolosomatidae (Oligochaeta) from South America | Martin Lindsey CHRISTOFFERSEN | 133–138 |
| About the scientific names of paraphyletic taxa | Tarmo TIMM | 139–140 |
| A general review of parasitic Annelida (Hirudinea) recorded from different habitats and hosts in Turkey |