Is Hrabeiella periglandulata (Annelida, "Polychaeta") the sister group of Clitellata? Evidence from an ultrastructural analysis of the dorsal pharynx in H. periglandulata and Enchytraeus minutus (Annelida, Clitellata) Günter Purschke Original Article 19 December 2002 Pages: 55 - 66
Sperm ultrastructure of Mantophasma zephyra (Insecta, Mantophasmatodea) Romano DallaiFrancesco FratiJoachim Adis Original Article 22 January 2003 Pages: 67 - 76
The development of the serotonergic and FMRF-amidergic nervous system in Antalis entalis (Mollusca, Scaphopoda) Andreas WanningerGerhard Haszprunar Original Article 15 March 2003 Pages: 77 - 85
Unique patterns of longitudinal body-wall musculature in the Acoela (Plathelminthes): the ventral musculature of Convolutriloba longifissura Robert GschwentnerJohann MuellerSeth Tyler Original Article 12 February 2003 Pages: 87 - 94
Experiments on anterior regeneration in Eurythoe complanata ("Polychaeta", Amphinomidae): reconfiguration of the nervous system and its function for regeneration Monika C. M. MüllerAndreas BerenzenWilfried Westheide Original Article 12 February 2003 Pages: 95 - 103