1. An integrative study of Anemonia viridis (Forsskål, 1775) and Aiptasia couchii (Cocks, 1851) (Cnidaria: Anthozoa) from the North Adriatic Sea

   • S. Arossa
   • C. Cerrano
   • C. G. Di Camillo

   Original Paper 04 October 2021 Pages: 421 - 435

   

2. Ultrastructure and functional morphology of the dorsal organs in Scoloplos armiger (Annelida, Sedentaria, Orbiniida)

   • Jana Sophia Buhre
   • Günter Purschke

   Original Paper Open access 20 October 2021 Pages: 437 - 452

   

3. New data on the ultrastructure of the proboscis in females of Bonellia viridis (Annelida: Bonellinae)

   • Petr Kuznetsov
   • Alexander Ereskovsky
   • Elena Temereva

   Original Paper 27 September 2021 Pages: 453 - 468

   

4. A picture is worth a thousand words: novel photographic evidence on the anatomy of the digestive system of three shipworm species (Bivalvia, Teredinidae)

   • L. M. S. Borges
   • B. Pfeifer
   • B. Altermark

   Original Paper 28 September 2021 Pages: 469 - 485

   

5. Sensory equipment and adaptations to the fire habitat of the antennae of the Australian ´firebeetle´ Merimna atrata (Coleoptera; Buprestidae)

   • Anke Schmitz
   • Helmut Schmitz

   Original Paper Open access 20 October 2021 Pages: 487 - 504

   

6. Brittlestars with a bite: a new kind of pedicellaria in echinoderms

   • Richard L. Turner
   • Jason M. Boucher
   • Nicole W. Becker

   Original Paper 30 September 2021 Pages: 505 - 525

   

7. The pericardium of Oikopleura dioica (Tunicata, Appendicularia) contains two distinct cell types and is rotated by 90 degrees to the left

   • Mai-Lee Van Le
   • Maria Novosolov
   • Thomas Stach

   Original Paper Open access 04 September 2021 Pages: 527 - 537

   

8. A comparative study of cranial osteogenesis in turtles: implications for the diversification of skull morphology

   • Masayoshi Tokita
   • Takumi Watanabe
   • Chiyo Kitayama

   Original Paper 26 October 2021 Pages: 539 - 554