1. Kinetid structure in larval and adult stages of the demosponges Haliclona aquaeductus (Haplosclerida) and Halichondria panicea (Suberitida)

   • Agniya M. Sokolova
   • Igor R. Pozdnyakov
   • Sergey A. Karpov

   Original Paper 18 February 2019 Pages: 171 - 184

   

2. Spermatological characteristics of Siphoderina aloysiae (Digenea, Cryptogonimidae), an intestinal parasite of Sciaena umbra (Teleostei, Sciaenidae)

   • Hichem Kacem
   • Jordi Miquel

   Original Paper 14 January 2019 Pages: 185 - 192

   

3. Comparative muscular morphology in Archinemertea (Nemertea: Palaeonemertea)

   • Alexei V. Chernyshev
   • Hiroshi Kajihara

   Original Paper 20 March 2019 Pages: 193 - 207

   

4. Formation and structure of paleae and chaetal arrangement in chrysopetalidae (Annelida)

   • Ekin Tilic
   • Schabnam Sermelwall
   • Thomas Bartolomaeus

   Original Paper 31 January 2019 Pages: 209 - 220

   

5. First ultrastructural evidence of placental nutrition in a ctenostome bryozoan: example of Amathia verticillata

   • Thomas Schwaha
   • Martin Moosbrugger
   • Andrew N. Ostrovsky

   Original Paper Open access 19 March 2019 Pages: 221 - 232

   

6. Unusual penis morphology among cosmetid harvestmen (Arachnida: Opiliones) from Mesoamerica

   • Daniel N. Proud
   • Victor R. Townsend Jr.

   Original Paper 16 January 2019 Pages: 233 - 247

   

7. Morphology of putative chemosensory setae in males of the spider genus Ariadna Audouin (Araneae, Synspermiata, Segestriidae)

   • André Marsola Giroti
   • Antonio Domingos Brescovit

   Original Paper 26 March 2019 Pages: 249 - 263

   

8. An integrated analysis of hyperspectral and morphological data of cicada ovipositors revealed unexplored links to specific oviposition hosts

   • Zehai Hou
   • Haiying Zhong
   • Cong Wei

   Original Paper 30 January 2019 Pages: 265 - 276

   

9. Interspecific size- and sex-related variation in the cranium of European brown frogs (Genus Rana)

   • Jelena Krstičić Račković
   • Nataša Tomašević Kolarov
   • Tanja Vukov

   Original Paper 25 March 2019 Pages: 277 - 286

   

10. Are baculum size and allometry a response to post-copulatory sexual selection in promiscuous males of the house mouse?

    • Alexander Csanády
    • Silva Duranková
    • Erika Labancová

    Original Paper 13 February 2019 Pages: 287 - 296