1. Phylogenetic relationships in Stephanopinae: systematics of Stephanopis and Sidymella based on morphological characters (Araneae: Thomisidae)

   • Miguel Machado
   • Renato Augusto Teixeira

   Original Article 03 January 2021 Pages: 281 - 313

   

2. Correction to: Phylogenetic relationships in Stephanopinae: systematics of Stephanopis and Sidymella based on morphological characters (Araneae: Thomisidae)

   • Miguel Machado
   • Renato Augusto Teixeira

   Correction 05 February 2021 Pages: 315 - 315

3. The specialized thoracic skeletomuscular system of the myrmecophile Claviger testaceus (Pselaphinae, Staphylinidae, Coleoptera)

   • Xiao-Zhu Luo
   • Paweł Jałoszyński
   • Rolf Georg Beutel

   Original Article Open access 02 February 2021 Pages: 317 - 335

   

4. A new piece in the puzzle for the riverine slugs of the Acochlidiidae (Gastropoda: Panpulmonata: Acochlidimorpha) helps tracing steps of their freshwater invasion

   • Bastian Brenzinger
   • Matthias Glaubrecht
   • Timea P. Neusser

   Original Article Open access 24 February 2021 Pages: 337 - 359

   

5. Comparative anatomy of the larvae of argid sawflies (Hymenoptera: Argidae): a phylogenetic approach

   • Leonardo A. Malagon-Aldana
   • Akihiko Shinohara
   • Lars Vilhelmsen

   Original Article 24 February 2021 Pages: 361 - 392

   

6. Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

   • Khadija Boulaassafer
   • Mohamed Ghamizi
   • Diana Delicado

   Original Article 17 March 2021 Pages: 393 - 420

   

7. Molecular and morphological variation among the European species of the genus Aphidius Nees (Hymenoptera: Braconidae: Aphidiinae)

   • Ana Mitrovski-Bogdanović
   • Milana Mitrović
   • Željko Tomanović

   Original Article 19 March 2021 Pages: 421 - 436

   

8. Genetic analysis of dicyemid infrapopulations suggests sexual reproduction and host colonization by multiple individuals is common

   • Marie Drábková
   • Tereza Flegrová
   • Jan Štefka

   Original Article 10 April 2021 Pages: 437 - 446

   

9. High species diversity of fish tapeworms in congeneric hosts in Africa: revision of Monobothrioides (Cestoda: Caryophyllidea), including description of two new species and molecular phylogeny

   • Tomáš Scholz
   • Jan Brabec
   • Miloslav Jirků

   Original Article 25 May 2021 Pages: 447 - 466

   

10. Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana

    • Julian Bibermair
    • Andrew N. Ostrovsky
    • Thomas Schwaha

    Original Article Open access 17 June 2021 Pages: 467 - 490

    

11. Phylogenetic approach redefines Plistonax (Coleoptera, Cerambycidae, Lamiinae) with new combinations and a new genus of flat-faced long-horned beetles

    • José O. Silva Júnior
    • Kirstern L. F. Haseyama
    • Diego de S. Souza

    Original Article 29 May 2021 Pages: 491 - 520