1. Two evolutionary units on the South American razor clam Ensis macha (Bivalvia: Pharidae): genetic and morphometric evidence

   • Federico Márquez
   • Berenice Trovant
   • Joaquín Vierna

   Original Article 22 May 2020 Pages: 331 - 344

   

2. Sky island diversification in the Merodon rufus group (Diptera, Syrphidae)—recent vicariance in south-east Europe

   • Snežana Radenković
   • Ante Vujić
   • Theodora Petanidou

   Original Article 25 May 2020 Pages: 345 - 368

   

3. Dugesia hepta and Dugesia benazzii (Platyhelminthes: Tricladida): two sympatric species with occasional sex?

   • Daniel Dols-Serrate
   • Laia Leria
   • Marta Riutort

   Original Article 29 May 2020 Pages: 369 - 386

   

4. A new species rises from beneath Florida: molecular phylogenetic analyses reveal cryptic diversity among the metapopulation of Crangonyx hobbsi Shoemaker, 1941 (Amphipoda: Crangonyctidae)

   • Andrew G. Cannizzaro
   • Donna Balding
   • Thomas R. Sawicki

   Original Article 03 June 2020 Pages: 387 - 404

   

5. Integrative biodiversity inventory of ants from a Sicilian archipelago reveals high diversity on young volcanic islands (Hymenoptera: Formicidae)

   • Sämi Schär
   • Mattia Menchetti
   • Roger Vila

   Original Article 06 June 2020 Pages: 405 - 416

   

6. Morphology and life cycle of an epiphytic pherusellid ctenostome bryozoan from the Mediterranean Sea

   • Sebastian Decker
   • Andreas Wanninger
   • Thomas Schwaha

   Original Article Open access 11 June 2020 Pages: 417 - 437

   

7. Evolutionary biogeography of the freshwater fish family Anablepidae (Teleostei: Cyprinodontiformes), a marine-derived Neotropical lineage

   • Augusto Frota
   • Juan J. Morrone
   • Weferson J. da Graça

   Original Article 19 June 2020 Pages: 439 - 449

   

8. The evolution of the mouthpart structures in the Eucraniini (Coleoptera, Scarabaeidae)

   • Claudia Palestrini
   • Enrico Barbero
   • Angela Roggero

   Original Article 20 June 2020 Pages: 451 - 465

   

9. Insights into mud dragon morphology (Kinorhyncha, Allomalorhagida): myoanatomy and neuroanatomy of Dracoderes abei and Pycnophyes ilyocryptus

   • Maria Herranz
   • Martin V. Sørensen
   • Katrine Worsaae

   Original Article 01 July 2020 Pages: 467 - 493

   

10. Correction to: Insights into mud dragon morphology (Kinorhyncha, Allomalorhagida): myoanatomy and neuroanatomy of Dracoderes abei and Pycnophyes ilyocryptus

    • Maria Herranz
    • Martin V. Sørensen
    • Katrine Worsaae

    Publisher Correction 13 July 2020 Pages: 495 - 495

11. Phylogenetic analysis of the tribe Neanurini questions tribal classification of the subfamily Neanurinae (Collembola: Neanuridae)

    • Adrian Smolis
    • Grzegorz Paśnik

    Original Article Open access 03 July 2020 Pages: 497 - 509

    

12. Strong phylogenetic constraint on transition metal incorporation in the mandibles of the hyper-diverse Hymenoptera (Insecta)

    • Carlo Polidori
    • Alberto Jorge
    • José Luis Nieves-Aldrey

    Original Article 04 July 2020 Pages: 511 - 526

    

13. Ancient incomplete lineage sorting of Hyles and Rhodafra (Lepidoptera: Sphingidae)

    • Anna K. Hundsdoerfer
    • Ian J. Kitching

    Original Article Open access 12 July 2020 Pages: 527 - 536

    

14. The uncinate viscidium and floral setae, an evolutionary innovation and exaptation to increase pollination success in the Telipogon alliance (Orchidaceae: Oncidiinae)

    • Carlos Martel
    • Kurt M. Neubig
    • Manfred Ayasse

    Original Article 08 August 2020 Pages: 537 - 550