Two evolutionary units on the South American razor clam Ensis macha (Bivalvia: Pharidae): genetic and morphometric evidence Federico MárquezBerenice TrovantJoaquín Vierna Original Article 22 May 2020 Pages: 331 - 344
Sky island diversification in the Merodon rufus group (Diptera, Syrphidae)—recent vicariance in south-east Europe Snežana RadenkovićAnte VujićTheodora Petanidou Original Article 25 May 2020 Pages: 345 - 368
Dugesia hepta and Dugesia benazzii (Platyhelminthes: Tricladida): two sympatric species with occasional sex? Daniel Dols-SerrateLaia LeriaMarta Riutort Original Article 29 May 2020 Pages: 369 - 386
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. CannizzaroDonna BaldingThomas R. Sawicki Original Article 03 June 2020 Pages: 387 - 404
Integrative biodiversity inventory of ants from a Sicilian archipelago reveals high diversity on young volcanic islands (Hymenoptera: Formicidae) Sämi SchärMattia MenchettiRoger Vila Original Article 06 June 2020 Pages: 405 - 416
Morphology and life cycle of an epiphytic pherusellid ctenostome bryozoan from the Mediterranean Sea Sebastian DeckerAndreas WanningerThomas Schwaha Original Article Open access 11 June 2020 Pages: 417 - 437
Evolutionary biogeography of the freshwater fish family Anablepidae (Teleostei: Cyprinodontiformes), a marine-derived Neotropical lineage Augusto FrotaJuan J. MorroneWeferson J. da Graça Original Article 19 June 2020 Pages: 439 - 449
The evolution of the mouthpart structures in the Eucraniini (Coleoptera, Scarabaeidae) Claudia PalestriniEnrico BarberoAngela Roggero Original Article 20 June 2020 Pages: 451 - 465
Insights into mud dragon morphology (Kinorhyncha, Allomalorhagida): myoanatomy and neuroanatomy of Dracoderes abei and Pycnophyes ilyocryptus Maria HerranzMartin V. SørensenKatrine Worsaae Original Article 01 July 2020 Pages: 467 - 493
Correction to: Insights into mud dragon morphology (Kinorhyncha, Allomalorhagida): myoanatomy and neuroanatomy of Dracoderes abei and Pycnophyes ilyocryptus Maria HerranzMartin V. SørensenKatrine Worsaae Publisher Correction 13 July 2020 Pages: 495 - 495
Phylogenetic analysis of the tribe Neanurini questions tribal classification of the subfamily Neanurinae (Collembola: Neanuridae) Adrian SmolisGrzegorz Paśnik Original Article Open access 03 July 2020 Pages: 497 - 509
Strong phylogenetic constraint on transition metal incorporation in the mandibles of the hyper-diverse Hymenoptera (Insecta) Carlo PolidoriAlberto JorgeJosé Luis Nieves-Aldrey Original Article 04 July 2020 Pages: 511 - 526
Ancient incomplete lineage sorting of Hyles and Rhodafra (Lepidoptera: Sphingidae) Anna K. HundsdoerferIan J. Kitching Original Article Open access 12 July 2020 Pages: 527 - 536
The uncinate viscidium and floral setae, an evolutionary innovation and exaptation to increase pollination success in the Telipogon alliance (Orchidaceae: Oncidiinae) Carlos MartelKurt M. NeubigManfred Ayasse Original Article 08 August 2020 Pages: 537 - 550