The high complexity of Micronetinae Hull, 1920 (Araneae, Linyphiidae) evidenced through ten new cave-dweller species from the Morocco
José Antonio BARRIENTOS et al.
1-29, Published on 23 January 2020, art. 42 (1)
On the taxonomic position of Phaenomenella Fraussen & Hadorn, 2006 (Neogastropoda, Buccinoidea) with description of two new species
Yuri I. KANTOR et al.
33-55, Published on 04 February 2020, art. 42 (3) 
The Paris Bloubok (Hippotragus leucophaeus (Pallas, 1766) [Bovidae]) and its provenance
Phylogeny of the genus Pinnixa White, 1846 (Crustacea, Brachyura, Pinnotheridae) and allies inferred from mitochondrial and nuclear molecular markers, with generic reassignment of twenty-one species
Emma PALACIOS THEIL & Darryl L. FELDER
85-103, Published on 03 March 2020, art. 42 (6) 
Three new species of Ischioscia Verhoeff, 1928 (Isopoda, Oniscidea, Philosciidae) from Serranía de Perijá, Andean Cordillera, Colombian Caribbean
Ivanklin Soares CAMPOS-FILHO et al.
115-130, Published on 24 March 2020, art. 42 (8) 
Botrylloides crystallinus n. sp., a new Botryllinae Adams & Adams, 1858 (Ascidiacea) from Mediterranean Sea
Anne BAY-NOUAILHAT et al.
131-138, Published on 31 March 2020, art. 42 (9) 
First record of the rare Wide-mouth flounder Kamoharaia megastoma (Kamohara, 1936) (Pleuronectiformes, Bothidae) from the western Indian Ocean collected during the ATIMO VATAE expedition to Madagascar “Deep South”
Mark W. LISHER et al.
151-157, Published on 14 April 2020, art. 42 (11) 
Rediscovery of Obeliscus agassizi Pilsbry, 1906 (Gastropoda, Subulinidae, Obeliscinae), annotated checklist of species of Obeliscus Beck, 1837 and first description of the anatomy for the genus
Sthefane D'ÁVILA et al.
159-172, Published on 21 April 2020, art. 42 (12) 
L’histoire de la description du squale bouclé Echinorhinus brucus (Bonnaterre, 1788) (Echinorhinidae) et la redécouverte des illustrations du type perdu
Samuel P. IGLÉSIAS & Frederik H. MOLLEN
173-193, Published on 28 April 2020, art. 42 (13) 
First fossil of the extant flat wasp genus Dissomphalus Ashmead, 1893 (Hymenoptera: Bethylidae: Pristocerinae)
Three new species of Raphitoma Bellardi, 1847 (Mollusca, Gastropoda, Raphitomidae) from Croatian waters (NE Adriatic Sea)
Jakov PRKIĆ et al.
215-238, Published on 26 May 2020, art. 42 (16) 
A revision of Carcinoplax abyssicola (Miers, 1885) and seven related species of Carcinoplax H. Milne Edwards, 1852, with the description of two new species and an updated key to the genus (Crustacea, Decapoda, Brachyura, Goneplacidae)
Additions to the Ant Fauna of Turkey (Hymenoptera, Formicidae)
New Brazilian Tafaliscina increase the diversity of this Neotropical cricket clade (Orthoptera: Grylloidea: Gryllidae: Oecanthinae: Paroecanthini)
Lucas Denadai de CAMPOS et al.
331-353, Published on 07 July 2020, art. 42 (19) 
Revision of Mediterranean and NE Atlantic Raphitomidae (Gastropoda, Conoidea) 8: The genus Leufroyia Monterosato, 1884
Riccardo GIANNUZZI-SAVELLI et al.
433-473, Published on 20 August 2020, art. 42 (22) 
Nomenclatural consequences of the Oculudentavis khaungraae case, with comments on the practice of ‘retraction’ of scientific publications
Annotated checklist of bats (Mammalia: Chiroptera) of Mount Cameroon, southwestern Cameroon
Aaron MANGA MONGOMBE et al.
483-514, Published on 24 September 2020, art. 42 (24) 
A response to Dubois (2020; Zoosystema 42 (23): 475-482)
‘Retraction’ of taxonomic papers: the meaning of the word ‘issued’ and related ones in zoological nomenclature
The Mediterranean species of Hornera Lamouroux, 1821 (Bryozoa, Cyclostomata): reassessment of H. frondiculata (Lamarck, 1816) and description of H. mediterranea n. sp.
List of amphibian species (Vertebrata, Tetrapoda) of Burkina Faso
Halamoussa Joëlle AYORO et al.
547-582, Published on 05 November 2020, art. 42 (28) 
A new fossil species of Trentepohlia (Diptera, Limoniidae) from the Dominican Miocene
Jorge MEDEROS et al.
583-592, Published on 24 November 2020, art. 42 (29) 
Checklist and taxonomic updates in grasshoppers (Orthoptera: Caelifera) of central and southwestern Tunisia with new records and a key for species identification
Haithem TLILI et al.
607-738, Published on 15 December 2020, art. 42 (31)
