Disporella guada sp. nov., an erect-ramose rectangulate cyclostome (Bryozoa, Stenolaemata) from the Caribbean Sea: convergent evolution in bryozoan colony morphology
Paul D. TAYLOR et al.
1-18, Published on 27 September 2021, art. 773 (1)
Rare, deep-water and similar: revision of Sibogasyrinx (Conoidea: Cochlespiridae)
Yuri I. KANTOR & Nicolas PUILLANDRE
19-60, Published on 28 September 2021, art. 773 (19) 
The spider genus Medionops Sánchez-Ruiz & Brescovit (Araneae: Caponiidae) in Colombia, with the description of four new species
MARTÍNEZ  Leonel et al.
61-79, Published on 29 September 2021, art. 773 (61) 
Simulium (Trichodagmia) (Diptera, Simuliidae) phylogeny revisited: the Neotropical and Afrotropical connection
Óscar S. MOLINA & Leonardo H. GIL-AZEVEDO
80-119, Published on 30 September 2021, art. 773 (80) 
Pseudopolydora (Annelida: Spionidae) from the Arabian Gulf, Kuwait
Vasily I. Radashevsky et al.
120-168, Published on 01 October 2021, art. 773 (120) 
Echinoderes xiphophorus sp. nov. – the first deep-water representative of Echinoderidae in the Sea of Japan (Kinorhyncha: Cyclorhagida)
Andrey V. ADRIANOV & Anastassya S. MAIOROVA
169-186, Published on 04 October 2021, art. 773 (169) 
