Global fine-resolution data on springtail abundance and community structure.

Springtails (Collembola) inhabit soils from the Arctic to the Antarctic and comprise an estimated ~32% of all terrestrial arthropods on Earth. Here, we present a global, spatially-explicit database on springtail communities that includes 249,912 occurrences from 44,999 samples and 2,990 sites. These data are mainly raw sample-level records at the species level collected predominantly from private archives of the authors that were quality-controlled and taxonomically-standardised. Despite covering all continents, most of the sample-level data come from the European continent (82.5% of all samples) and represent four habitats: woodlands (57.4%), grasslands (14.0%), agrosystems (13.7%) and scrublands (9.0%). We included sampling by soil layers, and across seasons and years, representing temporal and spatial within-site variation in springtail communities. We also provided data use and sharing guidelines and R code to facilitate the use of the database by other researchers. This data paper describes a static version of the database at the publication date, but the database will be further expanded to include underrepresented regions and linked with trait data.

Three new Oligaphorura species (Collembola: Onychiuridae) of the marcuzzii-group from the Caucasus.

Three new species of the genus Oligaphorura, namely O. montivaga sp. nov., O. tatianae sp. nov., and O. igori sp. nov., are described based on materials from different parts of the Caucasus. All of them belong to the marcuzzii-group of the genus because of the presence of 4+4 pso at the antennal base and the absence of anal spines. They seem to be especially similar to O. kremenitsai Shvejonkova Potapov and O. humicola Shvejonkova Potapov, two congeners with the same uncommon type of the labium (ABD), but are distinguished by the number of dorsal pseudocelli (42/144/33354 in O. kremenitsai, 42/133/33354 in O. humicola, 43/144/44354 in O. montivaga sp. nov., 43/133/44(5)364 in O. tatianae sp. nov. and 43/133/44354 in O. igori sp. nov.). Apart from this, all new species have the schoetti-type furcal area and more distal setae on the tibiotarsi (11 in O. montivaga sp. nov. and O. tatianae sp. nov. and 9 in O. igori sp. nov.) whereas both O. kremenitsai and O. humicola show the humicola-type furcal area and only 6 distal setae on the tibiotarsi. A table with the main diagnostic features of Oligaphorura species of the marcuzzii-group is also given.

Two new species of the genus Psyllaphorura/ (Collembola: Onychiuridae) from the east of European Russia.

Two new species of the genus Psyllaphorura Bagnall, 1948, namely P. silvestris sp. nov. and P. pseudopodis sp. nov., are described from the European Russia. The former species can be compared to the Nearctic P. obesa (Mills, 1934) which has almost the same number of dorsal pseudocelli, but differs in having compound vesicles in PAO. Psyllaphorura pseudopodis sp. nov. is similar to P. altaica Weiner, Stebaeva Kaprus', 2019 recently described from the Altai Mountains, southern Siberia. Both these species have the same number and arrangement of the cephalic pseudocelli. Nonetheless, P. pseudopodis sp. nov. can be distinguished by the absence of pseudocelli on Abd. IV, only 2+2 dental setae and a shorter unguiculus. Besides this, P. pseudopodis sp. nov. is unique in the presence of a pair of ventral swellings on the fourth abdominal segment. Based on a revision of the types, P. sensillifera (Martynova, 1981) is considered a senior synonym of P. raoheensis Sun Wu, 2013. Taxonomic notes on the most important diagnostic characters of the genus are given, as well as a key and a table summarizing these characters in all Psyllaphorura species known in the World so far.

Subdivision of the tribe Oligaphorurini in the light of new and lesser known species from North-East Russia (Collembola, Onychiuridae, Onychiurinae).

The paper is devoted to a taxonomic review of Oligaphorurini from the north-eastern part of Palaearctic. Two new species, i.e. Oligaphoruraambigua sp. n. and Oligaphoruraduocellata sp. n., are described. Four species, Oligaphoruranataliae (Fjellberg, 1987), Oligaphorurainterrupta (Fjellberg, 1987), Oligaphorurapingicola (Fjellberg, 1987), and Micraphoruraalnus (Fjellberg, 1987), are redescribed on base of the types and new material, and remarks on other species known for the region, Oligaphoruragroenlandica (Tullberg, 1876), Oligaphoruraursi (Fjellberg, 1984), Oligaphoruraaborigensis (Fjellberg, 1987), and Micraphoruraabsoloni (Börner, 1901), are given to clarify their generic affiliation. Finally, merits and disadvantages of the current subdivision of the tribe are discussed and a key to the northern species of the tribe is provided.

New Palaearctic species of the tribe Thalassaphorurini Pomorski, 1998 (Collembola, Onychiuridae).

The paper is devoted to a taxonomic revision of the genus Sensillonychiurus Pomorski & Sveenkova, 2006. Five new species of this genus, i.e. Sensillonychiurus mirussp. n., Sensillonychiurus taimyrensissp. n., Sensillonychiurus vegaesp. n., Sensillonychiurus vitimicussp. n., and Sensillonychiurus amuricussp. n., as well as three new species of the related genus Allonychiurus Yoshii, 1995, i.e. Allonychiurus subvolinensissp. n., Allonychiurus elikoniussp. n., and Allonychiurus unisetosussp. n. are being described from various regions of Eurasia. The diagnoses of both genera are amended to include described species. Two genera, Tantulonychiurus Pomorski, 1996 and Thibaudichiurus Weiner, 1996, are treated as junior synonyms of the genus Allonychiurus. Agraphorura eisi (Rusek, 1976) is transferred to Sensillonychiurus; Tantulonychiurus volinensis (Szeptycki, 1964) and Tantulonychiurus asiaticus Babenko, 2007 to Allonychiurus. A review of morphological peculiarities of Sensillonychiurus is performed, comparisons with the other genera of Thalassaphorurini given, and a key to the known species provided.