A history of study and new records of terrestrial enchytraeids (Annelida, Clitellata, Enchytraeidae) from the Russian Far East

Abstract

A list of terrestrial enchytraeids of the Russian Far East is compiled based on literature and extensive field data collected by the authors in 2019. A database has been created consisting of geographic coordinates, habitat type, species, and data source. For some species collected by the authors, barcoding using COI, 16s, and 12s rRNA genes has been performed. In total, there are at least 62 species of enchytraeids belonging to 12 genera. Seven species (Achaeta macroampullacea, Cognettia sphagnetorum, Enchytraeus dichaetus, Fridericia cusanica, Globulidrilus riparius, Marionina southerni, Mesenchytraeus gigachaetus) are reported in the Russian Far East for the first time. Cognettia sphagnetorum and F. cusanica are most probably introduced. Taxonomic and biogeographical remarks on some of the species found and differences from the original descriptions are provided. Some of the specimens may be undescribed species, but this requires a more in-depth examination. The Russian Far East, especially its southeastern part, is of great interest as a possible location for new species of enchytraeids.

Taxonomic diversity and abundance of enchytraeids (Annelida, Clitellata, Enchytraeida) in the Northern Palaearctic. 1. Asian part

“…At each site, we collected a random selection of 1 to 7 soil monoliths. Detailed information on number of soil monoliths collected from each site can be found in the "samplingEffort" column within the GBIF dataset ( Degtyarev et al 2023 ). These soil monoliths were taken using a 5-cm-diameter steel corer down to a depth of 10 cm.…”

“…We also employed molecular analysis to verify the species Fridericia bulboides and Mesenchytraeus gigachaetus . Detailed information on the methods used for molecular analysis is available in Degtyarev et al (2020) .…”

“…The Sampling Events table consists of 131 events. The Associated Occurrences table consists of 7,074 occurrences ( Degtyarev et al 2023 ).…”

“…This is especially true for the eastern part of the Northern Palearctic, which remains as one of the least studied areas in terms of enchytraeids ( Nurminen 1982 , Rota and de Jong 2015 ). Nevertheless, the situation is changing and there is a growing interest in the ecology and taxonomy of Enchytraeidae in this part of the world ( Rota et al 2018 , John et al 2019 , Degtyarev et al 2020 ). The objective of this data paper is to address this knowledge gap.…”

Long-term dynamics of the abundance of earthworms and enchytraeids (Annelida, Clitellata: Lumbricidae, Enchytraeidae) in forests of the Central Urals, Russia

“…There were no specialists in this taxon for a long time in Russia and the country’s territory was almost a blank spot ( Nurminen 1980 ). The situation began to improve only recently ( Degtyarev et al 2020 ), but so far, the fauna of the Urals has not been studied at all.…”