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Details of the morphology of Aeolosoma vietnamicum sp. n. A. Entire body of holotype, lateral view; head to the left. B. Bundle of ventral sigmoid chaetae. C. Serrated hair chaeta, detail. D. A dorsal bundle with two hair chaetae and two sigmoid chaetae. E. Drawing of ventral sigmoid chaeta, lateral view. F, G. Tips of the ventral sigmoid chaetae, lateral view. H. Tip of the ventral sigmoid chaeta, frontal view from the concave side. I, J. Tips of dorsal sigmoid chaetae, lateral view.
Source publication
A new species of the Aeolosomatidae, Aeolosoma vietnamicum sp. n., found in freshwater bodies of Vietnam, is illustrated and described. The new species differs from its congeners in the presence of specific sigmoid chaetae in the dorsal and ventral bundles of all segments, beginning from II. These chaetae are characterized by tips with two apical t...
Citations
... Remarks: This is a recently discovered species and described in Vietnam [113]. Due to the presence of unique sigmoid chaetae in the dorsal and ventral body bundles, it can be easily distinguished from other members of the genus even in a fixed state. ...
... In addition, 2 new annelid species, discovered for the first time during the study of the Vietnamese meiobenthos, were already described not long ago. These are the naidid Bratislavia gusevi and the aeolosomatid Aeolosoma vietnamicum [48,113]. ...
... Thus, the total diversity of the genus in the studied material is a minimum of 8 species, which approximately corresponds to the total number of the aeolosomatid members currently known in the Oriental area [5,9,13]. At the same time, the recently described A. vietnamicum [113], as well as, apparently, another representative of the genus found by us in Vietnam, Aeolosoma sp. No. 3, are species previously unrecorded in the country. ...
This work continues a series of publications on the diversity of the main groups of invertebrates found through the investigation of meiobenthic communities in various inland waterbodies in central and southern Vietnam. Here, a checklist of oligochaetes and aeolosomatids (the annelid worms) discovered for the period 2010–2021 is presented, as well as data on the structure and abundance of their populations found in the country, ecology, local and global distribution, and, where necessary, taxonomic, morphological and other comments. In total, 71 representatives of the species and supra–species ranks from 3 families and 17 genera are listed. In total, 39 representatives were identified to the species level. During the present research, 2 species new to science were discovered and described in previously published works. This paper reports 9 more forms that need further study and may belong to still undescribed species. In addition to the new and still-unidentified species, the checklist reports about 30 more members of species and supra–species ranks that were recorded in Vietnam for the first time. Based on new and previously published data, the currently known diversity of aquatic oligochaetes and aeolosomatids in Vietnam is estimated at approximately 100–113 and 8–9 representatives, respectively. It is shown that members of the family Enchytraeidae remain practically unexplored in the waterbodies of the region. The subfamily Tubificinae and the family Aeolosomatidae also continue to be relatively poorly studied here at the species level.
