Kolevatov V.A.1,2*, Nguyễn T.V.2, Marin I.N.1,2 2026. Two species of the genus Bathynomus A. Milne-Edwards, 1879 (Isopoda: Cirolanidae) used commercially in South Vietnam // Arthropoda Selecta. Vol.35. No.3: 318–329 [in English].
1 A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Leninsky Prosp. 33, Moscow 119071 Russia.
2 Southern Branch of Joint Vietnam–Russia Tropical Science and Technology Research Center, Ho Chi Minh, Vietnam.
* Corresponding author
Vasily Kolevatov: catpingus@mail.ru https://orcid.org/0000-0003-4087-9809
Thịnh Văn Nguyễn: thinh39b@gmail.com https://orcid.org/0000-0002-5376-830X
Ivan Marin: coralliodecapoda@mail.ru https://orcid.org/0000-0003-0552-8456
doi: 10.15298/arthsel.35.3.05
ABSTRACT. Representatives of Bathynomus vaderi Ng, Sidabalok et Nguyen, 2025 and B. jamesi Kou, Chen et Li, 2017 (Crustacea: Isopoda: Cirolanidae) are herein reported for the first time from a fish market in Long Hòa, Cần Giờ District (Hồ Chí Minh City), as well as from several markets in Hồ Chí Minh City, southern Vietnam. The examined specimens of both species were analyzed using an integrative approach combining morphological examination and molecular analysis based on two genetic markers (mitochondrial COI mtDNA and 16S rRNA genes). According to information provided by the vendor, specimens of the recently described B. vaderi were collected from the southern continental shelf of the East Sea, as well as from areas surrounding the Trường Sa Archipelago (= Spratly), at depths of approximately 500–700 m. This record significantly extends the known distribution of the species to the southern part of the East Sea. The male of B. vaderi is described in detail based on specimens collected from southern Vietnam.
KEY WORDS: fisheries, Isopoda, Bathynomus, morphology, taxonomy, seafood.