Two species of Mylonchulus, M. kermaniensis and M. oceanicus, were recorded, described and illustrated for the first time from Vietnam. Mylonchulus kermaniensis was collected from Nghe An province, their measurements and description correspond well with the type population from Kerma, Iran except for the absence of vulval papilla(e). Mylonchulus oceanicus was found in Cao Loc, Lang Son province. | TAP CHI HOC 2016, 38(3): 287-292 NewSINH data of two Mylonchulus species DOI: NEW DATA OF TWO Mylonchulus SPECIES (Mononchida: Mylonchulidae) AND AN UPDATED KEY TO SPECIES FROM VIETNAM Vu Thi Thanh Tam Institute of Ecology and Biological Resources, VAST ABSTRACT: Two species of Mylonchulus, M. kermaniensis and M. oceanicus, were recorded, described and illustrated for the first time from Vietnam. Mylonchulus kermaniensis was collected from Nghe An province, their measurements and description correspond well with the type population from Kerma, Iran except for the absence of vulval papilla(e). Mylonchulus oceanicus was found in Cao Loc, Lang Son province. Measurements and description of the Vietnamese specimens fit well the type population from Hawaii, USA as well as another population from Japan except for a slightly shorter tail (c = 47-56 vs 39-49 in type and other population). In addition, an updated key to twenty already known species in Vietnam is also given in this paper. Keywords: Mylonchulidae, Mylonchulus, new records, nematode, Vietnam. Citation: Vu Thi Thanh Tam, 2016. New data of two Mylonchulus species (Mononchida: Mylonchulidae) and an updated key to species from Vietnam. Tap chi Sinh hoc, 38(3): 287-292. DOI: . *Corresponding author: vtam7572@ INTRODUCTION In Vietnam, up to now, the studies on predaceous nematodes of the order Mononchida have revealed 18 species on a total of 77 species of the genus Mylonchulus (Mylonchulidae) [4]. In the present paper, two additional Mylonchulus species were identified from Nghe An and Cao Bang provinces; they represent new records for the nematode fauna in Vietnam. M. kermaniensis was collected from soil around the base of banana at Nghe An province. This species was originally described from Kerman and Iran [6]. Andrassy (1986) [3] first reported M. oceanicus from Hawaii, USA and Ahmad et al. (2010) [2] recorded this species from Okinawa, Japan
