Plesiocoelus van Achterberg is a rare genus of the subfamily Agathidinae. The genus was established by van Achterberg in 1990 with one Neotropical species included, Plesiocoelus bassiformis van Achterberg, 1990. Based on specimens deposited at the Institute of Ecology & Biological Resources and Vietnam National Museum of Nature, the genus Plesiocoelus van Achterberg is newly recorded from Vietnam with a new species, Plesiocoelus vietnamicus Long & van Achterberg, sp. n. described and illustrated in this paper. Differences between the new species and P. bassiformis van Achterberg, are given. | TAPACHI 304-309 newSINH speciesHOC of the2016, genus38(3): Plesiocoelus DOI: A NEW SPECIES OF THE GENUS Plesiocoelus van Achterberg (Hymenoptera: Braconidae: Agathidinae) FROM VIETNAM Khuat Dang Long1*, Cornelis van Achterberg2 1 Institute of Ecology & Biological Resources, VAST, Vietnam Department of Terrestrial Zoology, NCB Naturalis, Postbus 9517, 2300 RA Leiden, The Netherlands 2 ABSTRACT: Plesiocoelus van Achterberg is a rare genus of the subfamily Agathidinae (Braconidae). The genus was established by van Achterberg in 1990 with one Neotropical species included, Plesiocoelus bassiformis van Achterberg, 1990. Based on specimens deposited at the Institute of Ecology & Biological Resources (IEBR) and Vietnam National Museum of Nature (VNMN), the genus Plesiocoelus van Achterberg is newly recorded from Vietnam with a new species, Plesiocoelus vietnamicus Long & van Achterberg, sp. n. described and illustrated in this paper. Differences between the new species and P. bassiformis van Achterberg, are given. Keywords: Braconidae, Agathidinae, Plesiocoelus, new record, new species, Neotropical, Oriental, Vietnam. Citation: Khuat Dang Long, Achterberg C. van, 2016. A new species the genus Plesiocoelus van Achterberg (Hymenoptera: Braconidae: Agathidinae) from Vietnam. Tap chi Sinh hoc, 38(3): 304-309. DOI: . *Corresponding author: khuatdanglong@. INTRODUCTION MATERIALS AND METHODS Agathidinae is a moderately large subfamily of Braconidae and has a worldwide distribution; members of this subfamily are found in most terrestrial habitats. In the recent revision of the Agathidinae from Vietnam by van Achterberg & Long (2010) [5], seventeen genera of Agathidinae from Vietnam were revised. This work gave an overview of the diversity of Agathidinae of Vietnam and provided keys to genera and all known agathidine species from Vietnam. In this work, five genera, viz. Hypsostypos Baltazar, 1963; .
