Biodiversity Data Journal 7: e46327 CO)
doi: 10.3897/BDJ.7.e46327 open access
Single Taxon Treatment

Description of a new Pselaphodes Westwood
(Coleoptera: Staphylinidae: Pselaphinae) from
Vietnam

Rostislav Bekchievt, Zi-Wei Yin’, Manh Quang Vul'1, My Ha Trall, Hanh Hoang Nguyen*

+ National Museum of Natural History, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd., 1000, Sofia, Bulgaria

§ Lab of Environmental Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai 200234,
Shanghai, China

| Hanoi National University of Education (HNUE), 136 Xuan Thuy Rd., DHSP Cau Giay, Hanoi, Vietnam

4] Ho Chi Minh City University of Food Industry, 140 Le Trong Tan St., Tan Phu, Ho Chi Minh, Vietnam

# Institute of Ecology and Works protection, Hanoi, Vietnam

Corresponding author: Rostislav Bekchiev (bekchiev@nmnhs.com)
Academic editor: Stylianos Chatzimanolis
Received: 05 Sep 2019 | Accepted: 27 Sep 2019 | Published: 03 Oct 2019

Citation: Bekchiev R, Yin Z-W, Quang Vu M, Tra MH, Nguyen HH (2019) Description of a new Pselaphodes
Westwood (Coleoptera: Staphylinidae: Pselaphinae) from Vietnam. Biodiversity Data Journal 7: e€46327.
https://doi.org/10.3897/BDJ.7.e€46327

ZooBank: urn:lsid:zoobank.org:pub:7C0134C1-47E0-419A-837E-A3BE1BE2B233

Abstract
Background
A new species of the genus Pselaphodes Westwood, P. fansipanensis Bekchiev & Yin sp.

n., is described from northern Vietnam. The unique modification of the antennomeres 9-10
of the male readily separates the new species from all known congeners.

New information

New Pselaphodes species from Vietnam

© Bekchiev R et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC
BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are
credited.

2 Bekchiev R et al

Keywords

Asia, Indochina, Tyrini, taxonomy, new species

Introduction

The Pselaphinae (Coleoptera: Staphylinidae) fauna of Vietnam is poorly studied. Until now,
112 species (Bekchiev 2010, Nomura 2013, Nomura and Pham 2019) have been known
from the country. The diversity of habitats and environmental conditions in Vietnam implies
that the diversity of pselaphine fauna may be much greater. A total of 65 species of
Pselaphodes (Tyrini) have been described, all from the Oriental region - China, Nepal,
India, Sri Lanka, Thailand, the Philippines and East Malaysia (see Huang et al. 2018 for
checklist and distributional map) and two additional unnamed species were recently
reported from Vietnam (Nomura and Pham 2019).

In September 2018, a short expedition to southern and northern Vietnam was organised by
the Institute of Ecology and Works Protection (Hanoi) and the National Museum of Natural
History (Sofia), giving the opportunity to collect rich zoological material. One of the visited
localities was Fansipan Mountain and, especially, the Fansipan Summit. It is the highest
(3,143 metres a.s.l.) mountain in the Indochinese Peninsula (including Vietnam, Laos and
Cambodia), hence its nickname "the Roof of Indochina’.

Included in the material was a new Pselaphodes species, which is described below.

Materials and methods

The material was collected in an open habitat with shrubs and grasses (Fig. 1) by soil and
litter sifting.

Specimens were examined by Zeiss Stemi 2000C stereo-microscopes. Male genitalia and
other dissected parts were studied using a Zeiss transmitted-light microscope at
magnifications up to 500x. Genital segments were dissected and treated with potassium
hydroxide (KOH). The dissected parts were mounted in Euparal and pinned with the
relevant specimen.

The following acronyms are used in the text: BL—length of the body (= HL + PL + EL +
AL); HL—length of the head from the anterior clypeal margin to the occipital constriction;
HVV—width of the head across eyes; PL— length of the pronotum along the midline; PW—
maximum width of the pronotum; EL—length of the elytra along the suture; EW/—maximum
width of the elytra; AL—length of dorsally visible part of the abdomen along the midline;
AVW—maximum width of the abdomen; NMNHS — National Museum of Natural History,
Sofia, Bulgaria