A review of the powderpost beetle genera Xylothrips Lesne, 1901 and Calophagus Lesne, 1902 (Coleoptera: Bostrichidae: Bostrichinae: Xyloperthini)
Author
Liu, Lan-Yu
2A7CCDB9-5AA5-4C96-821F-64867C4E29C0
Department of Science Communication, National Pingtung University, No. 1, Linsen Rd, Pingtung City, Pingtung County 90049, Taiwan.
liulysky@gmail.com
text
European Journal of Taxonomy
2021
2021-04-23
746
1
130
147
http://zoobank.org/d6aaf507-ac02-47e8-95db-47b936e625bc
journal article
7203
10.5852/ejt.2021.746.1325
35f02296-6df2-4250-b16a-a9117c162d85
2118-9773
4714316
D6AAF507-AC02-47E8-95DB-47B936E625BC
Genus
Calophagus
Lesne, 1902
stat. res.
Figs 1A–B
,
4
Calophagus
Lesne, 1902: 108
(
type
species:
Calophagus pekinensis
Lesne, 1902: 109
).
This genus was erected by
Lesne (1902)
for the single Chinese species,
Calophagus pekinensis
.
Reichardt (1966)
described a new Chinese species,
Xylothrips cathaicus
, from the same area as
C. pekinensis
.
Park
et al.
(2015)
synonymised
X. cathaicus
with
C. pekinensis
as
Xylothrips pekinensis
based on the black and white figures of a new record of
X. cathaicus
from Tsushima Island,
Japan
(
Iwata & Kusakabe 2002
) and a new record of
C. pekinensis
from the same location (
Borowski & Węgrzynowicz 2008
), but without examining the
type
material of either species (S. Park, pers. comm.).
Borowski & Węgrzynowicz (2019)
accepted the synonymy given by
Park
et al.
(2015)
and downgraded
Calophagus
to a subgenus of
Xylothrips
. They treated
Xylothrips
(
Calophagus
)
pekinensis
as a new combination.
Lesne (1902)
deposited
5 syntypes
of
Calophagus pekinensis
in MNHN, and
Reichardt (1966)
deposited the
holotype
and
3 paratypes
of
Xylothrips cathaicus
in MCZ, and
one paratype
in the Department of Zoology,
Saõ Paulo
,
Brazil
. The author has examined the
5 syntypes
of
C. pekinensis
in the R. Oberthür collection (MNHN), and the photos of the
holotype
of
X. cathaicus
from the Insect Type Database website of MCZ. Both agree with Lesne’s description of
C. pekinensis
.
The synonymy of
X. cathaicus
with
C. pekinensis
is confirmed. The reasons for the retention of
Calophagus
as a distinct genus are discussed below.
The distribution of the genus is confined to North
China
,
South Korea
and Tsushima Island in
Japan
.
Type
species
Calophagus pekinensis
Lesne, 1902
, by monotypy.
Diagnosis
As a member of
Xyloperthini
Lesne, 1921
, the genus closely resembles the preceding genus. It differs from
Xylothrips
in the following characters: rather dull, not as shining as the preceding genus; antennal club without clearly impressed sensory areas, but each of its three antennomeres with two longitudinal bands of golden hairs on each side of each face; pronotum without lateral carina, a few granules on the posterolateral angles
form the
tip of the angles; very fine punctures all over the elytra, the declivity abruptly declivous with three pairs of small tubercles on the upper margin, the middle one slightly larger, lateral callus small and close to lateral margin of the declivity.