Biodiversity Data Journal :
Taxonomy & Inventories
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Corresponding author: Haoyu Liu (liuhy@hbu.edu.cn), Yuxia Yang (yxyang@hbu.edu.cn)
Academic editor: Enrico Ruzzier
Received: 12 Apr 2023 | Accepted: 25 Apr 2023 | Published: 10 May 2023
© 2023 Junbo Tong, Sergei Tshernyshev, Haoyu Liu, Yuxia Yang
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.
Citation:
Tong J, Tshernyshev SE, Liu H, Yang Y (2023) First record of the genus Pectapalochrus Tshernyshev, 2016 (Coleoptera, Malachiidae) from China. Biodiversity Data Journal 11: e104877. https://doi.org/10.3897/BDJ.11.e104877
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Pectapalochrus Tshernyshev, 2016 is a small genus belonging to the tribe Apalochrini in the family Malachiidae (Coleoptera, Cleroidea), with four currently known species: P. omega (Evers, 1965) from Mongolia, P. armenus (Iablokoff-Khnzorian, 1978) from Armenia, P. pictus (Motschulsky, 1860) from Russia and P. pectinicornis (Erichson, 1840) from Russia and Mongolia.
Pectapalochrus Tshernyshev, 2016 is newly recorded from China upon the discovery of P. omega (Evers, 1965) from Ningxia Autonomous Region. The morphological characters of the adult are re-described in detail with illustrations of external appearance and relevant characters.
new record, Apalochrini, taxonomy, China, Cleroidea
The genus Pectapalochrus was proposed by
To date, the genus Pectapalochrus is comprised of four species distributed in Armenia, Mongolia and Russia (
In this study, Malachiidae beetles are considered as a family (
For descriptions, special male structures and genitalia were studied. The term “special male structures” is not analogous to the term “Excitatoren”, that means different kinds of structures located in different parts of the male body of soft-winged flower beetles and bearing ducts of pheromone glands necessary for female attraction and successful copulation (
Terminology of terminalia morphology is according to
The specimens examined in this study are deposited in Museum of Hebei University, Baoding, China (MHBU). The specimen had its abdomen detached and soaked in 10% solution of sodium hydroxide (NaOH) by boiling for several minutes. Ovipositor was dyed with haematoxylin. Genitalia were dissected, cleaned and transferred to glycerol on slides and photographed with a LEICA DFC450 colour digital camera attached to the LEICA M205 A microscope. LAS V.4.7 software was used to capture genitalia images. External morphology was observed with the Nikon SMZ1500 stereomicroscope. Images of adults were taken with a Canon EOS 80D digital camera and stacked in Helicon Focus 7. The final plates were prepared in Adobe Photoshop CS 6.0.
Pectapalochrus Tshernyshev, 2016 -
Body medium-sized, ranging from 2.8 to 4.7 mm in length. Antennae flabellate or strongly serrate, antennomere 2 very small and not conspicuous, antennomere 3 triangular (Fig.
Main characters of Pectapalochrus omega (Evers, 1965), male. a head; b antenna; c labium; d maxilla; e labrum; f mandible; g fore tarsi; h ultimate abdominal ventrite (apical sternite); i pygidium (apical tergite); j male genitalia, lateral view, k male genitalia, ventral view. Scale bars: 0.2 mm.
China (new faunistic record: Ningxia), Russia, Mongolia, Armenia.
Apalochrus omega Evers, 1965 -
Flabellapalochrus omega (Evers, 1965): Evers, 1987 -
Dromanthomorphus omega (Evers, 1965): Wittmer, 1990 -
Pectapalochrus omega (Evers, 1965): Tshernyshev, 2016 -
Apalochrus boops Evers, 1968 -
Male. Length of body 3.5–4.7 mm, width at widest part of elytra 1.5–2.3 mm and at the base of elytra 1.2–1.6 mm.
Head capsule black. Antennae yellow to black: antennomere 1 yellow with a dark spot on inner side; 2 entirely yellow; 3–8 yellow to black; 9–11 entirely black. Mouthparts black. Pronotum black. Elytron with variable black and yellow markings, from black with a small yellow spot near apex to yellow with two black stripes at humerus and apical third. Scutellar shield black. Legs yellow to black (Fig.
Head almost as wide as pronotum (Fig.
Pronotum subrounded, lateral sides evenly rounded, anterior margin slightly convex, posterior margin straight, with a distinct transverse depression at base (Fig.
Scutellar shield small and transverse, with smoothed edges (Fig.
Elytra subparallel, widened behind the base and evenly rounded at apices, base of elytra distinctly wider than pronotum. Humeri distinct, slightly protruding. Elytral apices evenly rounded (Fig.
Hind wings normally developed.
Legs slender. Hind femora not reaching elytral apices. All tibiae thin and straight (Fig.
Metathorax simple, lacking appendages. Pygidium transverse, with almost straight distal side (Fig.
Female. Length of body 3.5–4.6 mm, width at widest part of elytra 1.6–2.2 mm and at the base of elytra 1.1–1.6 mm.
Similar to male species, except for antennae short and serrate, fore-tarsi lacking comb, pronotum with an inconspicuous transverse depression at base (Fig.
Pygidium sub-trapezoid with apical margin almost straight (Fig.
This species is similar to P. pectinicornis (Erichson, 1840) in entirely black pronotum and yellow to black antennae and legs, but can be distinguished from the latter by the elytra with variable black and yellow markings, antennomere 3 scalene triangular in male and subcylindrical in female (Fig.
The present study was financially supported by the National Natural Science Foundation of China (No. 32270491), the Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment, China (2019HJ2096001006) and the Youth Scientific Research and Innovation Team of Hebei University (605020521005). Additionally, this study was supported in part by the Program of Basic Scientific Research (FNI) of the State Academies of Sciences (No. 0247-2021-0004).