Calophagus Lesne, 1902

Liu, Lan-Yu, 2021, A review of the powderpost beetle genera Xylothrips Lesne, 1901 and Calophagus Lesne, 1902 (Coleoptera: Bostrichidae: Bostrichinae: Xyloperthini), European Journal of Taxonomy 746 (1), pp. 130-147 : 140-141

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.

Figures

Fig. 1. A–B. Calophagus pekinensis Lesne, 1902, ♀ (SNSD). A. Anterolateral view showing the antennae, with two strips of golden hairs on sides. B. Lateral view of head and pronotum showing absence of lateral carina on pronotum. C–D. Xylothrips flavipes (Illiger, 1801), ♂ (LYL). C. Frontal view showing the antennae, matt without sensory areas. D. Lateral view of head and pronotum showing clear lateral carina on pronotum. E–F. Xylothrips religiosus (Boisduval, 1835), ♂ (LYL). E. Frontal view showing the antennae, matt without sensory areas. F. Lateral view of head and pronotum showing clear lateral carina on pronotum. Scale bar = 1 mm.

Fig. 4. Calophagus pekinensis Lesne, 1902, ♀ (SNSD). A. Frontal view. B. Dorsal view. C. Declivity. D. Lateral view of declivity. E. Ventral view. Scale bars = 1 mm (upper scale for B, E; lower scale for A, C–D).