Platyintybia sarawakensis ( Champion, 1921 ) Liu & Wang & Song & Ding & Li, 2024

Liu, Zhenhua, Wang, Yuqi, Song, Haitian, Ding, Bi & Li, Zhiqiang, 2024, Platyintybia, a new genus of Apalochrini (Coleoptera, Melyridae, Malachiinae) from China, ZooKeys 1201, pp. 345-356 : 345-356

Platyintybia sarawakensis ( Champion, 1921) comb. nov.

Figs 2 , 3 , 4

Laius sarawakensis Champion, 1921 .

Intybia sarawakensis : Plonski 2016: 27.

Diagnosis.

As for Platyintybia zhongshanensis (Fig. 3 F – I ).

Materials examined.

Holotype: Malaysia • ♂: Borneo , Mount Mattang, W. Sarawak, 1000 m elev.; 17 Jan. 1914; G. E. Bryant leg.; BMNH.

Other materials examined.

China – Fujian Province • ♂: Zhangzhou, Zhangjiangkou mangrove forest; 23 ° 55 ′ 21.75 ″ N, 117 ° 24 ′ 54.96 ″ E; 17 Oct. 2022; Malaise trap; Rongxiang Su leg.; IZGAS COL 0002 . • ♀: Zhangzhou, Zhangjiangkou mangrove forest; 23 ° 55 ′ 21.75 ″ N, 117 ° 24 ′ 54.96 ″ E; 17 Oct. 2022; beating on Avicennia marina (Forsk.) Vierh. ; IZGAS COL 0003 . • 1 ♂, 1 ♀: Zhangzhou, Zhangjiangkou mangrove forest; 23 ° 55 ′ 21.75 ″ N, 117 ° 24 ′ 54.96 ″ E; 5 m a. s. l.; 29 Aug. 2023; YF Zhang leg.; FAF COL 0001 to 0002 . • 2 ♀: Zhangzhou, Zhangjiangkou mangrove forest; 23 ° 55 ′ 21.75 ″ N, 117 ° 24 ′ 54.96 ″ E; 5 m a. s. l.; 16 Sep. 2023; YF Zhang leg.; FAF COL 0003 to 0004 . • 2 ♂, 5 ♀: Zhangzhou, Zhangjiangkou mangrove forest; 23 ° 55 ′ 21.75 ″ N, 117 ° 24 ′ 54.96 ″ E; 5 m a. s. l.; 16 Sep. 2023; YF Zhang leg.; FAF COL 0005 to 0011 .

Description.

Length about 2.7 mm.

Male. Antenna mostly yellow with base of scape and apical antennomere black. Legs with femora mostly black, apex of front and middle tibiae rufous; front tibiae and tarsi rufous, middle tibiae brownish to black, hind tibiae black with basal part rufous, middle and hind tibiae brownish. Elytra with basal spots large and suboval, not extending to lateral or inner suture; subapical spots rounded, a little smaller. Abdominal ventrites mostly orange-red, with lateral areas black.

Head about 1.1 times as wide as pronotum; concavities on head not extending to anterior margin of eyes; width of vertex between concavities about 1.5 times as wide as concavity across middle of eyes. Dorsal surface of head with pair of circinately arranged setae behind antennal insertions. Antenna with scape elongate, subtriangular, and constricted at base; antennomere 3 elongate, with large lamellate process at base, dorsal surface with 1 large, transversely elliptical anterior concavity and 2 indistinct basal concavities.

Pronotum about as long as wide. Elytra about 1.5 times as long as wide; epipleura not extending to apical margin of elytra. Front tibiae about 6.4 times as long as wide, front tarsi 4 - segmented.

Abdomen with tergite VIII subtrapezoidal, posterior margin with shallow emargination (Fig. 4 E ); sternite VIII divided. Male genitalia with penis slender, dorsoventrally curved, apex constricted and upwardly curved; inner sac with a slender, curved sclerite and a few small sclerites around it, apex with dense, small denticles (Figs 4 F , 4 G ).

Female. Resembling male in colour and body shape, but with antennae more brownish, scape and antennomere 3 only slightly dilated, terminal antennomere simple; head without concavity on vertex; front tarsi 5 - segmented.

Distribution.

China (Fujian), Malaysia (Borneo).

Biology.

Information on feeding habits and behaviour is scarcely known. The Chinese specimens were found on the leaves of plants in a mangrove forest, and the holotype was collected on Mount Matang without details of the habitat noted.

Figures

Figure 2. Platyintybia sarawakensis (Champion, 1921) A dorsal view, male B ventral view, male C dorsal view, female D holotype, male E label information. Scale bars: 1 mm (A – C).

Figure 3. A – E Platyintybia zhongshanensis Liu et Wang, sp. nov. F – J Platyintybia sarawakensis (Champion, 1921) A, G antenna, male B, H lateral view of basal antennomeres, male C, I dorsal view of antennomere 11, male D, F fore tibia, male E, J dorsal view of head, male.

Figure 4. A – C Platyintybia zhongshanensis Liu & Wang, sp. nov. E – G Platyintybia sarawakensis (Champion, 1921) A, F male genitalia, dorsal view B, G male genitalia, lateral view C, E tergite VIII, dorsal view D sternite VIII, ventral view.