Sulcolotis threadis Liu & Wang, 2022

Liu, Liyuan, Wang, Yan, Guo, Qiuhong, Chen, Xiaosheng & Wang, Xingmin, 2022, Three new species of the genus Sulcolotis Miyatake (Coleoptera, Coccinellidae Sticholotidini) from the Philippines, Zootaxa 5168 (1), pp. 75-82 : 77-78

Sulcolotis threadis Liu & Wang sp. nov.

( Figs 1a–l )

Diagnosis. This species can be easily separated from S. seminigra by the following characters: elytron yellow, with a large black spot situated at 1/3 elytral length to base. In S. seminigra , elytra are black in basal half and yellow in apical half, without dark spots. It is also similar to S. ovalis but can be separated from the latter by the bright yellow head and penis guide nearly as long as parameres. In S. ovalis , head is reddish brown and penis guide shorter than parameres.

Description. TL: 2.73–3.07mm, TW: 2.30–2.52mm, TH: 1.51–1.56mm, TL/TW: 1.19–1.22, PL/PW: 0.26–0.29, EL/EW: 0.88–0.89, HW/PW: 0.56–0.63, PW/TW: 0.63–0.66, HW/TW: 0.38–0.40, Eye W/HW: 0.54–0.59.

Head yellow. Pronotum, scutellar shield, and elytra bright yellow, with small dense punctures. Underside yellowish brown, except metaventrite and the middle part of the first ventrite blackish brown.

Body rounded, weakly convex, dosally shiny and glabrous ( Figs 2a–c ). Head 0.39 times of elytral width (HW/ TW=1:2.6). Eyes finely faceted interocular distance 0.57 times of head width. Frons broad with punctures uniform and dense ( Fig. 2c ).

Pronotum 0.65 times of elytral width (PW/TW=1:1.5), moderately transverse, punctures uniform ( Figs 2a, c ). Elytra with uniform and dense punctures ( Figs 2a–c ).

Ventrite 6 of posterior margin at middle slightly concave and ventrite 7 subtrianglar ( Fig. 2g ).

Male genitalia ( Figs 2d–f ): penis long and slender, apex pointed, penis capsule with inner arm reduced and outer arm well developed; tegmen with penis guide as long as parameres, in lateral view stout, widest at base, gradually narrowing to a pointed apex.

Type material. Holotype: ♂, Philippines, Baguio, Benguet, Baker ( USNM) . Paratypes: 6♀, same data as holotype ( USNM, ANIC) ; 1♂ 4♀, Philippines, Luzon– Benguet LaTrinidadv. 1914, G.Boellcher 6500’ ( MNHB) ; 1♀, Philippines 1600m, Mindanao, 30 km W of MARAMAG, 28–30. Dec. Bolm 1gt. 1990 ( BNHM) .

Distribution. Philippines (Mindanao, Luzon).

Etymology. The specific name threadis is adopted as meaning thread, referring to its thin and long penis.

Figures

FIGURE 1. Sulcolotis threadis Liu et Wang sp. n.: a) head, ventral; b. head, clypeus; c. antenna; d. labrum; e. left mandible; f. right mandible; g. maxilla; h. labium; i. prothorax, ventral; j. meso- and metaventrite; k. spermatheca; l. female genitalia.

FIGURE 2. Sulcolotis threadis Liu et Wang sp. n.: a) dorsal habitus; b. lateral habitus; c. frontal habitus; d. tegmen, ventral view; e. tegmen, lateral view; f. penis; g. abdomen, male.