Sulcolotis Miyatake, 1994

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 : 76-77

Genus Sulcolotis Miyatake, 1994

( Figs 1a–l )

Sulcolotis Miyatake, 1994: 251 .

Type species: Sulcolotis seminigra Miyatake, 1994 , by monotypy.

Diagnosis. This genus can be easily distinguished from all other genera of the tribe Sticholotidini by its sulcate genae, narrow intercoxal process of prosternum and short maxillary palpi.

Description. Body broadly oval, moderately to strongly convex; dorsal surface apparently glabrous, head, lateral margins of pronotum and elytra and basal areas of elytra indistinctly pubescent ( Figs 2a–c ).

Head relatively broad and large ( Fig. 2c ) with frons flat and punctate ( Fig. 1a ). Clypeus short and transverse with anterior margin emarginate medially ( Fig. 1b ). Eyes relatively large, finely faceted, slightly emarginate in front of antennal socket, inner orbital striae fine and inconspicuous ( Fig. 2c ). Antennae moderately long, composed of 11 antennomeres, with a narrowly dilated 3 antennomere club ( Figs 1a, c ). Labrum transverse, rounded anteriorly and covered with long dense setae ( Fig. 1d ). Mandible subtriangular with two apical teeth, sharp and smooth; mola well developed without distinct molar teeth ( Figs 1e, f ). Maxillary palp with four palpomeres, palpomere 1 small, palpomere 2 geniculate and at least two times as long as wide, palpomere 3 obviously short, terminal one slender, sub parallel sided, with obliquely truncate apex ( Fig. 1g ). Labial palp with three palpomeres, palpomere 1 tiny, palpomere 2 swollen, terminal palpomere slender, strongly conical, pointed apically; ligula membranous; insertion of labial palps visible ventrally on prementum; mentum trapezoidal, distinctly narrowed basally ( Fig. 1h ). Pronotum moderately convex, broadly and gently emarginate anteriorly; anterior portion laminate and transparent; lateral margin narrowly reflexed; posterior corners subrectangular; base somewhat sinuously produced posteriorly, basal margin with distinct and complete carina ( Figs 2a–c ). Scutellar shield triangular ( Figs 2a, c ). Elytra with prominent humeral angles, convex, anterior margin almost equal in width to hind margin of pronotum, lateral margins rounded, broadly explanate ( Figs 2a–c ). Elytral epipleurae moderately wide at basal half, slightly inclined and gradually narrowing to apex.

Prosternum T–shaped, with inconspicuous punctures; prosternal process with carinae, narrow, less than half width of procoxal cavity diameter; hypomeron broad without foveae ( Fig. 1i ).

Mesoventral process broad, as wide as mesocoxal diameter, with golden pubescence and inconspicuous punctures; metaventral postcoxal lines recurved, complete laterally, joined on metaventral process and forming a straight line ( Fig. 1j ).

Abdomen with six ventrites, ventrite 1 moderately long, around 3x as long as ventrite 2, with postcoxal lines incomplete laterally, not reaching posterior margin of ventrite 1 but running parallel in short distance to it; ventrites 2–4 successively shorter, ventrite 5 as long as the preceding two combined, its posterior margin broadly rounded in female ( Fig. 2g ).

Female genitalia: coxites elongate ( Fig. 1l ), subtriangular, without stylus. Spermatheca C-shape, sclerotised ( Fig. 1k ).

Distribution. Philippines (Mindanao, Luzon).

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.