Liroetis baolocanus, Bezděk, 2021

Bezděk, Jan, 2021, Redefinition of Liroetis, with descriptions of two new species and an annotated list of species (Coleoptera: Chrysomelidae: Galerucinae), Acta Entomologica Musei Nationalis Pragae 61 (2), pp. 529-614 : 547

Liroetis baolocanus sp. nov.

( Figs 61–64 , 70–71 )

Type locality. Vietnam, Lam Dong Province, 14 km SW of Bao Loc.

Type material examined. Hඈඅඈඍඒඉൾ: J, ‘S VIETNAM / 14 km SW Bao Loc / 16.– 29.5.1994 / Pacholatko & Dembicky [w, p]’ ( NHMW). The holotype is provided with one printed red label ‘ HOLOTYPUS, / Liroetis / baolocanus sp. n. / J. Bezděk det., 2020’.

Description. Body length. J: 7.8 mm (holotype).

Male (holotype, Figs 61–64 ). Body completely yellowish brown, apices of mandibles black, antennomere XI with black sensilla patch.

Head ( Fig. 63 ). Labrum transverse with widely rounded anterior angles, surface with six setigerous pores in transverse row bearing pale seta. Anterior part of head convex, covered with sparse large punctures, setae visible only at anterolateral angles. Space below eyes with deep oblique grooves for insertion of antennomere I. Nasal keel sharp, flat. Interantennal space 0.8 time as wide as antennal insertion. Interocular space twice as wide as transverse diameter of eye. Frontal tubercles distinctly elevated, microsculptured, subpentagonal, with anterior apices divergent, separated by apex of nasal keel. Vertex impressed behind frontal tubercles, surface covered with fine punctures. Antennae short, 0.57 times as long as body, length ratio of antennomeres I to XI equals 100: 20: 60: 60: 53: 53: 53: 46: 46: 53: 66. Antennomere I bent, IX–XI distinctly flattened, XI with black sensilla patch on inner side.

Pronotum ( Fig. 63 ) transverse, twice as wide as long, lustrous, covered with fine punctures. Anterior margin moderately concave, thinly bordered, posterior margin rounded, thinly bordered, lateral margins rounded, with wider border. Anterior angles triangularly projected, posterior angles obtusangulate, all angles with setigerous pore bearing pale seta. Several small pores with short setae also on lateral margins.

Scutellum triangular with rounded tip, surface slightly convex covered with fine punctures, glabrous.

Elytra convex, glabrous, 1.83 times as long as wide (measured at humeral calli), 0.73 times as long as body, divergent posteriorly, widest in posterior third, covered with very fine confused punctures. Humeral calli well developed. Epipleura wide in anterior half, narrowed in middle and disappeared in posterior third.

Underside. Anterior coxal cavities semiopen posteriorly. Abdominal ventrite IV with semicircular oblique impression and with hook-like lamela directed posteriorly in middle of posterior margin ( Fig. 71 ), ventrite V with large channel-like groove, wider basally, narrower apically, middle part constricted.

Legs. Protarsomere I narrow, almost parallel, length ratio of protarsomeres I–IV equals 100: 60: 60: 86. Mesotarsomere I wider, elongate subtriangular, length ratio of mesotarsomeres I–IV equals 100: 66: 73: 113. Metatarsomere I narrow, elongate subtriangular, length ratio of mesotarsomeres I–IV equals 100: 60: 55: 90. Metatibial spur present, thin and sharp. Claws with large appendices.

Aedeagus ( Fig. 70 ). Median lobe of aedeagus 4.11 times as long as wide; apical third oval, apex incised, basal two thirds wide, subparallel. Lateral view: apical part folded; lateral elevation placed in middle, cavitous. Dorsal process 3.69 times as long as wide, 0.65 times as long as median lobe of aedeagus; subparallel, wider at base and in apical third, apex collar-like. Lateral view: dorsal process with basal 2/3 straight, apical part sinuate.

Female. Unknown.

Differential diagnosis. Liroetis baolocanus sp. nov. is very similar to L. aurantiacus sp. nov. They differ in body colouration (orange brown in L. aurantiacus sp. nov., yellowish brown in L. baolocanus sp. nov.) and structure of aedeagus (apical third of median lobe of aedeagus wide and oval in L. baolocanus sp. nov. while apical 2/5 narrow and subparallel in L. aurantiacus sp. nov., compare Figs 65 and 70 ).

Etymology. The species name baolocanus refers to the type locality Bao Loc in Vietnam; adjective.

Distribution. Southern Vietnam.

Figures

Figs 57–64. New species of Liroetis. 57–60 – L. aurantiacus sp. nov., male, holotype (7.8 mm). 57 – Dorsal view; 58 – lateral view; 59 – head and pronotum; 60 – labels. 61–64 – L. baolocanus sp. nov., male, holotype (7.8 mm). 61 – Dorsal view; 62 – lateral view; 63 – head and pronotum; 64 – labels.

Figs 65–71. Details of new species of Liroetis. 65–70 – L. aurantiacus sp. nov. 65 – Aedegus in dorsal, lateral and ventral views; 66 – female pygidium; 67 – spermatheca; 68 – sternite VIII; 69 – male abdomen in ventral and lateral views. 70–71 – L. baolocanus sp. nov. 70 – Aedegus in dorsal, lateral and ventral views; 71 – male abdomen in ventral and lateral views. Scales: 0.5 mm for Figs 65–66, 68 and 70, 0.25 mm for Fig. 67; 1 mm for Figs 69, 71.