Merionoeda (Macromolorchus) curtipennis (Pic, 1922)

Wang, P., Liu, M. - Y., Xie, G. - L. & Wang, W. - K., 2022, Study on the genus Merionoeda Pascoe, 1858 (Coleoptera: Cerambycidae, Cerambycinae) from Hubei, China, Far Eastern Entomologist 455, pp. 7-13 : 8-11

Merionoeda (Macromolorchus) curtipennis (Pic, 1922)

Figs 1, 2 , 5–11 , 13–16

Macromolorchus curtipennis Pic, 1922: 28 ; Hayashi, 1979: 71.

Merionoeda (Macromolorchus) curtipennis: Gressitt & Rondon, 1970: 116 .

MATERIAL EXAMINED. China: Hubei, Shennongjia Forestry District, Dongxi village,

31°35′18″ N, 110°07′53″ E, alt. 621 m, 01.VII 2018, 6 ♂, coll. by Xinyue Wang and Ping

Wang.

REDESCRIPTION. Male ( Figs 1, 2 ). Body length: 10.68–14.05 mm (measured from apical margin of clypeus to abdominal apices), humeral width: 2.32–3.40 mm.

Body dark reddish brown. Head black except for mandibles dark reddish brown with black apex, maxillary and labial palpi light yellow. Antennae dark brown to blackish brown,

antennomere XI blackish brown except for apical light yellow. Pronotum blackish brown.

Elytra reddish yellow or yellow with blackish brown or black apex, or elytra uniform black reddish brown. Ventral surface reddish brown to blackish brown, blackish brown in prosternum excluding metacoxa and metacoxal cavity reddish brown; abdominal ventrites light reddish brown, lighter in distal two ventrites. Legs light yellow, extreme base of pro- and mesotibiae and base of metatibiae blackish brown; femoral clubs reddish brown to blackish brown.

Body thinly clothed with short yellow pubescence; pronotum sparsely clothed with light yellow pubescence, slightly denser near basal margin. First five or six antennomeres fringed with suberect yellowish brown setae ventrally. Ventral surface with sparse light yellow pubescence. Legs moderately clothed with suberect light yellow pubescence, metafemoral clubs densely furnished with longer and denser suberect blackish brown pubescence, metatibiae with a tuft of long yellow bristles, the length of bristles about 0.80 times as long as metatibiae.

Head with frons short, transverse, with an obvious longitudinal median sulcus; frons densely, coarsely punctured, lateral sides moderately concave. Eyes coarsely faceted and deeply emarginate; gena extremely short, distinctly shorter than lower eye lobe. Antennae shorter than body, about 0.72–0.80 times as long as body; scape slightly arched, weakly thickened apically, sparsely, finely punctured; scape slightly longer than antennomere III, antennomeres

III–V nearly equal in length, antennomeres VI–X gradually decreasing in length, antennomere

XI sharply pointed apically; antennomeres V–IX obviously expanded apically.

Pronotum subequal in length and basal width, about 1.13 times as long as apical width,

transversely swollen just behind apex, lateral tubercles situated at middle, rounded apically;

disc with three distinct callosities, of which the postmedian one relatively small, elongate drop-shaped, and one on each side of the middle, semi-elliptical; disc with a few coarse punctures in parts of depressed areas, glabrous on callosities.

Scutellum trapezoidal, shallowly emarginate at apex.

Elytra about 1.45–1.58 times as long as humeral width, exposing the sides of metathorax;

sides weakly projected at humeri, almost straightly narrowed to acutely rounded apices; suture strongly arcuately dehiscent from near middle; disc almost flattened, sparsely provided with medium-sized punctures, though punctures becoming shallower near scutellum and apical part.

with sternites VIII and IX; 7, 8 – tegmen; 9–11 – median lobe; 5, 7, 9 – ventral view; 6, 8, 10 –

dorsal view; 11 – lateral view. Scale bar: 0.5 mm.

Ventral surface sparsely, finely punctured. Abdomen with first ventrite longest, shorter than following two segments combined, ventrite V shortest and arcuate at apical margin; anal ventrite concave at middle of apical margin.

Legs long and slender, metafemur strongly swollen; metatibia nearly straight, with a pair of long ventral apical teeth; first metatarsal segment slightly shorter than following two segments combined; claws divergent.

Male genitalia ( Figs 5–11 ). Median lobe spindle shaped, moderately curved, distinctly longer than tegmen; median struts about half length of median lobe. Tegmen with unilobed paramere, almost straight line to apical sixth, then arcuate narrowed to apices, slightly concave in middle, length 1.19 times as long as wide, with sparse and medium sized setae; ring part with a stubby stem at each apical corner. Tergite VIII nearly transverse, deeply emarginate at middle of apical margin; length 1.67 times as long as wide, with sparse and medium sized setae. Sternites VIII deeply emarginate at middle of apical margin, with sparse and medium sized setae on the inner side of each apical corner.

DISTRIBUTION. Vietnam, China: Hubei (new country record).

HABITAT. Specimens were collected on Castanea mollissima Bl. in Shennongjia Forestry

District, Hubei, China.

Figures

Figs 1–4. Habitus of Merionoeda spp. males. 1, 2 – M. curtipennis (Pic, 1922); 3 – M. jeanvoinei Pic, 1933; 4 – M. indica (Hope, 1831); 1, 3, 4 – dorsal view; 2 – ventral view.

Figs 5–11. Male genitalia of Merionoeda curtipennis (Pic, 1922). 5, 6 – tergite VIII

Figs 12, 13. Alive specimens of Merionoeda from Hubei Province. 12 – M. jeanvoinei Pic, 1933; 13 – M. curtipennis (Pic, 1922).

Figs. 14–16. Holotype of Merionoeda curtipennis Pic, 1922, male. 14 – habitus, dorsal