Meiyingia holzschuhi, Liu, Bin & Wang, Cheng-Bin, 2016

Liu, Bin & Wang, Cheng-Bin, 2016, The third species of Meiyingia Holzschuh, 2010 (Coleoptera: Cerambycidae: Cerambycinae: Oemini) from China, Zootaxa 4111 (3), pp. 291-296 : 293-296

Meiyingia holzschuhi sp. nov.

( Figs. 2 B; 3C, D; 4A–G)

Type material. Holotype: CHINA, Guangxi: ♂, Laibin, Jinxiu, Dayaoshan [=Mt. Dayao], 19.IV.2015, 1077 m, Bin Liu leg. ( BITS).

Description. Male. Habitus as shown in Fig. 2 B. Body elongate, compressed and moderate-sized, 13.8 mm long, 2.3 mm wide between humeri. Head, antennae, stridulating organ, scutellum, elytra, and legs black; dark green luster distinctly present on elytra, while inconspicuously present on head and legs (green luster changed to blue after contacting EtOH solution). Pronotum ( Fig. 3 C) reddish-brown, with a boldfaced T-shaped spot, almost attaining basal margin along median line. Apex of tarsi dark brown.

Pubescence on head and pronotum less distinct. Pubescence on antennae short, dense and brown; ventral side of all antennomeres except XI fringed with long setae. Pubescence on elytral surface uniform, short, dense and pale brown. Pubescence on legs and ventral surface of body distinctly longer.

Head compressed, coarsely punctate and with coarse grain, narrower than pronotum at widest point. Frons transverse, nearly flat. Eyes small, finely facetted, divided into two widely separated lobes; lower lobes longer than genae. Interantennal region strongly concave between strongly elevated antennal tubercles. Antennae extending beyond elytral apex by 3 antennomeres; length ratio of antennomeres from base to tip: 5.5-1.0-8.8-7.8-7.0-6.4-5.9-4.3-3.7-3.1- 3.3; scape stout and cylindrical, surface with coarse grain; antennomere III longer than scape and IV; antennomeres III to V with distinct spiny processes on ventral side, and distinctly reduced on antennomeres VI and VII. Pronotum with ratio of length / width = 1.02, disc slightly convex and sparsely punctate; each side convex posteriorly, surface with wrinkles, especially distinct near anterior and posterior margins. Stridulatory organ ( Fig. 3 D) subtrapezoidal, surface glabrous, but with dense, fine, transverse stridulatory file. Scutellum ( Fig. 3 D) ligulate, concave at middle, surface glabrous but microreticulate.

Elytra 4.2 times longer than humeral width, narrowing towards apices; apices narrowly rounded; disc punctate and with coarse grain.

Profemora stouter than meso- and metafemora. Metafemora exceed the posterior edge of second visible abdominal segment. 1st metatarsomere longer than following two tarsomeres combined.

Metasternum with a longitudinal depression at posterior half along midline. Prosternal process distinctly short. Abdomen finely punctate. Tergite VIII ( Fig. 4 A) with round posterior edge bordered with long setae. Sternite VIII ( Fig. 4 A) with round posterior edge, bordered with much shorter setae. Sternite IX ( Fig. 4 A) ‘Y’-shaped.

Male genitalia as shown in Figs. 4 B–D. Lateral lobes ( Fig. 4 E) of tegmen moderately elongate, widely subrounded at apex with long setae. Median lobe stout, median struts more than half length of median lobe; ventral plate longer than dorsal plate; ventral plate ( Fig. 4 F) with apex narrowly rounded. Endophallus with rod anchor-shaped at base ( Fig. 4 G).

Female. Unknown.

Distribution. China (Guangxi).

Etymology. The specific epithet is dedicated to Dr. Carolus Holzschuh, famous Cerambycidae taxonomist, for his erection of the genus Meiyingia and kind assistance with our study.

Remarks. The species in the genus Meiyingia Holzschuh strongly resemble each other, however, characteristics of the pronotum provide good criteria to distinguish them: in M. holzschuhi sp. nov., the pronotum is reddish-brown, moderately wide, with a boldfaced T-shaped pronotal spot, almost reaching basal margin along median line; in M. paradoxa Holzschuh , the pronotum is reddish-brown, relatively narrow, with an inverted subtrapezoidal pronotal spot, reaching the basal margin along median line; in M. jinyunensis Li & Chen , the pronotum is yellowish-brown, relatively wide, with a subrounded pronotal spot, margins poorly defined, at apical half of median line.

It is worth noting that Li et al. (2015) used the colour of elytra luster in their key to distinguish species. When we received the holotype of M. holzschuhi sp. nov., which has a green elytral luster, we noticed that this colour unexpectedly and irreversibly changed to a blue elytral luster, after contact with a low concentration of EtOH solution. Because of this variability, we decided not to use the colour of elytra luster in our key to species.

Figures

FIGURE 2. Meiyingia paradoxa Holzschuh, 2010 ♂ holotype: A, habitus (dorsal view). Meiyingia holzschuhi sp. nov. ♂ holotype: B, habitus (dorsal view). Scales: B = 2 mm.

FIGURE 3. Meiyingia paradoxa Holzschuh, 2010 ♂ holotype: A, pronotum (dorsal view). Meiyingia jinyunensis Li & Chen, 2015 ♂ holotype: B, pronotum (dorsal view; after Li, Tian & Chen, 2015). Meiyingia holzschuhi sp. nov. ♂ holotype: C, pronotum (dorsal view); D, stridulatory organ & scutellum (dorsal view). Scales: C = 2 mm; D = 0.5 mm.

FIGURE 4. Meiyingia holzschuhi sp. nov. ♂ holotype: A, tergite VIII, sternite VIII & IX (ventral view); B, male genitalia (dorsal view); C, male genitalia (ventral view); D, male genitalia (lateral view); E, apex of lateral lobes (dorsal view); F, apex of median lobe (ventral view); G, base of endophallus (dorsal view). Scales: B – D = 0.5 mm; rest, 0.1 mm.