Annamanum flavimaculatum, a new species of longhorn beetle (Coleoptera, Cerambycidae) from China

Abstract Annamanum flavimaculatumsp. nov. is described and illustrated from Guizhou and Guangxi, China. Diagnosis for distinguishing the new species to its close congeners is presented and identification key to the genus is also updated.


Introduction
The genus Annamanum Pic, 1925 is a large genus in the subfamily Lamiinae (Coleoptera, Cerambycidae) with 30 described species (Tavakilian and Chevillotte 2018) distributed in South China, Japan, Vietnam, Laos, Cambodia, India, Myanmar, and Malaysia (Lin and Ge 2017). Of these, 14 species were recorded in China (Lin and Ge 2017;Holzschuh 2017;Tavakilian and Chevillotte 2018). With the specimens collected from Leigonshan area of Leishan County, Guizhou Province, and Maoershan and Lingui, Guangxi Province, China, a new species of the genus is discovered and described as Annamanum flavimaculatum in this article. In addition to A. albisparsum (Gahan, 1888), A. lunulatum (Pic, 1934), and A. magnum Holzschuh, 2017, this is the fourth Annamanum species recorded in the Leigongshan area.

Materials and methods
Specimens were collected by two collecting methods: net sweeping and six level Lindgren funnel traps (Sanyong Biologic Techonology Ltd, Xiamen, Fujian Province, China) with 99% ethanol as lure. Collected specimens were pinned or glued on pinned paper cards. Labels were handwritten or printed in Chinese. Materials from Guizhou are preserved in the School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou, China. Materials from Guangxi are preserved in Collection of Wen-Xuan Bi, Shanghai, China.
Specimen examination and dissection were conducted under an AmScope SM-4TZ stereomicroscope. Adults were photographed with Canon EOS 6D digital camera equipped with EOS MP-E 65 lenses. Male genitalia were photographed with Olympus DP22 camera mounted on an Olympus SZX7 stereomicroscope.
The collection acronyms used in the text are as follows:  Differential diagnosis. The new species can be distinguished from its congeners by its unique elytral pattern: apical half of elytron mostly covered with dense yellow hairs that compose a large yellow marking; black hair clustered as dots near suture on the anterior half of the yellow marking, sometimes weakly forming a line, and then obliquely extending from suture backwards to elytral margin; small black hair clusters sparsely scattered within the yellow marking.

CBWX
Description tured, vertex densely punctured, both frons and vertex covered with dense yellow hairs. Antennae of males exceed apex of elytra by six antennomeres; of females by five antennomeres; antennal tubercles strongly raised; scape and pedicel black, covered with long hairs, not erect but flat towards apex; cicatrix complete, narrow; rest of the antennomeres reddish brown, sparsely covered with white yellowish hairs; base and apex of each antennomere are covered with darker hairs. Eyes deeply emarginated; lower lobe twice as high as gena and one-fourth as wide as frons width between lower lobes of eyes. Labium with small sparse punctures and sparse long dark brown hairs. Mandibles with dense long yellow hairs at outer side and sparse hairs on the front. Thorax: Pronotum black with coarse granules, covered with yellow hairs, whose thickness varies among individuals; disk slightly raised; a small callus at each side of the apical margin, not extending beyond middle. Lateral spines strong, acute, slightly posteriorly and upwards curved. Sternum reddish brown, covered with dense yellow hairs. Scutellum covered with dense white yellowish pubescence, apex rounded. Mesosternal intercoxal process with a slightly projected antero-ventral tubercle ( Figure  1c). Elytra: gradually tapered in male, less tapered in female, with irregular coarse granules obliquely protruding backwards and gradually smaller posteriorly. Basal fifth bulged between humeri and scutellum. Basal half black, intermingled with yellow and black hairs; black hairs forming a broad transverse black band at the middle, nearly reaching suture. Apical half reddish brown, without granules but with coarse small punctures, mostly covered by yellow hairs forming a large yellow marking with intermingled black hair dots; some of these dots are near suture on the anterior half of the yellow marking and weakly form a line which extends obliquely towards outer margin of elytron from middle of the marking; black dots larger in female. Apex nearly rounded, slightly truncated in inner half. Legs: with dense white yellowish pubescence; femora dark brown, clubbed, not cylindrical, with sparse small punctures; tibiae reddish brown. Abdomen: reddish brown, ventrites with white yellowish pubescence intermingled with sparse punctures. Pygidium shallowly truncated at apex, deeper at the middle in some males. The sexual dimorphism is not very conspicuous. Male genitalia (Figure 3): Tegmen (Figure 3a-c), lateral lobes gradually narrowing towards apices, each apex rounded with setae that are shorter than half of lateral lobe. Median lobe (Figure 3d-f ) moderately curved, median struts about half the length of median lobe, ventral plate truncated at apex, slightly concave in the middle. Female genitalia ( Figure 4): bursa copulatrix and spermatheca small and short; spermathecal duct and spermathecal gland long, apex of spermathecal gland winded up like a spiral, but with the winding up part not completing a circle. Etymology. The name refers to the yellow patch on the apical half of elytron. Distribution. China: Guizhou, Guangxi.