Hemierianthus mbongueensis Yetchom & Xu, 2019

Yetchom-Fondjo, Jeanne Agrippine, Kekeunou, Sévilor, Kenne, Martin, Missoup, Alain Didier, Huang, Huateng, Ma, Libin & Xu, Sheng-Quan, 2019, A Checklist of Short-horned Grasshopper Species (Orthoptera: Caelifera) from Littoral Region of Cameroon with description of a new species of the genus Hemierianthus Saussure, 1903 (Orthoptera: Chorotypidae), Zootaxa 4706 (2), pp. 311-331 : 323-324

Hemierianthus mbongueensis Yetchom & Xu sp.nov.

http://lsid.speciesfile.org/urn:lsid: Orthoptera .species.org:TaxonName:507752

Figs. 7B , 8–9 .

Material. Holotype: male, Cameroon, Littoral Region: type locality: Kompina, Mbongue village , 04°21’25’’N, 09°35’22’’E; Coll. Jeanne Agrippine YETCHOM-FONDJO; deposited in the Entomological Museum, Shaanxi Normal University, Xi’an, Shaanxi Province, China.

Description of male: body compressed, of medium size; integument rugose; fastigium of vertex longer, upcurved, with truncate apex and median carina present; fastigial foveola present, larger; interocular distance wider; face strongly flattened; antenna filiform, much shorter than head and pronotum together and 12 segmented; pronotum strongly saddle-shaped, without lateral carinae, median carina parabolic and crossed by two sulci, posterior margin concave, obtuse; prozona longer than metazona; ventral posterior angle of lateral lobes of pronotum substraight; lateral lobes of pronotum longer than its width; anterior margin of mesosternum strongly projected; elytra and wings fully developed, exciding end of abdomen and hind knee, oblique, almost touching dorsum of apophysis in resting position, with truncate apex; tympanum absent; precostal area of tegmina expanded; lower basal lobe of hind femur longer than upper one; anterior and median femora compressed, with expanded external margins; hind femur above with one light pre-apical ring; hind tibia with a small basal lobiform expansion; hind tibia with 17 outer and 15 inner spines; first segment of hind tarsus above with three teeth; inner posterior margins of terminal lobes of abdomen clearly overlapped, curved downward at apices, with very strong odontiform apophysis having strongly incurved apical part; apex of odontiform apophysis distant to the large basal part; inner margin of apophysis toothed in the middle; posterior margin of the 9 th abdominal tergite with a triangular median expansion; median expansion of the 10 thabdominal tergite clearly longer than lateral expansions of the 9 th abdominal tergite, dorsum slightly narrow in the middle, both terminal lobes separated in apical part, with expanded and truncate apices; terminal part of cerci angularly bent; apex of cerci narrow, with a downcurved spine; subgenital plate with incomplete median carina, posterior part triangular.

Coloration: body dark brownish; face dark yellowish, with one yellowish spot between eyes; basal segment of antenna dark in basal half and light yellow in apical half; anterior and median legs light yellow; inner side of hind femur with light basal median area; hind femur with a light pre-apical ring; hind tibia dark, with two light rings; elytra dark brownish, with yellow veins; wing completely dark.

Female: unknown

Measurements. Length of male body (from anterior margin of head to apex of subgenital plate): 17.35 mm; antenna: 3.48 mm; pronotum: 3.75 mm; tegmen: 15.29 mm; wing: 13.94 mm; hind femur: 10.93 mm.

Diagnosis: The new species Hemierianthus mbongueensis Yetchom & Xu sp.nov. is similar to H. bule from Cameroon and H. descarpentriesi from Gabon, from which it differs by the characters mentioned in the table 2 below.

Distribution. Cameroon, Littoral region, Kompina, Mbongue.

Etymology. The new species is named after the type locality.

Figures

FIGURE 7. Habitus images of some short-horned grasshoppers from the subfamilies Oxyinae, Chorotypinae, Euschmidtiinae, Pyrgomorphinae and Thericleinae.

FIGURE 8. Hemierianthus mbongueensis Yetchom & Xu sp.n. male: A. Lateral view; B. Face; C. Head and pronotum lateral view; D. Vertex.

FIGURE 9. Hemierianthus mbongueensis Yetchom & Xu sp.nov. male: A. Pronotum dorsal view; B. Thorax ventral view; C. end of abdomen dorsal; D. end of abdomen lateral view.