Duolandrevus (Eulandrevus) axinus, Shi, 2017

Shi, Fu-Ming, 2017, Taxonomy of the subgenus Duolandrevus (Eulandrevus) Gorochov (Orthoptera: Gryllidae: Landrevinae: Landrevini) from China, with descriptions of three new species, Zootaxa 4317 (2), pp. 310-320 : 316-319

9. Duolandrevus (Eulandrevus) axinus sp. nov.

( Figs 8 , 11, 14 , 18–21 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:498561

Description. Male. Body medium ( Fig. 8 ), occiput somewhat convex, frontal rostrum bluntly round, slightly wider than antennal scape, antennal scape shield-shaped. Lateral ocelli, round, located at the base of side rostrum; median ocellus like half moon, located at antennal fossa. Apical joint of maxillary palpi depressed, arc-shaped, slightly equal with the third joint; apical joint of labial palpi equal with second joint, depressed and flat, truncate. Eyes medium, oval, ventral margin with a lot of fine transverse striation, inside of the bottom corner slightly protruding.

Pronotum obviously transverse, flat, with more pubescent. Anterior margin concave, posterior margin straight, about 1.7 times as long as wide. Metanotal gland developed, as in Fig. 14 ; central area of anterior margin and posterior margin concave; metanotal gland central area with few pubescent. Tegmina short, extending to base of 5th the abdominal tergite, present with 6 oblique veins, and without mirror, apical area with irregular crossvenation; with 6 longitudinal veins in lateral field; apical portions armed with reticulated veins. Fore tibiae with two tympana, oval, internal larger than external; hind tibiae armed with small spines on the basal half portion and with 4 long spines respectively on both sides at the apical half portion.

Supra-anal plate short and trapezoid ( Fig. 11 ), about 3.5 times as long as wide. Posterior margin straight, with bristle. Genitalia ( Figs. 18–21 ): Epiphallus equipped with a pair of thick median lobes; lateral lobes wide and armed with two acute apex, axe-shaped; ectoparamere longer than lateral lobes.

Female. Unknown.

Coloration. Body brown. Head light, labrum and eye brown; ocelli light yellow. Tegmina copper brown.

Measurements (mm). Body 16.8–21.9; pronotum 2.9–3.9; tegmen 6.2–8.0; hind femur 12.1–13.1.

Type material. Holotype. ♂, Weng Village , Yuanmen, Baisha, Hainan, China, 400m, 20 May, 2008, collected by Yibin Ba and Juntong Lang . Paratypes. 1♂, Hongmao , Yuanmen, Baisha, Hainan, China, 29 May, 2007, collected by Yibin Ba and Juntong Lang ; 1♂, Kaibo , Nankai, Baisha, Hainan, China, 12 June, 2007, collected by Yibin Ba and Juntong Lang ; 1♂, Yinggezui , Baisha, Hainan, China, 23 May, 2014, collected by Junyan Su .

Distribution. China (Hainan).

Diagnosis. This new species is related to Duolandrevus (Eulandrevus) dendrophilus ( Gorochov, 1988) , but can be distinguished on the shape of the lateral lobes of the epiphallus, the lateral lobe of the epiphallus bifurcate; ectoparamere longer than lateral lobes.

Etymology. This new specific name is derived from Greek axin, referring the lateral lobe of epiphallus with an axe-shaped apex

Figures

FIGURES 7 – 8. Habitus, male, dorsal view: 7. Duolandrevus (Eulandrevus) gorochovi sp. nov.; 8. Duolandrevus (Eulandrevus) axinus sp. nov.

FIGURES 9 – 14. Duolandrevus (Eulandrevus) spp. Male, dorsal view. 9, 12. Duolandreuv (Eulandrevus) ziyunensis sp. nov.; 10, 13. Duolandrevus (Eulandrevus) gorochovi sp. nov.; 11, 14. Duolandrevus (Eulandrevus) axinus sp. nov. 9 – 11. Supra-anal plate; 12 – 14, Metanotal gland.

FIGURES 18 – 21. Genitalia. Duolandrevus (Eulandrevus) axinus sp. nov.; 18. collected from Kaibo, Hainan; 19. collected from Weng Village, Hainan; 20. collected from Yinggeling, Hainan; 21. collected from Hongmao, Hainan. a, dorsal view; b, ventral view; c, lateral view.