Mohrigia orthacantha ( Yang, Zhang & Yang, 1993 ) Yang, Zhang & Yang, 1993

Xu, Jun, Shi, Kai, Huang, Junhao & Wu, Hong, 2017, Review of the genus Mohrigia Menzel (Diptera, Sciaridae) from China, Zootaxa 4300 (1), pp. 71-98 : 86

Mohrigia orthacantha ( Yang, Zhang & Yang, 1993) , new combination

( Figs 8 , 14 F, 16)

Lycoriella orthacantha Yang, Zhang & Yang, 1993: 661 (type locality: Mt. Longqishan, Fujian).

Material examined. Neotype, male (here designated). China, Fujian, Wuyishan , Xingcun, Pikenkou-Shaxizhou, 27°44'55"N, 117°40'37"E; 597 m, 1-V-2014, leg. Mei Qin [SM02297] . 1 male, Inner Mongolia, Chifeng , Saihanwula Nature Reserve, Zhenggou, 44°13.198'N, 118°44.177'E, 1231 m, 23-VII-2013, leg. Mei Qin [SM01963].

Diagnosis. This species is characterized by its kidney-shaped gonostylus with two long flagellate setae on the ventral side; gonocoxite with a small setose intercoxal lobe; tegmen rounded, parameral apodeme completely sclerotized forming a central strip in dorsal view.

Description (male). Color. Head, antennae and thorax dark brown; palps, abdomen and hypopygium yellowish-brown; mesonotum brown; legs pale brown; wings fumose.

Head ( Figs 8 C, D). Eye bridge with 3 rows of facets. Prefrons with 16–17 setae. Maxillary palps 3-segmented, basal segment with 2 setae; 2nd segment with 5–6 setae; 3rd segment with 4–5 setae. Length/width index of 4th flagellomere: 3.08.

Thorax. Anterior pronotum with 1–2 setae, episternum 1 with 2–7 setae. Wings ( Fig. 14 F). Wing length 1.94 mm, width/length: 0.41. c/w: 0.68. R1/R: 0.67–0.79. r-m, stM, M1 and M2 bare, CuA1 and CuA2 bare. Legs ( Fig. 8 E). Length of spur/width of foretibia 0.89–0.98. Length of femur/length of metatarsus: foreleg 1.22–1.38. Length of metatarsus/length of tibia: foreleg 0.60–0.64, hind leg 0.48–0.68. Length of hind tibia/length of thorax 1.10– 1.31. Claws toothed.

Hypopygium ( Figs 8 A, B). The gonocoxite as long as the gonostylus. The gonostylus kidney-shaped, with ventral and dorsal margin, basally expanded and forming an angulate corner, densely setose on the apicoventral part, a subapical tooth arising from the dorsal margin, two long flagellate setae on the ventral side of gonostylus. Hypopygium with a small setose intercoxal lobe. Tegmen rounded, parameral apodeme continuously sclerotized forming a central strip on dorsal side. Sternite 10 with 1 seta on each half.

Distribution. China (Fujian, Inner Mongolia, Fig. 16 ).

Remarks. The species was described in the genus Lycoriella , with illustrations of the 4th flagellar segment of antenna, maxillary palp, apex of foretibia and terminalia. The authors provided the detailed measurements of the body and its different parts, without special attention to its terminalia structures, which indicate its affiliation with Mohrigia . It is unique in the genus in having a kidney-shaped gonostylus with a ventral and dorsal margin basally expanded, and its rounded tegmen.

However, the holotype and paratype of this species could be not found in the ZAFU collection, in which the type should have been deposited. After careful investigation, we hereby confirm that the type material is lost. The type locality is Mt. Longqishan , which is in the southeastern part of the Wuyishan mountainous area in the Fujian province of China. During a recent field survey about 200 kilometers north of this mountainous area, a male was collected in Xingcun that matches all the descriptions and illustrations provided by Yang et al. (1993). Here we designate this specimen as the neotype of the species. The diagnosis, redescription and new illustrations ( Figs 8 and 14 F) are given based on the neotype.

Figures

FIGURE 8. Mohrigia orthacantha (Yang, Zhang & Yang, 1993), male, neotype. A, left gonostylus, ventral view; B, part of hypopygium, ventral view; C, palps, lateral view; D, 4 th flagellomere, lateral view; E, apex of foretibia, posteroventral view. Scale bar = 0.10 mm.

FIGURE 14. Wings, dorsal view. A, Mohrigia cylindrata sp. nov. (holotype); B, Mohrigia globulosa sp. nov. (holotype); C, Mohrigia angusta sp. nov. (holotype); D, Mohrigia notolobos sp. nov. (holotype); E, Mohrigia scrobiculata sp. nov. (holotype); F, Mohrigia orthacantha (Yang, Zhang & Yang, 1993) (neotype). Scale bar = 0.50 mm.

FIGURE 16. Geographical distribution of Mohrigia from China. The different coloured shapes refer to different collecting sites of the species.