Mohrigia ovoidea Xu & Huang, 2017

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 : 86-87

Mohrigia ovoidea Xu & Huang , sp. nov.

( Figs 9 , 15 A, 16)

Material examined. Holotype, male. China, Fujian. Wuyishan, Xingcun, Xianfengling , 27°43'30"N, 117°39'36"E, 2-V-2014, leg. Mei Qin [SM02450].

Diagnosis. The species is characterized by its ovate gonostylus with a strong apical tooth arising from a dorsal lobe, with two flagellate setae on the ventral mesial margin of gonostylus; hypopygium without an intercoxal lobe, only bearing three slightly long setae on the intercoxal area; tegmen triangular, parameral apodeme continuously sclerotized forming a central strip on dorsal side.

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

Head ( Figs 9 D, E). Eye bridge with 3 rows of facets. Prefrons with 6 setae. Maxillary palps 3-segmented, basal segment with 1 seta; 2nd segment with 6 setae; 3rd segment with 5 setae. Length/width index of 4th flagellomere: 3.74.

Thorax. Anterior pronotum with 2 setae, episternum 1 with 3 setae. Wings ( Fig. 15 A). Wing length 1.92 mm, width/length: 0.38. c/w: 0.71. R1/R: 0.48. r-m, stM, M1 and M2 bare, CuA1 and CuA2 bare. Legs ( Fig. 9 F). Length of spur/width of foretibia 1.00. Length of femur/length of metatarsus: foreleg 1.57. Length of metatarsus/length of tibia: foreleg 0.52, hind leg 0.35. Length of hind tibia/length of thorax 1.01. Claws toothed.

Hypopygium ( Figs 9 A–C). The gonocoxite as long as the gonostylus. The gonostylus ovate, densely setose on the apicoventral part, with a strong apical tooth arising from a dorsal lobe, two flagellate setae on the ventral mesial margin of gonostylus present. Intercoxal lobe of hypopygium absent, only bearing three slightly long setae on the intercoxal area. Tegmen triangular, parameral apodeme continuously sclerotized forming a central strip on dorsal side. Aedeagus relatively short. Sternite 10 with 1 seta on each half.

Distribution. China (Fujian, Fig. 16 ).

Remarks. The new species resembles M. angusta ( Figs 1 A, B) in having an ovate gonostylus with the subapical the tooth arising from a dorsal lobe, and the intercoxal lobe absent. The difference is mainly in the form of their ovate gonostylus, which is twice as long as wide in the new species, while M. angusta has a slender gonostylus that is about three times as long as wide.

Etymology. This species is named after its ovate gonostylus, from the Latin adjective ovoideus, meaning ovate.

Figures

FIGURE 1. Mohrigia angusta sp. nov., male. holotype. A, right gonostylus, ventral view; B, right gonostylus, dorsal view; C, gonocoxite, ventral view; D, palps, lateral view; E, 4 th flagellomere, lateral view; F, apex of foretibia, posteroventral view. Scale bar = 0.10 mm.

FIGURE 9. Mohrigia ovoidea sp. nov., male, holotype. A, right gonostylus, dorsal view; B, right gonostylus, ventral view; C, gonocoxite, ventral view; D, palps, lateral view; E, 4 th flagellomere, lateral view; F, apex of foretibia, posteroventral view. Scale bar = 0.10 mm.

FIGURE 15. Wings, dorsal view. A, Mohrigia ovoidea sp. nov. (holotype); B, Mohrigia inflata sp. nov. (holotype). C, Mohrigia truncatula sp. nov. (holotype); D, Mohrigia megalocornuta (Mohrig & Menzel, 1992). 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.