Minilimosina (Svarciella) obtusispina Su, 2013

Su, Lixin, Liu, Guangchun & Xu, Jie, 2015, A review of Minilimosina Roháček (Diptera: Sphaeroceridae) from China, Zootaxa 4007 (1), pp. 1-28 : 19-20

Minilimosina (Svarciella) obtusispina Su, 2013

( Figs. 78–82 )

Minilimosina (Svarciella) obtusispina Su et al., 2013: 19 [male, description, illustr.]. Type locality: China, Jiangxi, Guanshan, Donghe, HT male (LKLSU).

Diagnosis. Male. General colour shining black, including face, gena, thorax and abdomen; antennae reddish brown; frons rather dark reddish brown. Haltere with white stem and shining black knob. Two orbitals. Anterior dorsocentral seta half as long as posterior dorsocentral, the latter slightly shorter than scutellum length. Lateral scutellar seta subequal to scutellum length, lateral scutellar seta 0.8 times as long as apical scutellar. Legs shining black except for trochanters, apical parts of femora, basal and apical parts of tibiae, mid and hind tarsi reddish brown, and fore tarsus dark brown. Mid tibia: proximal anterodorsal seta longer than distal anterodorsal, distal dorsal seta slightly longer than width of mid tibia, apical sixth of tibia with a row of short ventral setae terminating in short ventroapical seta, which is slightly shorter than width of mid tibia. Mid femur with a row of posteroventral setae. Wing and veins reddish brown, Cs2 brownish black in basal half. Sternite 6 ( Fig. 82 ) with two black, haltereshaped lobes. Abdomen heavily sclerotized.

Type material. ( LKLSU, in glycerine): Holotype, male: China, Jiangxi, Guanshan, Donghe, Malaise trap, 430 m, 20.Apr.2009, Yi Li & Lingli Yi. Paratype, male: China, Jiangxi, County Jian, Shuangjiang, Malaise trap, 23.Apr.2009, Yi Li & Lingli Yi.

Comments. Based on possible synapomorphies: sternites 5 of male with a row of comb-like spines and long spine-like setae on posterior margin, sternite 6 with a pair of posterior processes, gonostylus with 3 spines, M. guestphalica ( Duda, 1918) , M. intercepta Marshall, 1985 , M. ismayi Roháček, 1983 , M. vixa Marshall, 1985 and M. obtusispina Su, 2013 could belong to M. guestphalica species group (called incorrectly M. v-atrum group by Roháček & Marshall, 1988 because true M. v-atrum was later synonymized with M. splendens belonging to M. dissimilicosta group), in which M. intercepta , M. ismayi and M. obtusispina seem to be more closely related based on orange antennae as proposed by Marshall (1985), but relationships among them are not clear. We think that M. intercepta and M. obtusispina could be sister species according to sternite 6 of male with relatively long, apically blunt lobes, cerci of male not distinctly separated and postgonite relatively straight.

Distribution. Oriental: China (Jiangxi)

Figures

FIGURES 78 – 82. Minilimosina (Svarciella) obtusispina Su: 78, male genitalia, posterior; 79, male genitalia, lateral; 80, gonostylus, lateral; 81, aedeagus and associated structures, lateral; 82, male sternite 5, ventral.