Lispe bivittata Stein, 1909

Ge, Ying-Qiang, Gao, Yun-Yun & Zhang, Dong, 2018, Two new synonymies in the genus Lispe (Diptera: Muscidae), Zootaxa 4457 (4), pp. 549-556 : 550

Lispe bivittata Stein, 1909

Figs. 1–4

Lispe bivittata Stein, 1909: 262 . Type locality: Indonesia, Java, Semarang.

Lispe ochracea Becker, 1910: 150 . Type locality: Yemen, Sokotra Islands.

Lispe nigrifacies Becker, 1914: 83 . Type locality: China, Taiwan.

Lispa canis Malloch, 1922: 390 . Type locality: Sri Lanka, Nilaveli.

Lispe haha Snyder, 1965: 266 . Type locality: Japan, Haha-jima Island.

Lispe guizhouensis Wei, 2006: 513 . Type locality: China, Guizhou, Mt. Fanjingshan. Syn. nov.

Material examined. 8♂♂, 3♀♀, 20-VII-2010, Huainan City , Anhui Province, China, N32°24′ E116°54′, Coll. X.Y. Wan ; 20♂♂, 16♀♀, Baoshan City , Yunnan Province, China, N25°06′ E99°09′, Coll. J. Na [ MBFU] .

Diagnosis. Male L. bivittata differs from other Lispe species by the absence of both ad on mid tibia and av on hind tibia, and the presence of mostly 6 fine hairs below scutellum on posterior margin ( Fig. 1F ). It resembles L. subbivittata but can be distinguished from the latter by the absence of dense setae rows on ad, a and av surfaces. Other distinctive characters of L. bivittata include: Occiput with black spot on top; dc reduced to 0+2; meron with hairs above hind coxa; male mostly with 5 setae (sometimes 6, 7 or 9, see the Remarks below) below strong ad on hind tibia; female without av on hind femur; fresh water associated habitat both in larva and adult stages.

Remarks. Hennig (1960: 421) redescribed L. bivittata and recorded the female to have a submedian av on hind femur. According to this character, Mou in Fan (1992: 378) described the subspecies L. bivittata subbivittata , based on a female separated from the nominate subspecies by the absence of submedian av on hind femur.

This character was adopted by Xue & Chao (1996) and Xue & Zhang (2005) to distinguish between the two subspecies. However, within our collections, there is actually no female of L. bivittata with submedian av on hind femur. To check this character, the female paralectotype of L. bivittata deposited in ZMAN was examined and it is confirmed to be without av on hind femur (kindly examined by Dr. A. C. Pont). More recently, Vikhrev (2012c) elevated L. bivittata subbivittata to the species level, which we agree with, and presented a corrected key to distinguish both sexes.

Wei (2006) reported L. guizhouensis as a new species from southwest China based on a single female specimen, which he noted “resembles L. bivittata but with no av on hind femur, and is related to L. subbivittata ” ( Wei, 2006: 514) . Now with Dr. Pont’s examination of the type, the true identity of this species is revealed: L. guizhouensis Wei, 2006 is conspecific to L. bivittata Stein, 1909 .

When viewing the series specimens of L. bivittata from Anhui, China, we discovered a range of variation on leg chaetotaxy: males from the same location (Huainan City, N32°24′ E116°54′) possess a row of 5 or 7 or 9 setae below the strong ad on hind tibia ( Fig. 2 ), while the number is relatively reduced and stables southward: consistently 5 setae as in our collections from Yunnan, China, and 5 or 6 setae as in Vikhrev’s collections from southeast Asia ( Vikhrev, 2012c: 428, 430).

Distribution. Widespread in the Oriental Region. Distribution in CHINA: Guizhou, Hainan, Hunan, Taiwan, Yunnan and Zhejiang.

Figures

FIGURE 1. Male of Lispe bivittata Stein, 1909. A, habitus, lateral view. B, head, lateral view. C, head, anterolateral view. D, head, anterior view. E, abdomen, dorsolateral view. F, scuellum, circle showing the fine hairs below, posterior view. Scale bars: A = 1.00 mm, B–F = 0.50 mm.

FIGURE 2. Variation of leg chaetotaxy on male Lispe bivittata Stein, 1909, anterior view. Specimens all from Anhui, China, with 5 (A) or 7 (B) or 9 (C) setae below strong ad on hind tibia.

FIGURE 3. Female of Lispe bivittata Stein, 1909. A, habitus, lateral view. B, head, lateral view. C, head, anterolateral view. D, head, anterior view. E, abdomen, dorsolateral view. Scale bars: A = 1.00 mm, B–E = 0.50 mm.

FIGURE 4. Abdomen and terminalia of Lispe bivittata Stein, 1909. Male terminalia: A, posterior view; B, lateral view. C, aedeagus, lateral view. Female abdomen and terminalia: D, sternite 1-5, ventral view. E, spermathecal. Scale bars: A–E = 0.25 mm.