Lacvietina lii ( Li, Tang & Zhu, 2007 )

Chang, Yuan, Li, Li-Zhen & Yin, Zi-Wei, 2019, A contribution to the knowledge of the genus Lacvietina Herman (Coleoptera Staphylinidae: Tachyporinae) from China, Zootaxa 4664 (4), pp. 574-580 : 576-579

Lacvietina lii ( Li, Tang & Zhu, 2007)

( Figs 2–4 )

Peitawopsis lii Li, Tang & Zhu, 2007: 266 .

Lacvietina lii ; Schülke 2015: 8.

Type locality. Lianhuaping , Leigong Mountain, 1450–1500 m, Guizhou Province, China .

Type material examined. Holotype: ♂: ‘ Lianhuaping (ÃAENj), Mt. Leigong (D ḢƜ), Guizhou Prov., alt. 1450–1500 m, 15.xi.2005, Li-Long Zhu leg.’ ( SNUC).

Additional material examined. 28 ♂♂, 30 ♀♀: ‘ China: Guangdong, Shenzhen City, Luohu District (# Ȑk ), Mt. Wutong (Ő ḆƜ), Main Peak Dawutong , 22°34’56.24’’N, 114°12’52.70’’E, 579–934 m, 29.iv.2019, sifted, Cheng, Miao, Xia & Zhang leg. ’; 3 ♂♂, 1 ♀: ‘also from Mt. Wutong, Taishanjian ( ĴNJ ṕ), 22°35’50.94’’N, 114°10’47.96’’E, mixed leaf litter, sifted, 900 m, 26.iii.2019, Tang, Shuai, Zhao, Zhou & Xia leg. ’; 8 ♂♂, 5 ♀♀: same label data, except ‘ 400 m, 27.iii.2019 ’; 1 ♀: ‘ China: Hainan Prov., Lingshui Country (ỄAEn), Mt. Diaoluo ( RƤƜ), winding road, 18°42’ N, 109°52’ E, alt. 600–1000 m, 26.iv.2012, Peng & Dai leg. ’; 1 ♂: ‘ China: Guangxi Prov., Lingui Dis., Huaping N. R. ( AEḦĦḾḄÊỮ), Anjiangping (Îä "), alt. 1400–1700 m, 17.vii.2011, He W.-J. & Tang L. leg. ’; 1 ♂, 1 ♀: ‘ China: Guizhou Prov., Zunyi City, Suiyang, Kuankuoshui N. R. (ẼOi*ª ǾDZṖṈ), Houshan, 15.viii.2010, alt. 1550 m, Yin Z.-W. leg. ’; 2 ♂♂: same label data, except ‘ Gongtonggou , 13.viii.2010 ’; 1 ♂: same label data, except ‘nr. Station , alt. 1400 m, 11.viii.2010, Feng & Yin leg. ’ (all in SNUC).

Redescription. Male. Habitus as in Fig. 2A ; TBL 3.62–3.78 mm, FBL 2.15–2.31 mm; head, pronotal disc, elytra, abdomen, and most parts of legs dark reddish-brown, lateral and basal margins of pronotum, posterior areas of tergites, and tarsi yellowish-brown. Head sub-triangular, HL 0.34–0.40 mm, HW 0.67–0.70 mm, with distinct punctures, without microsculpture; eyes prominent, EyL 0.15–0.17 mm; antennae elongate, AnL 1.55–1.65 mm, relative lengths of antennomeres 1–11: 1.5: 1.1: 1.5: 1.3: 1.2: 1.2: 1.1: 1.1: 1: 1: 1.6; antennomeres 1–2 glabrous, 3–11 with dense pubescence. Pronotum strongly transverse, PL 0.62–0.70 mm, PW 1.32–1.40 mm, PL/PW = 0.47–0.50, with punctures similar to those of head, without microsculpture. Elytra transverse, EL 0.92–1.05 mm, EW 1.22–1.27 mm, EL/EW = 0.75–0.82, with punctures similar to those of pronotum, without microsculpture, with slightly produced posterolateral angles. Abdominal surface with fine pubescence, without microsculpture; tergite VIII ( Fig. 3A ) with four lobes; inner lobes longer than outer ones; sternite V and VI ( Fig. 3B ) with glabrous sub-triangular depres- sion at middle of posterior marginal area; sternite VII ( Fig. 3C ) with posterior margin broadly emarginate, granules regularly arranged along posterior margin and sparsely arranged along midline of sternite; sternite VIII ( Fig. 3D ) with four lobes, deeply incised between inner lobes, mid-length 0.68 times as long as depth of incision. Length of aedeagus ( Fig. 4 ) 0.71–0.76 mm, parameres elongate and asymmetric, right paramere longer than left one in ventral view, apex of parameres curved ventrally in lateral view; median lobe broad at base and narrowing toward apex.

Female. General habitus ( Fig. 2B ) similar to male. Measurements: TBL 3.55–3.74 mm, FBL 2.23–2.31 mm, HL 0.49–0.52 mm, HW 0.68–0.71 mm, EyL 0.18–0.22 mm, AnL 1.51–1.62 mm, relative lengths of antennomeres 1–11: 1.5: 1.1: 1.4: 1.3: 1.2: 1.1: 1.1: 1.1: 1.1: 1: 1.4, PL 0.64–0.68 mm, PW 1.32–1.36 mm, PL/PW = 0.48–0.50, EL 0.94–0.98 mm, EW 1.28–1.32 mm, EL/EW = 0.73–0.74. Tergite VIII ( Fig. 3E ) with five lobes, median protrusion slightly longer than inner and outer pair of lobes, with pointed apex; sternite VII ( Fig. 3F ) with two long bristles, sternite VIII ( Fig. 3G ) with six lobes, with fimbriate lobes broader and longer than others.

Comparative notes. Lacvietina lii was originally described from Leigong Mountain based on a single male. Here this species is also recorded from Guangdong, Hainan, and Guangxi. The external features of both sexes are rather stable in populations of all localities, and the males exhibit only slight differences in the configuration of the aedeagus ( Fig. 4 ). This species is most similar to L. punctatissima in the shallowly and broadly emarginate posterior margin of male sternite VII, and the laterally expanded right paramere of the aedeagus. These two species can be readily separated by the much more distinct sexual features of male sternites V–VI, the much deeper emargination of male sternite VIII, and the protruding posterior margin between the inner lobes of female tergite VIII of L. lii (the posterior margin is deeply incised between the inner lobes of female tergite VIII of L. punctatissima ).

Comments. In the original description of L. lii the authors stated ( Li et al. 2007: 267) ‘…5th and 6th sternites of male without second sexual characters…’, which was clearly a misinterpretation, and misleading. The sexual features of male sternites V–VI are distinct in the holotype, and are as such in males of all other localities ( Fig. 3B ) we have examined.

Distribution. China: Guangdong, Hainan, Guangxi (new provincial records), Guizhou.

Figures

FIGURE 2. Habitus of Lacvietina lii. A. Male. B. Female. Scale bars: 1.0 mm.

FIGURE 3. Diagnostic features of Lacvietina lii (A–D. Male. E–G. Female). A, E. Tergite VIII. B, F. Sternites IV(V)–VIII. C. Sternite VII. D, G. Sternite VIII. Scale bars: 0.2 mm.

FIGURE 4. Aedeagus of Lacvietina lii (A, C, E, G ventral; B, D, F, H lateral). A–B. Population of Leigong Mountain, Guizhou. C–D. Population of Kuankuoshui Nature Reserve, Guizhou. E–F. Population of Huaping Nature Reserve, Guangxi. G–H. Population of Wutong Mountain, Guangdong. Scale bars: 0.2 mm.