Linan chinensis ( Löbl, 1964 ),

Yin, Zi-Wei, Li, Li-Zhen & Zhao, Mei-Jun, 2011, A review of the genus Linan (Coleoptera: Staphylinidae: Pselaphinae), Acta Entomologica Musei Nationalis Pragae 51 (1), pp. 123-135 : 127-129

Linan chinensis ( Löbl, 1964)

( Figs. 2 , 8 , 13, 18 , 29–30, 38 , 42 , 44 )

Lasinus chinensis Löbl, 1964: 45 . Linan chinensis: HLAVÁČ (2002: 294) ; HLAVÁČ & CHANDLER (2005: 110).

Type locality. East China, West Tianmushan Mountain.

Material studied (19 JJ 8 ♀♀). 2 JJ 1 ♀, ‘ CHINA: ZHEJIANG Prov. / Lin’an Count. / West Tianmushan Mt. / alt. 800–1,150 m, 19.v.2006 / HU & TANG leg .’; 7JJ 3♀♀, ‘ CHINA: ZHEJIANG Prov. / Longwangshan Mt. / Dong’guan / alt. 1,300 m, 24.v.2009 / FENG, LIU, YUAN & YIN leg .’; 3 JJ 2 ♀♀, ‘ CHINA: ZHEJIANG Prov. / Longwangshan Mt. / Parking lot / alt. 1,300 m, 27.v.2009 / YUAN leg .’; 1 J, ‘ CHINA: ZHEJIANG Prov. / Longwangshan Mt. / Qianmutian / alt. 1,300 m, 27.v.2009 / YUAN leg .’; 6 JJ 2 ♀♀, ‘ CHINA: ZHEJIANG Prov. / Longwangshan Mt. / Qianmufeng / alt. 1,500 m, 29.v.2009 / FENG, LIU, YUAN & YIN leg.’ (all SNUC) .

Diagnosis. Medium sized, 2.77–2.89 mm. Antennal club weakly defined in male, not modified. Metaventral horn-like processes very short. Legs unmodified, without spines. Protibia not expanded at apex in both sexes.

Redescription. Male ( Fig. 2 ). Length 2.77–2.89 mm (2.9 mm in LÖBL (1964: 45)). Head slightly longer than wide, HL 0.63–0.64 mm, HW 0.51–0.52 mm; eyes small, each composed of about 20 facets.Antenna with scape elongate, about 4.4 times as long as wide, antennomeres II–VII each longer than wide, VIII shorter, antennal club as in Fig. 8 , not modified.

Pronotum ( Fig. 13 ) about as long as wide, PL 0.57–0.59 mm, PW 0.57–0.58 mm. EL 0.78–0.80 mm, EW 1.02–1.08 mm. Metaventral horn-like processes ( Fig. 18 ) short and rounded at apex in lateral view. Protibia cylindrical at apex, lacking medial expansion.

Abdomen large, AL 0.79–0.86 mm, AW 1.07–1.13 mm; first visible tergite (morphologically tergite IV) about twice as long as the second; discal carinae absent; sternite IX as in Fig. 38 . Aedeagus 0.40 mm long, structure as in Figs. 29–30 .

Female. Similar to male in size; BL 2.80–2.88 mm, HL 0.64–0.66 mm, HW 0.54–0.55 mm, PL 0.59–0.60 mm, PW 0.58–0.59 mm, EL 0.64–0.67 mm, EW 1.10–1.11 mm, AL 0.93–0.95 mm, AW 1.17–1.20 mm. Eyes each composed of about 20 facets.

Distribution and habitat. This species is found only in Tianmushan mountains (including Longwangshan Mountain), Zhejiang Province (East China). Specimens were sifted from leaf litter on the floor of a coniferous and broad-leaf forest ( Fig. 44 ).

Remarks. This species belongs to the L. chinensis species-group due to the absence of obvious modifications of the antennal club. It is most closely allied to L. inornatus sp. nov., but may be distinguished by the relatively broader elytra and abdomen in contrast to the pronotum (PW: EW: AW = 1.00: 1.88–1.90: 2.02–2.03 in L. chinensis , = 1.00: 1.62–1.64: 1.75–1.78 in L. inornatus sp. nov.), the shorter metaventral processes, and the different shape of the aedeagus.

Figures

Figs. 1–4. Male habitus of Linan spp. 1 – L. cardialis Hlaváč, 2002; 2 – L. chinensis (Löbl, 1964); 3 – L. hainanicus Hlaváč, 2002; 4 – L. inornatus sp. nov.

Figs. 7–11.Antennal segments VIII–XI of Linan spp. in male. 7 – L. cardialis Hlaváč, 2002; 8 – L. chinensis (Löbl, 1964); 9 – L. hainanicus Hlaváč, 2002; 10 – L. inornatus sp. nov.; 11 – L. megalobus sp. nov. Scales: 0.3 mm.

Figs. 12–21. Pronotum and metaventral horn-like processes of Linan spp. in male. 12, 17 – L. cardialis Hlaváč, 2002; 13, 18 – L. chinensis (Löbl, 1964); 14, 19 – L. hainanicus Hlaváč, 2002; 15, 20 – L. inornatus sp. nov.; 16, 21 – L. megalobus sp. nov. Scales: 0.2 mm.

Figs. 27–41. Aedeagus and sternite IX of Linan spp. 27, 29, 31, 33, 35 – aedeagus, in dorsal view; 28, 30, 32, 34, 36 – aedeagus, in lateral view; 37–41 – sternite IX of Linan spp. 27, 28, 37 – L. cardialis Hlaváč, 2002; 29–30, 38 – L. chinensis (Löbl, 1964); 31–32, 39 – L. hainanicus Hlaváč, 2002; 33–34, 40 – L. inornatus sp. nov.; 35–36, 41 – L. megalobus sp. nov. Scales: 0.2 mm (a, b, c, d, e); 0.1 mm (f, g, h, i, j).

Fig. 42. Distribution of the genus Linan Hlaváč, 2002. Black squares – L. cardialis Hlaváč, 2002; white triangle – L. chinensis (Löbl, 1964); white squares – L. hainanicus Hlaváč, 2002; white circle – L. inornatus sp. nov.; black circle – L. megalobus sp. nov.; black triangle – L. sp. indet.

Figs. 43–48. Habitats of the genus Linan Hlaváč, 2002. 43 – Nabanhe Nature Reserve, Yunnan (L. cardialis Hlaváč, 2002); 44 – Longwangshan Mountain, Zhejiang (L. chinensis (Löbl, 1964)); 45 – Bawangling Nature Reserve, Hainan (L. hainanicus Hlaváč, 2002); 46 – Tianzhushan Mountain, Anhui (L. inornatus sp. nov.); 47 – Kuankuoshui N. R., Guizhou (L. megalobus sp. nov.); 48 – Sanqingshan Mountain, Jiangxi (L. sp. indet.).