Linan hujiayaoi, Yin & Li, 2013

Yin, Zi-Wei & Li, Li-Zhen, 2013, Five new species of the genera Labomimus and Linan from Guangxi, South China (Coleoptera: Staphylinidae: Pselaphinae), Acta Entomologica Musei Nationalis Pragae 53 (1), pp. 141-153 : 150-153

Linan hujiayaoi sp. nov.

( Figs 4C , 7 , 8D )

Type locality. China, Guangxi Province, Jinxiu County, Sheng-Tang-Shan Mt., ca. 1700 m a.s.l., 23°58′51″N, 110°06′06″E.

Type material (4 JJ, 7 ♀♀). HOLOTYPE: J, labeled ‘ CHINA: Guangxi Prov. / Jinxiu County / Shengtangshan Mt. / 26.vii.2011, 1650– 1800 m / Jia-Yao Hu leg. // HOLOTYPE (red) / Linan hujiayaoi / sp. n., Yin & Li / det. 2012, SNUC’. PARATYPES: 3 JJ, 7 ♀♀, same label data as holotype ; 2 ♀♀, same label data, except ‘ 1400–1600 m / Zi- Wei Yin leg.’ All paratypes bear the following label: ‘ PARATYPE (yellow) / Linan hujiayaoi / sp. n., Yin & Li / det. 2012, SNUC’.

Diagnosis. Reddish brown; medium-sized; postgenae rounded; antennomeres IX–XI enlarged, lacking obvious modification; pronotum with lateral margins rounded; with short thick metaventral processes; metatrochanter spinose ventrally; aedeagus with nearly symmetric median lobe.

Description. Male ( Fig. 4C ). Length 2.42–2.46. Head longer than wide, HL 0.60–0.61, HW 0.52–0.53; eyes each composed of about 20 facets.Antennal club as in Fig. 7A . Pronotum ( Fig. 8B ) slightly longer than wide, PL 0.57–0.58, PW 0.52–0.53, with lateral margins rounded. Elytra wider than long, EL 0.64–0.65, EW 0.88–0.92. Short and thick metaventral processes nearly triangular ( Fig. 7C ). Protrochanters and profemora simple ( Fig. 7D ), mesotrochanters ( Fig. 7E ) with tiny ventral spine, metatrochanters ( Fig. 7F ) with short hook-like ventral spine. Abdomen large, AL 0.61–0.62, AW 0.91–0.97. Sternite IX as in Fig. 7G . Aedeagus length 0.37; with nearly symmetric median lobe ( Figs. 7H–J ).

Female. Similar to male in general; BL 2.33–2.43, HL 0.56–0.60, HW 0.48–0.51, PL 0.55–0.56, PW 0.51–0.52, EL 0.57–0.59, EW 0.89–0.92, AL 0.65–0.68, AW 0.96–0.97. Eyes each composed of about 20 facets. Antennae simple; metaventral processes absent.

Comparative notes. This is placed as a member of the L. chinensis group by the unmodified antennal clubs in the male. The new species is most close to L. chinensis (Löbl, 1964) by sharing the short metaventral process. The two species can be separated by the transverse antennomeres VIII and X in L. hujiayaoi , while L. chinensis has elongate antennomeres VIII and X.

Etymology. This species is named after Jia-Yao Hu, who collected all the male specimens of the type series.

Biology. Individuals were collected by sifting leaf litter of a coniferous broad-leaved forest near the peak of the mountain ( Fig. 8D ).

Distribution. South China: Guangxi.

Revised key of YIN et al. (2011) to males of Linan

An error was detected in the original key: the two species-group names in the first two couplets were mistakenly interchanged. This revised key makes all the necessary corrections.

1. Antennae have antennomeres IX–X strongly modified ( YIN et al. 2011: 128, Figs 7 , 9, 11; Figs. 5A , 6A ). L. cardialis- group. ................................................................................. 2

– Antennae have antennomeres IX–X lacking obvious modification ( YIN et al. 2011: 128, Figs 8 , 10; Fig. 7A ). L. chinensis- group. ...................................................................... 7

2. Pronotal lateral margins roundly expanded basolaterally. (South China: Yunnan). .......... ......................................................................................... L. tendothorax Yin & Li, 2012

– Pronotal lateral margins evenly rounded, not basolaterally expanded. .......................... 3

3. Large-sized, over 3.3 mm; tergite IV about four times as long as tergite V. ( Thailand: Wiang Pa Pao; Southwest China: Yunnan). ............................. L. cardialis Hlaváč, 2002

– Medium-sized, less than 3 mm; tergite IV about twice the length of tergite V. ............. 4

4. Protibiae lacking apical spur. (South China: Guangxi). ........... L. huapingensis sp. nov.

– Protibiae with apical spur. .............................................................................................. 5

5. Pronotal and elytral basolateral margins with tuft of dense setae; protibiae with apical spur indistinct. (South China: Guangxi). ...................................... L. fortunatus sp. nov.

– Pronotal and elytral basolateral margins lacking tuft of dense setae; protibiae with distinct apical spur. ...................................................................................................................... 6

6. Median metaventral processes not bifurcate at apex in lateral view ( YIN et al. 2011: 128, Fig. 21). (Southwest China: Guizhou). ............................ L. megalobus Yin & Li, 2011

– Median metaventral processes bifurcate at apex in lateral view ( YIN et al. 2011: 128, Fig. 19). (South China: Hainan). .......................................................... L. hainanicus Hlaváč

7. Median metaventral processes long ( YIN et al. 2011: 128, Fig. 20). (East China: Anhui). .............................................................................................. L. inornatus Yin & Li, 2011

– Median metaventral processes short ( YIN et al. 2011: 128, Fig. 18; Fig. 7C ). ............... 8

8. Antennomeres X and VIII more or less transverse ( Fig. 8A ); metaventral processes with pointed apex ( Fig. 7C ); metatrochanter protuberant ventrally ( Fig. 7F ). (South China: Guangxi). ........................................................................................ L. hujiayaoi sp. nov.

– Antennomeres X and VIII elongate ( YIN et al. 2011: 128, Fig. 8 ); metaventral processes with bluntly rounded apex ( YIN et al. 2011: 128, Fig. 18); metatrochanter simple. (East China: Zhejiang). ..................................................................... L. chinensis (Löbl, 1964)

Figures

Fig. 4. Male habitus of Linan spp. A – L. fortunatus sp. nov; B – L. huapingensis sp. nov.; C – L. hujiayaoi sp. nov. Scales: 1 mm.

Fig. 7. Diagnostic features of male Linan hujiayaoi sp. nov. A – antennal club; B – pronotum; C – metaventral process, lateral view; D – protrochanter and profemur; E – mesotrochanter and mesofemur; F – metatrochanter and metafemur; G – sternite IX; H – aedeagus, dorsal view; I – same, lateral view; J – same, ventral view. Scales:A, B, D, E, F = 0.3 mm; C, H, I, J = 0.2 mm; G = 0.05 mm.

Fig. 8. Habitats of the new species.A – Maoershan Mt., 2000 m; B – Huaping N.R., 1700 m; C – Lianhuashan Mt., 1100 m; D – Shengtangshan Mt., 1700 m.

Fig. 5. Diagnostic features of male Linan fortunatus sp. nov.A – antennal club; B – pronotum; C – metaventral process, lateral view; D – apical spur of protibia; E – protrochanter and profemur; F – mesotrochanter and mesofemur; G – metatrochanter and metafemur; H – sternite IX; I – aedeagus, dorsal view; J – same, lateral view; K – same, ventral view. Scales: A, B, E, F, G = 0.3 mm; C, I, J, K = 0.2 mm; H = 0.1 mm; D = 0.05 mm.

Fig. 6. Diagnostic features of male Linan huapingensis sp. nov. A – antennal club; B – pronotum; C – metaventral process, lateral view; D – protrochanter and profemur; E – mesotrochanter and mesofemur; F – metatrochanter and metafemur; G – sternite IX; H – aedeagus, dorsal view; I – same, lateral view; J – same, ventral view. Scales: A, B = 0.3 mm; C, D, E, F, H, I, J = 0.2 mm; G = 0.05 mm.