Batriscenellus femoralis Yin & Li

Yin, Zi-Wei, Li, Li-Zhen & Zhao, Mei-Jun, 2011, Batriscenellus Jeannel (Coleoptera, Staphylinidae, Pselaphinae) redefined, with notes on the Chinese species, Zootaxa 3016, pp. 37-50 : 48

Batriscenellus femoralis Yin & Li , new species

( Figs. 2 , 7 , 18, 24, 28 , 31 )

Type material. Holotype: 3, labeled ‘ CHINA: Zhejiang Prov. / Longwangshan Mt. / Parking lot / alt. 1.3 km, 17.v.2009 / YUAN leg.’. Paratypes: 15 3, 15 ƤƤ, same label data as holotype; 2 3, 3 ƤƤ, same label data, but ‘alt. 1.3 km, 25.v.2009, FENG, LIU, YUAN & YIN leg.’; 2 3, 3 ƤƤ, same label data, but ‘Dongguan / alt. 1.1 km, 26.v.2009 ’; 5 3, 1 Ƥ, same label data, but ‘alt. 1.5 km, 29.v.2009 ’; 3 3, 6 ƤƤ, same label data, but ‘alt. 1.3 km, 26–27.v.2009 ’; 1 3, 3 ƤƤ, same label data, but ‘alt. 1.3 km., 24.v.2009, Ting FENG leg.’; 18 3, 24 ƤƤ, labeled ‘ CHINA: Zhejiang Prov. / Qingliangfeng Mt. / Luminyougu / alt. 0.9 km., 23.vii.2009 / FENG, YUAN & YIN leg.’; 3 3, 4 ƤƤ, same label data, but ‘alt. 850 m, 22.vii.2009 ’.

Description. Male. Reddish brown ( Fig. 2 ), length 2.00–2.09. Head slightly wider than long, HL 0.40–0.45, HW 0.46–0.47, coarsely punctate on frons, disc, and below antennal tubercles, median carina distinct, eyes with about 30 facets; antennae long ( Fig. 7 ). Pronotal about as long as wide, PL 0.47–0.48, PW 0.46–0.47, disc with sparse rough punctures. Elytra slightly wider than long, EL 0.60–0.61, EW 0.77–0.78. Metafemora ( Fig. 28 ) strongly thickened at posterior half, covered with sensory setae. Abdomen wider than long, AL 0.53–0.55, AW 0.72–0.73; tergite IV ( Figs. 12–13 ) larger than V–VII combined, simple in structure, width between discal carinae 0.30. Length of aedeagus ( Figs. 18, 24 ) 0.30.

Female. Similar to male in size, length 1.88–1.98, HL 0.40–0.41, HW 0.41–0.45, PL 0.44–0.47, PW 0.43–0.45, EL 0.53–0.57, EW 0.71–0.72, AL 0.51–0.53, AW 0.68–0.70. Eyes with about 15 facets. Metafemora not thickened, lacking sensory setae. Abdominal tergites simple. Width of female genitalia ( Fig. 31 ) 0.26.

Remarks. This species is most closely allied to B. uenoi from Japan by sharing the modified metafemora and simple abdominal tergites of the male. They may be easily separated by the much shorter antennae, the much more thickened male metafemora, and the forms of the male and female genitalia of the new species.

Distribution. East China (Zhejiang).

Etymology. The species is named after the strongly thickened male femora.

Figures

FIGURES 1 – 2. Habitus of Batriscenellus spp. 1. B. chinensis. 2. B. femoralis. Scales: 0.5 mm.

FIGURES 5 – 9. Left antennae of Batriscenellus spp. 5. B. auritus. 6. B. chinensis. 7. B. femoralis. 8. B. orientalis. 9. B. pulcher. Scales: 0.3 mm.

FIGURES 16 – 28. Aedeagi (16 – 27) and metafemur (28) of Batriscenellus spp. 16 – 21. aedeagus, in lateral view. 22 – 27. same, in ventral view. 16, 22. B. auritus. 17, 23. B. chinensis. 18, 24, 28. B. femoralis. 19, 20, 25, 26. B. orientalis. 21, 27. B. pulcher. Scales: 0.1 mm.

FIGURES 29 – 33. Female genitalia of Batriscenellus spp. 29. B. auritus. 30. B. chinensis. 31. B. femoralis. 32. B. orientalis. 33. B. pulcher. Scales: 0.1 mm.

FIGURES 10 – 15. Abdominal tergites IV – V of Batriscenellus spp. 10 – 11. B. auritus. 12 – 13. B. B. chinensis. 14 – 15. B. pulcher. Scales: 0.2 mm.