Batriscenellus fanxingqiui Jiang and Yin, 2017

Yin, Zi-Wei, 2017, Eight new species and two new records of Batriscenellus Jeannel (Coleoptera: Staphylinidae: Pselaphinae) from China and India, Zootaxa 4318 (3), pp. 561-575 : 566-568

Batriscenellus fanxingqiui Jiang and Yin , new species

( Figs 3 B, 4B, 4E, 4H–I)

Type material (15 exs). Holotype: ♂: ‘ China: Fujian, Nanping City , near the main entrance of Fujian Forestry Vocational Technical College (ĀAEẆẅDẅŔỀỲK), 26°35'13"N, 118°15'11"E, ca. 90 m (light trap), 09– 10.iv.2016, Fan Xingqiu leg.’ ( SNUC) . Paratypes: 14 ♂♂, same collection data as the holotype (SNUC).

Diagnosis of male. Dorsal surface of head, pronotum, and tergite IV finely punctate; antennomeres elongate; elytra with shallow sutural and discal striae; all legs simple; tergite IV modified, with small median cavity at posterior portion; aedeagus with thin ventral lobe, and broad, bifurcate dorsal lobe.

Description. Male ( Fig. 3 B). Body reddish-brown, length 1.83–1.92 mm. Head subrectangular, slightly wider than long, HL 0.39–0.41 mm, HW 0.43–0.44 mm, dorsal surface finely punctate ( Fig. 4 B); vertex with thin median ridge, lacking sulcus connecting foveae; antennomeres elongate, clubs formed by apical three antennomeres; each eye composed of about 30 facets. Pronotum as long as wide, PL 0.41–0.43 mm, PW 0.41–0.44 mm, finely punctate ( Fig. 4 B). Elytra wider than long, EL 0.62–0.64 mm, EW 0.72–0.73 mm, narrowed at base, discal striae nearly straight, extending to near elytral apex; sutural striae complete. All legs simple, lacking modification. Abdomen wider than long, AL 0.41–0.44 mm, AW 0.63–0.65 mm, finely punctate and with short setae; tergite IV ( Fig. 4 E) with small cavity at posterior portion, with small nodules at and densely setose along anterior margin of cavity, with lateral setose patches. Aedeagus ( Fig. 4 H–I) strongly asymmetric, length 0.31 mm, thin ventral lobe located at right side, dorsal lobe broad at base, apically bifurcate.

Female. Unknown.

Comparative Notes. Batriscenellus fanxingqiui is placed as a member of the B. auritus species group (see Yin et al. 2011) based on the modified male abdominal tergite IV. The new species is most similar to B. abdominalis Yin & Wang (in Wang et al. 2015) by the posteriorly located cavity on male tergite IV. These two species can be readily separated by the finely punctate head and pronotum in B. fanxingqiui , while the head and pronotum in B. abdominalis are coarsely punctate. They can be further separated by the different form of the cavity on male tergite IV, and form of the aedeagus.

Distribution. China: Fujian.

Etymology. The new specific epithet is dedicated to Xing-Qiu Fan, who collected the type series.

Figures

FIGURE 3. Male habitus of Batriscenellus cuccodoroi (A), and B. fanxingqiui (B). Scale bars: 0.5 mm.

FIGURE 4. Diagnostic features of male Batriscenellus (A, C – D, F – G. B. cuccodoroi; B, E, H – I. B. fanxingqiui). A – B. Head dorsum and pronotum. C – E. Abdominal tergites IV – VII in lateral (C) and dorsal (D – E) views. F – I. Aedeagus, in lateral (F, H) and ventral (G, I) views. Scale bars: 0.2 mm in A – E; 0.1 mm in F – I.