Lathrobium shuguangi Peng

Peng, Zhong, Li, Li-Zhen & Zhao, Mei-Jun, 2016, On the Lathrobium fauna of the Luoxiao Mountains, Central China, Zootaxa 4158 (3), pp. 385-402 : 395-396

Lathrobium shuguangi Peng and L.-Z. Li, new species

(Map 1, Figs 5 C, 8)

Type material. HOLOTYPE: Ƌ, labeled ‘ Jiangxi Prov., Pingxiang, Wugong Shan , 27°27'39''N 114°10'03''E, 1340– 1400 m, 19.VII.2013, Song, Yu & Yin leg.’ ( SNUC).

Description. Measurements (in mm) and ratios: BL 8.73, FL 4.28, HL 1.33, HW 1.30, AnL 2.28, PL 1.67, PW 1.30, EL 0.83, AL 1.63, HL/HW 1.02, HW/PW 1.00, HL/PL 0.80, PL/PW 1.28, EL/PL 0.50.

Habitus as in Fig. 5 C. Body dark brown, legs light brown, antennae brown.

Head: punctation moderately fine and moderately dense, somewhat sparser in median dorsal portion; interstices with shallow microsculpture. Eyes moderately small and composed of approximately 60 ommatidia.

Pronotum with weakly convex lateral margins in dorsal view; punctation somewhat sparser than that of head; impunctate midline broad; interstices without microsculpture.

Elytral punctation dense and shallow, defined to ill-defined. Hind wings completely reduced.

Abdomen with fine and rather dense punctation, that of tergite VII sparser than that of anterior tergites; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe.

Male. Posterior margin of tergite VIII weakly convex; sternites III–VI unmodified; sternite VII ( Fig. 8 A) strongly transverse, with dense dark setae in shallow median impression posteriorly, posterior margin broadly concave in the middle, pubescence unmodified, except for few modified short marginal setae near posterior concavity; sternite VIII ( Fig. 8 B) transverse, with deep median impression posteriorly, posterior excision deep and symmetric, margins of this excision with short, blackish setae; aedeagus as in Figs 8 C, D, ventral process long and asymmetric; dorsal plate moderately sclerotized and thin; internal sac with a long sclerotized spine.

Female. Unknown.

Comparative notes. The similar shape and chaetotaxy of the male sternite VIII (posterior excision with dense short and dark setae), the morphology of the aedeagus (asymmetric ventral process; presence of a long sclerotized spine in internal sac; thin dorsal plate) and the external characters (large body; finely punctate head) suggest that L. shuguangi is allied to L. hujiayaoi Peng & Li, 2013 from Maoer Shan, Guangxi. It is distinguished from L. hujiayaoi by the lighter coloration of the body, the shallow median impression of the male sternite VII and the shape of the male sternite VIII. For illustrations of L. hujiayaoi see Peng et al. (2013).

Distribution and natural history. The type locality is situated in the Wugong Shan to the south of Pingxiang, western Jiangxi. The specimen was sifted from leaf litter in mixed forests at an altitude of 1340–1400 m, together with L. taiye .

Etymology. This species is dedicated to Mr. Shu-Guang Peng, the first author’s father, who supported us on our field trips.

Figures

FIGURE 5. Habitus of Lathrobium spp., A — L. jinyuae (Bijia Shan); B — L. jiulingense; C — L. shuguangi. Scale bars: 1.0 mm.

FIGURE 8. Lathrobium shuguangi. A — female tergite VIII; B — female sternite VIII; C — female tergites IX – X. D — male sternite VII; E — male sternite VIII; F — aedeagus in ventral view; G — aedeagus in lateral view. Scale bars: 0.5 mm.