Malostenopsocus lacteus, Liang, Feiyang, Li, Fasheng & Liu, Xingyue, 2017

Liang, Feiyang, Li, Fasheng & Liu, Xingyue, 2017, The bark louse family Stenopsocidae (Psocodea: Psocomorpha) newly recorded from Laos, with description of three new species, Zootaxa 4243 (3), pp. 589-599 : 590-592

publication ID	https://doi.org/ 10.11646/zootaxa.4243.3.10
publication LSID	lsid:zoobank.org:pub:40AECC76-0920-4E65-A3E5-2D3A115EFCDA
DOI	https://doi.org/10.5281/zenodo.6039792
persistent identifier	https://treatment.plazi.org/id/DC14950C-A716-3F48-3C9C-D2F048C18B47
treatment provided by	Plazi
scientific name	Malostenopsocus lacteus
status	sp. nov.

Treatment

Malostenopsocus lacteus View in CoL sp. nov.

( Figs. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Diagnosis. This species is characterized by the light-colored body and the indistinctly sclerotized female subgenital plate.

Female. Measurements. Body length 3.27 mm, length from postclypeus to wing tip 5.91 mm. IO: 0.56 mm, d: 0.19 mm, IO/d = 2.95, f1: 0.66 mm, f2: 0.63 mm, f3: 0.57 mm, FWL: 4.67 mm, FWW: 1.73 mm, HWL: 3.04 mm, HWW: 1.03 mm, t1: 0.47 mm, t2: 0.12 mm.

Coloration (in alcohol). Head ( Figs. 1 View FIGURE 1 b–d) whitish, middle of vertex brown, ecdysial line brown, ocellar area dark brown, middle of front with a brown marking. Antennal scape yellowish white, pedicel and flagellum brown. Mouthpart yellowish white, but labrum yellowish brown and tip of maxillary palpi brown. Prothorax yellowish white, meso- and metathorax dorsally brown, laterally mostly yellowish white. Legs with yellowish white coxae and trochanters, femora and tarsomere 1 mostly yellowish white with brown apex, tibiae and tarsomere 2 brown. Forewing ( Fig. 1 View FIGURE 1 e) transparent and immaculate, wing margin mostly pale brown; costal vein from base to pterostigma and R yellowish white, M+CuA and A pale brown, other veins brown; basal membranous region with setae ( Fig. 2 View FIGURE 2 ). Hind wing ( Fig. 1 View FIGURE 1 f) transparent; costal vein and R yellowish white; other part of wing margin, M+CuA, and A yellowish brown; other veins brown. Abdomen yellowish white.

Genitalia ( Fig. 3 View FIGURE 3 a) feebly sclerotized. Epiproct ( Fig. 3 View FIGURE 3 b) subtrapezoid. Paraproct with 28 trichobothrias. Subgenital plate ( Fig. 3 View FIGURE 3 c) without distinctly sclerotized region. Gonapophyses ( Fig. 3 View FIGURE 3 d) slightly sclerotized, external valve subtrapezoid, dorsal and ventral valve blade-shaped.

Male. Unknown.

Type material. Holotype female, Laos: Oudomxai, near Muang Xai , 880 m, 24.III.2016, Xingyue Liu ( CAU).

Distribution. Laos (Oudomxai).

Etymology. The specific name “ lacteus ” refers to the type female with light-colored body.

Remarks. This new species differs from all other species of Malostenopsocus by the yellowish white costal vein and the indistinctly sclerotized region of the female subgenital plate. It is the first record of the genus Malostenopsocus from Indochina Peninsula. Another record of this genus from Southeast Asia is from Malaysia ( Yoshizawa et al. 2014).