Sinolipeurus sichuanensis, Gustafsson & Lei & Chu & Zou, 2020

Gustafsson, Daniel R., Lei, Lujia, Chu, Xingzhi & Zou, Fasheng, 2020, Review of Chinese species of the Oxylipeurus - complex (Phthiraptera: Philopteridae), with descriptions of two new genera and five new species, Zootaxa 4742 (2), pp. 201-255 : 232

Sinolipeurus sichuanensis new species

( Figs 18 , 20 , 32 , 66–68 , 87 , 91 )

Type locality. Szechwan [= Sichuan, China].

Diagnosis. Sinolipeurus sichuanensis n. sp. can be separated from S. tetraophasis by the following characters: (1) head smaller and proportionately more slender in S. sichuanensis ( Fig. 20 ) than in S. tetraophasis ( Fig. 19 ); (2) proximal mesosome small and with distally slightly diverging lateral margins in S. sichuanensis ( Fig. 68 ), but larger and with distally converging lateral margins in S. tetraophasis ( Fig. 65 ); (3) antero-lateral hooks of mesosome more pronounced in S. tetraophasis ( Fig. 65 ) than in S. sichuanensis ( Fig. 68 ); (4) gonopores with different shape ( Figs 65, 68 ); (5) parameres with different shapes ( Figs 64, 67 ).

Description.

Male. Head broad, frons broadly rounded ( Fig. 20 ). Marginal carina slender. Head chaetotaxy as in Fig. 20 . Lateral margins of postantennal head converging posteriorly. Thoracic and abdominal plates and chaetotaxy as in Fig. 20 . Reticulation only visible on pterosternal plate, metepisterna, and sternal and subgenital plates. Antennae as in Fig. 32 ; tooth-like projection of scape prominent; rugose area of flagellomere I not visible. Accessory sternal plate present ( Fig. 87 ). Stylus long, slender, spatulate, distal end with sinusoid margins ( Fig. 87 ). Basal apodeme broad, proximal end diffuse ( Fig. 66 ). Proximal mesosome small, square-shaped, lateral margins diverging distally ( Fig. 68 ); distal mesosome with slight submedian lobes, densely rugose; antero-lateral and lateral lobes as in Fig. 68 . Gonopore and ventral sclerite as in Fig. 68 . Parameres as in Fig. 67 ; pst2 sensillus. Measurements as in Table 1 .

Female. Unknown.

Etymology. The specific epithet is derived from the type locality, Sichuan Province, China.

Type material. Holotype ♂, Szechwan [= Sichuan Province, China], Apr. 1908, R. Meinertzhagen, 3756, NHMUK0106827630 ( NHML).

Remarks. The slide containing the holotype of Sinolipeurus sichuanensis also has a female. This specimen differs from the male in the shape and structure of the head and the shape of the pleural incrassations; therefore, we do not regard it as conspecific with the male holotype. That female is similar, but not identical, to females of Reticulipeurus ithaginis we have examined. Thus, we believe the female on slide NHMUK0106827630 may represent an undescribed species of Reticulipeurus from Tragopan temminckii or from an unknown host.

The holotype of Sinolipeurus sichuanensis has asymmetrical sternal plates V–VII. Plates V–VI are fused on one side but separate on the other side, and plate VII is reduced anteriorly on one side ( Figs 18 , 20 ). No sts are present on the fused side of sternal plates V–VI, but two setae are present on the non-fused side. We regard these asymmetries to be teratologies in the single male of S. sichuanensis examined.

Figures

FIGURE 91. Sinolipeurus sichuanensis new species ex Tragopan temminckii. Chaetotaxy of male legs, dorsal and ventral views.

FIGURES 17–18. Megalipeurus sinensis new species ex Arborophila gingica. 17, male habitus, dorsal and ventral views (legs have been rotated for clarity). 18, ventral view of sternal plates V–VII from single examined male of Sinolipeurus sichuanensis new species. Reticulation of plates not illustrated. Roman numerals denote segment number. Abbreviations: asmns = anterior submarginal meso-metanotal seta; pdas = pronotal dorsal anterior seta; pmls = pronotal marginal-lateral seta; ppss = pronotal post-spiracular seta; psmns = posterior submarginal meso-metanotal seta; pths = pterothoracic trichoid seta; ptrs = pterothoracic thorn-like seta.

FIGURES 19–20. Male habitus, dorsal and ventral views. 19, Sinolipeurus tetraophasis (Clay, 1938) ex Tetraophasis obscurus. 20, Sinolipeurus sichuanensis new species ex Tragopan temminckii. Legs have been rotated for clarity.

FIGURES 29–32. Male antennae. 29, Reticulipeurus ithaginis (Clay, 1938) ex Ithaginis cruentus. 30, Megalipeurus sinensis new species ex Arborophila gingica. 31, Sinolipeurus tetraophasis (Clay, 1938) ex Tetraophasis obscurus. 32, Sinolipeurus sichuanensis new species ex Tragopan temminckii. All figures drawn to same scale.

FIGURES 57–68. Male genitalia. 57–59, Reticulipeurus ithaginis (Clay, 1938) ex Ithaginis cruentus. 57, full genitalia, dorsal view. 58, paramere, dorsal view. 59, mesosome, ventral view. 60–62, Megalipeurus sinensis new species ex Arborophila gingica. 60, genitalia, dorsal view. 61, paramere, dorsal view. 62, mesosome, ventral view (the V-shaped sclerite is internal, but here is drawn with complete lines to illustrate shape and structure). 63–65, Sinolipeurus tetraophasis (Clay, 1938) ex Tetraophasis obscurus. 63, genitalia, dorsal view. 64, paramere, dorsal view. 65, mesosome, ventral view. 66–68, Sinolipeurus sichuanensis new species ex Tragopan temminckii. 66, genitalia, dorsal view. 67, paramere, dorsal view. 68, mesosome, ventral view. All figures drawn to same scale. Abbreviations: pst1–2 = parameral setae 1–2.

FIGURES 85–87. Male terminalia, ventral views. 85, Megalipeurus sinensis new species ex Arborophila gingica. 86, Sinolipeurus tetraophasis (Clay, 1938) ex Tetraophasis obscurus. 87, Sinolipeurus sichuanensis new species ex Tragopan temminckii.