Resartor elugeus, Gustafsson & Tian & Zou, 2021

Gustafsson, Daniel R., Tian, Chunpo & Zou, Fasheng, 2021, New species of ischnoceran chewing lice (Phthiraptera: Philopteridae) from Chinese birds, Zootaxa 4990 (2), pp. 305-328 : 321-324

Resartor elugeus new species

( Figs 24–32 )

Type host: Alcippe fratercula yunnanensis Harington, 1913 — Yunnan fulvetta.

Type locality: Ailaoshan , Jingdong County, Yunnan Province, China .

Diagnosis. Resartor elugeus new species keys to couplet 13 in the key of Gustafsson et al. (2018), close to Resartor longisuturalis Gustafsson et al., 2018 and Resartor aterrimus Gustafsson et al., 2018 . However, Resartor elugeus can be separated from these two species by the following characters: male tergopleurite VII without tps in R. elugeus ( Fig. 24 ) but with tps in the other two species; male tergopleurite IV with psps in R. elugeus ( Fig. 24 ) but without psps in the other two species; all three species differ in the shape of the proximal mesosome and the mesosomal lobes ( Figs 29, 31 ).

Resartor elugeus can be further separated from R. longisuturalis by the following characters: female tergopleurite IV with psps in R. elugeus ( Fig. 25 ), but without psps in R. longisuturalis ; mesosomal lobes with one rugose nodus on each side in R. elugeus ( Fig. 31 ) but with two distinct nodi on each side in R. longisuturalis .

Description. Both sexes. Head trapezoidal, frons broadly flattened, lateral margins of preantennal head slightly convex ( Fig. 26 ). Dorsal preantennal suture reaches ads and dsms but not lateral margins of head. Marginal carina narrows anteriorly, with irregular median margin; preantennal nodi bulging. Thickening of dorsal anterior plate typical for genus. Head chaetotaxy as in Fig. 26 . Marginal temporal carina with irregular median margin, but rather uniform in width except at mts3 and near occiput. Thoracic and abdominal segments and chaetotaxy as in Figs 24–25 . Measurements as in Table 1 .

Male. Antennae distorted and placed underneath the head on both sides in single examined male, and not illustrated; from what can be seen, male antennae are similar to female antennae ( Figs 27–28 ). Tergopleurite IV with psps ( Fig. 24 ); tergopleurite VII without tps. Basal apodeme widening distally, proximal section not visible ( Fig. 29 ). Proximal mesosome expanded into transversal rectangle ( Fig. 31 ). Mesosomal lobes with sharply pointed anterior end, lateral margins convergent distally, with single rugose nodi visible at postero-lateral corner and two pmes microsetae on lateral margin on each side. Ventral section with broad antero-lateral extensions and rounded posterior margin. Parameres with slender heads ( Fig. 30 ), widening distally; pst1–2 as in Fig. 30 .

Female. Antennae as in Figs 27–28 . Tergopleurite IV with psps ( Fig. 25 ). Subgenital plate roughly rectangular, with lateral margins barely or not concave ( Fig. 32 ); connection to cross-piece of moderate width. Vulval margin gently rounded with 3–4 short, slender vms and 6–9 short, thorn-like vss on each side; 3–4 long, slender vos on each side of subgenital plate; distal vos near vss.

Etymology: The species epithet is derived from “ elugeo ”, Latin for “I mourn”. This is in reference to the name of the type locality, Ailaoshan, which means “Mourning Prisoner Mountain”, as well as the dark lateral margins of the abdomen of this species.

Type material. Ex Alcippe fratercula yunnanensis : Holotype ♂, Ailaoshan Nature Reserve , Jingdong County, Yunnan Province, China, 23 Aug. 2018, D. R . Gustafsson & L. Lei, bird J3689, GD-PHTH-00364 ( IZGAS). Paratypes: 1♀, same data as holotype, GD-PHTH-00365 ( IZGAS). 1♀, same data as holotype, except 4 Sep. 2018, bird J3751, GD-PHTH-00366 ( IZGAS). 4♀, same data as holotype except 6 Sep. 2018, bird J3763, GD-PHTH- 00367–370 ( IZGAS) .

Figures

FIGURES 24–25. Resartor elugeus new species. 24, male habitus, dorsal and ventral views. 25, female habitus, dorsal and ventral views. Abbreviations: psps = principal postspiracular seta; tps = tergal posterior seta.

FIGURES 26–32. Resartor elugeus new species. 26, male head, dorsal and ventral view. 27, female left antennae, dorsal view. 28, female right antenna, ventral view. 29, male genitalia, dorsal view. 30, male paramere, dorsal view. 31, male mesosome, ventral view. 32, female subgenital plate and vulval margin, ventral view. Abbreviations: ads = anterior dorsal seta; dsms = dorsal submarginal seta; mts3 = marginal temporal seta 3; pmes = posterior mesosomal seta; pst1–2 = parameral setae 1–2; vms = vulval marginal seta; vos = vulval oblique seta; vss = vulval submarginal seta.