Guimaraesiella ixi, Gustafsson & Najer & Zou & Bush, 2022

Gustafsson, Daniel R., Najer, Tomas, Zou, Fasheng & Bush, Sarah E., 2022, The ischnoceran chewing lice (Phthiraptera: Ischnocera) of bulbuls (Aves: Passeriformes: Pycnonotidae), with descriptions of 18 new species, European Journal of Taxonomy 800, pp. 1-88 : 22-24

Guimaraesiella ixi sp. nov.

urn:lsid:zoobank.org:act:7ED99A0B-945C-42B5-9A9D-7431C5BF1A1D

Figs 29–35

Diagnosis

Guimaraesiella ixi sp. nov. is not particularly similar to any other species of Guimaraesiella known from bulbuls, and can be separated from all other species by the following combination of characters: male tergopleurites IV–V without tps ( Fig. 29 ); proximal mesosome narrow distally ( Fig. 34 ); gonopore slenderly crescent shaped ( Fig. 34 ); dorsal preantennal suture reaching ads and lateral margin of head ( Fig. 31 ); male tergopleurite VI without aps ( Fig. 29 ); abdominal segment IV with 2 ps on each side in both sexes ( Fig. 29 ); proximal mesosome slender ( Fig. 34 ); ventral sclerite of mesosome with anterior thickening ( Fig. 27 ).

Etymology

The species name is derived from the generic name of the type host.

Material examined

Holotype (ex Ixos mcclellandii peracensis [as Hypsipetes mcclellandii or Microscelis mcclellandii]) MALAYSIA • ♂; Mount Brinchang ; 17 Mar. 1963; M-02631; NHML .

Paratypes MALAYSIA • 1 ♀; same collection data as for holotype; NHML • 1 ♂; same locality as for holotype; 11 Dec. 1962; M-00685 ; NHML • 1 ♀; same locality and date as for holotype; M-00683 ; NHML .

Type host

Ixos mcclellandii peracensis (Hartert & Butler, 1898) – mountain bulbul.

Description

Both sexes

Head pentagonal( Fig.31 ), lateral margins of preantennal head more or less straight, frons slightly concave. Marginal carina slender, gradually narrowing anteriorly, median margin only slightly undulating. Dorsal anterior plate narrowing posteriorly, with shallowly concave anterior margin and convex lateral margins. Ventral anterior plate short, bowl-shaped with slightly concave anterior margin. Dorsal preantennal suture reaches ads and lateral margins of head. Preantennal nodi extended medianly. Head chaetotaxy as in Fig. 31 . Coni reach beyond distal margin of scapes. Lateral margins of postantennal head slightly convex. Temples sharply rounded. Temporal marginal carina slender, only slightly irregular. Thoracic and abdominal segments as in Figs 29–30 . Base pigmentation very faint, most of body translucent, except preantennal and preocular nodi, gular plate, proepimera, metepisterna and lateral sections of tergopleurites pale brown.

Male

Thoracic and abdominal chaetotaxy as in Fig. 29 . Basal apodeme short, constricted distally from mid-length ( Fig. 32 ). Proximal mesosome trapezoidal ( Fig. 34 ). Ventral sclerite slender, anterior end rounded, not thickened, not reaching anterior margin of proximal mesosome. Mesosomal lobes rounded triangular; 3 ames sensilla on each side, distal seta on each side apparently longer than two proximal setae; 2 pmes microsetae on lateral margins of mesosome. Gonopore deeply crescent shaped. Parameral heads as in Fig. 33 . Parameral blades stout, in shape of hunting knife, narrowing only distally; pst1–2 as in Fig. 33 . Measurements as in Table 1 .

Female Thoracic and abdominal chaetotaxy as in Fig. 30 . Subgenital plate broad in distal end ( Fig. 35 ), with blunt and broad lateral submarginal extensions. Vulval margin curved, with 3–4 short, slender vms and 5–7 short, thorn-like vss on each side; 5–6 short, slender vos on each side of subgenital plate; distal 1–2 vos median to vss. Measurements as in Table 1 .

Figures

Figs 29–30. Guimaraesiella ixi sp. nov. 29. Male habitus, dorsal and ventral views. 30. Female habitus, dorsal and ventral views.

Figs 31–35. Guimaraesiella ixi sp. nov. 31. Male head, dorsal and ventral views. 32. Male genitalia, dorsal view. 33. Male paramere, dorsal view. 34. Male mesosome, ventral view. 35. Female subgenital plate and vulval margin, ventral view.

Figs 24–28. Guimaraesiella lorica sp. nov. 24. Male head, dorsal and ventral views. 25. Male genitalia, dorsal view. 26. Male paramere, dorsal view. 27. Male mesosome, ventral view. 28. Female subgenital plate and vulval margin, ventral view.