Guimaraesiella brunneomarginata, 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 : 13-16

Guimaraesiella brunneomarginata sp. nov.

urn:lsid:zoobank.org:act:B13C707A-E735-4D58-846C-4A36DA8FE950

Figs 8–14

Diagnosis

Guimaraesiella brunneomarginata sp. nov. is most similar to Guimaraesiella cucphuongensis (Najer & Sychra in Najer et al., 2012), with which it shares the following characters: aps absent on male tergopleurite IV, but present on male tergopleurite V ( Fig. 8 ); female abdominal segment IV with 1 ps on each side ( Fig. 9 ); female abdominal segment V with 2 ps on each side ( Fig. 9 ).

These two species can be separated by the following characters: male tergopleurite VIII with 1 tps on each side in Gu. cucphuongensis , but with 2 tps on each side in Gu. brunneomarginata sp. nov. ( Fig. 8 ); male abdominal segment IV with 2 ps on each side in Gu. cucphuongensis , but with only 1 ps on each side in Gu. brunneomarginata sp. nov. ( Fig. 8 ); female vulval margin with at least 12 thorn-like vss in total in Gu. brunneomarginata sp. nov. ( Fig. 14 ), but with at most 11 thorn-like vss in total in Gu. cucphuongensis .

Etymology

The species name is derived from the Latin ‘ brunneus ’ for ‘brown’ and ‘ margo ’ for ‘edge’, referring to the pigmentation patterns of the abdomen.

Material examined

Holotype (ex Pycnonotus goiavier samarensis) PHILIPPINES • ♂; Leyte Island , Mount Lobi Range, Tambis Burauen ; 3 Jun. 1964; D.S. Rabor leg.; B-106; BPBM.

Paratypes PHILIPPINES • 2 ♂♂, 6 ♀♀, same collection data as for holotype; BPBM • 2 ♂♂, same locality and collector as for holotype; 7 May 1964; B-410; BPBM • 1 ♂, 4 ♀♀; same locality and collector as for holotype; 4 May 1964; B-171; BPBM • 1 ♂; same locality and collector as for holotype; 6 May 1964; B-318; BPBM .

Non-type material (ex Pycnonotus goiavier personatus) MALAYSIA • 1 ♂, 4 ♀♀; [Kelantan?], R[antau?] Panjang; 6 Apr. 1962; M-01275; UMSP .

Type host

Pycnonotus goiavier samarensis Rand & Rabor, 1960 – yellow-vented bulbul.

Other host

Pycnonotus goiavier personatus Hume, 1873.

Description

Both sexes

Head irregularly pentagonal ( Fig. 10 ), lateral margins of preantennal head clearly convex proximally, but concave in anterior third, frons shallowly concave. Marginal carina broad, narrowing only near anterior end, median margin shallowly irregular. Dorsal anterior plate with shallowly concave anterior margin and convex lateral margins. Ventral anterior plate crescent shaped. Dorsal preantennal suture reaches lateral margins of head, dsms and ads, and in some specimens extend medianly to ads. Preantennal nodi extended medianly. Head chaetotaxy as in Fig. 10 . Coni sharp, reaching to or slightly beyond distal margin of scape. Temples rounded. Temporal marginal carina narrow, widening anteriorly. Thoracic and abdominal segments as in Figs 8–9 . Pigmentation differs between material from the two host subspecies. Material from Pycnonotus goiavier samarensis: base pigmentation of head pale brown, base pigmentation of thorax and abdomen translucent; head nodi, marginal and marginal temporal carinae, gular plate, proepimera, metepisterna, and lateral sections of tergopleurites dark brown. Material from Py. g. personatus: base pigmentation of all body pale yellow brown, not darker on head; head nodi, marginal and temporal marginal carinae, gular plate, proepimera, and metepisterna medium-brown; sternal and subgenital plates pale brown, darker in female than in male; lateral sections of tergopleurites dark brown.

Male

Thoracic and abdominal chaetotaxy as in Fig. 8 . Basal apodeme rectangular with rounded anterior end, widening anteriorly ( Fig. 11 ), not or only slightly constricted at mid-length. Proximal mesosome broad ( Fig. 13 ), roughly trapezoidal, with slightly concave anterior margin and convex lateral margins, constricted in distal end. Ventral sclerite short, not thickened anteriorly, and not approaching anterior margin of proximal mesosome. Mesosomal lobes broad, gently rounded; 3 ames sensilla on each side; 2 pmes microsetae on lateral margins of mesosome. Gonopore broad, distal margin deeply concave. Parameral heads as in Fig. 12 . Parameral blades slender, extended slightly in distal end; pst1–2 as in Fig. 12 . Measurements as in Table 1 .

Female

Thoracic and abdominal chaetotaxy as in Fig. 9 . Subgenital plate with wide lateral submarginal extensions ( Fig. 14 ), lateral ends of these extensions bent posteriorly. Vulval margin gently rounded with straight central part, with 3–4 short, slender vms and 6–8 short, thorn-like vss one each side; 4–7 short, slender vos on each side of subgenital plate; distal 1–2 vos median to vss. Measurements as in Table 1 .

Remarks

Material from the two host subspecies differs in pigmentation patterns (see above). The male from Pycnonotus goiavier personatus has a shorter head than males from Py. g. samarensis, but the male genitalia are indistinguishable between material from the two host subspecies. We here treat all material as conspecific.

Figures

Figs 8–9. Guimaraesiella brunneomarginata sp. nov. 8. Male habitus, dorsal and ventral views. 9. Female habitus, dorsal and ventral views.

Figs 10–14. Guimaraesiella brunneomarginata sp. nov. 10. Male head, dorsal and ventral views. 11. Male genitalia, dorsal view. 12. Male paramere, dorsal view. 13. Male mesosome, ventral view. 14. Female subgenital plate and vulval margin, ventral view.