Philopteroides holosternus, 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 : 62-66

Philopteroides holosternus sp. nov.

urn:lsid:zoobank.org:act:4ACFDCEE-4214-4FAB-AF53-0EAD86F9C20D

Figs 112–117

Diagnosis

Philopteroides holosternus sp. nov. does not appear particularly close to any other species of Philopteroides known from bulbuls. It can be separated from all other species in the genus known from bulbuls by the following characters: male sternal plates III–VI entire, with no lateral accessory sternal plates present ( Fig. 112 ); dorsal sclerite of mesosome with elongated, bifid proximal end ( Fig. 115 ); distal basal apodeme with central ridge that appears to lie dorsal to dorsal sclerite and bear one sensillum on each side ( Fig. 115 ); gonoporal complex unique among species known from bulbuls ( Fig. 116 ).

Etymology

The species name is derived from the Greek words ‘ holos ’ for ‘whole’, and ‘ sternon ’ for ‘chest’, referring to the broad sternal plates and uninterrupted sternal plate of male abdominal segment III.

Material examined

Holotype (ex Pycnonotus goiavier goiavier) PHILIPPINES • ♂; Negros Oriental, Siaton ; 6 Feb. 1965; H.E. McClure leg.; SE-1760, 23710 on reverse; BPBM.

Paratypes PHILIPPINES • 1 ♀; same locality, collector and host as for holotype; SE-1755, 23709 on reverse; BPBM • 1 ♀; Negros [Oriental], Siaton, Maloh; 2 Mar. 1965; H.E. McClure leg.; MAPS-5E2081 , 23711 on reverse; BPBM .

Type host

Pycnonotus goiavier goiavier (Scopoli, 1786) – yellow-vented bulbul.

Description

Both sexes

Head shape as in Fig. 114 , lateral margins of preantennal area shallowly concave, frons deeply concave, with central sclerotization medianly continuous. Dorsal anterior plate as in Fig. 114 . Ventral anterior plate rounded triangular, anterior margin concave. Lobes of ventral carina trapezoidal, widening medianly. Head chaetotaxy as in Fig. 114 . Thoracic and abdominal segments as in Figs 112–113 ; sternal plates broad. Pigmentation differs between sexes, with female much darker than male. Tergopleurites III–VIII with translucent fenestrae around spiracular openings.

Male

Thoracic and abdominal chaetotaxy as in Fig. 112 . Metanotum with 8–9 setae on each side. Base pigmentation light brown, except posterior elongation of dorsal anterior plate, temporal carinae, and proepimera medium brown. Sternal plate II medianly continuous; sternal plates III–VI broad, long, not divided into central and accessory plates. Subgenital plate large, with small irregular accessory plate on segment IX+X. Basal apodeme broad ( Fig. 115 ), narrowing markedly in anterior end, with slightly convex anterior margin. Distal end of basal apodeme with arched, medianly convergent dorsal ridges ( Fig. 115 ). Dorsal thickening of mesosome with bifid anterior extension. Gonopore wide, crescent shaped, distally with wide, blunt nodes ( Fig. 116 ); 1 sensillum on each lobe. Parameres simple ( Fig. 116 ), 2 sensilla on lateral margin of basal paramere, and 2 sensilla on lateral margin in distal half of each paramere. Measurements as in Tables 1–2 .

Female

Thoracic and abdominal chaetotaxy as in Fig. 113 . Metanotum with 7–9 setae on each side. Base pigmentation pale brown, except marginal carina, dorsal anterior plate, preantennal nodi, temporal and temporal marginal carinae, proepimera, prosternal plate, lateral and posterior sections of metanotum, and lateral sections of tergopleurites medium brown. Sternal plate II short but wide ( Fig. 113 ), medianly continuous, and with small lateral accessory plate on each side; sternal plates III–VI wide, with small lateral accessory plates on each side. Subgenital plate as in Fig. 117 . Surface between subgenital plate and vulval margin with faint reticulation. Vulval margin more or less straight ( Fig. 117 ), with 4–5 long and 4–5 short setae on each side. Subvulval plates broad, distal end widely pointed. Measurements as in Tables 1–2 .

Figures

Figs 112–113. Philopteroides holosternus sp. nov. 112. Male habitus, dorsal and ventral views. 113. Female habitus, dorsal and ventral views.

Figs 114–117. Philopteroides holosternus sp. nov. 114. Male head, dorsal and ventral views. 115. Male genitalia, dorsal view. 116. Male genitalia, ventral view. 117. Female subgenital plate and vulval margin, ventral view.