Guimaraesiella caligogularis Gustafsson & Najer & Zou & Bush 2022, sp. nov.
Creators: name: Gustafsson, Daniel R.
name: Najer, Tomas
name: Zou, Fasheng
name: Bush, Sarah E.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Psocodea
Philopteridae
Guimaraesiella
Guimaraesiella caligogularis

description: Guimaraesiella caligogularis sp. nov.
urn:lsid:zoobank.org:act: 70132E02-5ED3-4988-9EBC-7E1DD2F40FEE
Figs 36–42
Diagnosis
Guimaraesiella caligogularis sp. nov. is most similar to Guimaraesiella cinnamomea sp. nov., with which it shares the following characters: dorsal preantennal suture reaches ads (Figs 3, 39); male tergopleurites IV–V without aps, but tergopleurite VI with aps (Figs 1, 36); male tergopleurite VIII with 1 tps on each side (Figs 1, 36); proximal mesosome only slightly constricted distally (Figs 6, 41).
These two species can be separated by the following characters: female abdominal segment IV with 1 ps on each side in Gu. caligogularis sp. nov. (Fig. 37), but without ps in Gu. cinnamomea sp. nov. (Fig. 2); male abdominal segment V with 2 ps on each side in Gu. cinnamomea sp. nov. (Fig. 1), but with 1 ps on each side in Gu. caligogularis sp. nov. (Fig. 36); anterior extension of ventral sclerite broad in Gu. caligogularis sp. nov. (Fig. 41), but narrow in Gu. cinnamomea sp. nov. (Fig. 6); distal mesosome more broadly rounded in Gu. caligogularis sp. nov. (Fig. 41) than in Gu. cinnamomea sp. nov. (Fig. 6).
Etymology
The species name is derived from Latin ‘ caligo ’ for ‘dark’, and ‘ gula ’ for ‘throat’, referring to the dark gular plate.
Material examined
Holotype (ex Pycnonotus plumosus plumosus) MALAYSIA • ♂; [Petaling District], Subang [Jaya]; 1 Mar. 1962; M-00947; NHML.
Non-type material (ex Alophoixus bres tephrogenys [as Criniger bres]) MALAYSIA • 1 ♂, 1 ♀; Terengganu [as Trengganu]; 102º 37′ E, 5º25′ N, 2600 ft a.s.l.; 3 Mar. 1974; Gn. Lawit exped.; Brit. Mus. 1974-2; NHML.
Type host
Pycnonotus plumosus plumosus Blyth, 1845 – olive-winged bulbul.
Other host
Alophoixus bres tephrogenys (Jardine & Selby, 1833) – gray-cheeked bulbul.
Description
Both sexes
Head pentagonal (Fig. 38), lateral margins of preantennal head straight, frons slightly concave. Marginal carina moderate, narrowing anteriorly, median margin slightly irregular. Dorsal anterior plate roughly square-shaped, with shallowly concave anterior margin and slightly convex lateral margins. Ventral anterior plate crescent shaped. Dorsal preantennal suture reaches ads and lateral margins of head. Preantennal nodi extended medianly. Head chaetotaxy as in Fig. 38. Coni with convex margins do not reach distal margin of scapes. Temples rounded. Marginal temporal carina moderate, irregular. Thoracic and abdominal segments as in Figs 36–37. Base pigmentation pale brown with slight reddish tint, except preantennal nodi, gular plate, proepimera, metepisterna, and lateral sections of tergopleurites a medium reddish brown. Reddish tint absent in material from Alophoixus bres tephrogenys, which is also generally paler.
Male
Thoracic and abdominal chaetotaxy as in Fig. 36. Basal apodeme short, slender, widening distally, slightly constricted at mid-length (Fig. 39). Proximal mesosome broad, trapezoidal (Fig. 41), anterior margin slightly concave, lateral margins converging slightly distally. Ventral sclerite broad, anterior end rounded and nearly reaching proximal margin of mesosome. Mesosomal lobes broad, distal end broadly flattened; 3 ames sensilla on each side; 2 pmes microsetae on lateral margins of mesosome. Gonopore crescent shaped, lateral margins slightly rugose. Parameral heads as in Fig. 40. Parameral blades broad, narrowing in distal third; pst1–2 as in Fig. 40. Measurements as in Table 1.
Female
Thoracic and abdominal chaetotaxy as in Fig. 37. Subgenital plate broad distally (Fig. 42), and lateral submarginal extensions almost reach lateral ends of vulval margin. Vulval margin gently rounded (Fig. 42), with 2–3 short, slender vms and 5 short, thorn-like vss on each side; 3–6 short, slender vos on each side of subgenital plate; distal 1 vos median to vss. Measurements as in Table 1.
Remarks
The male specimen from Al. b. tephrogenys is indistinguishable from the male from the type host in all characters except pigmentation patterns; the specimens from Al. b. tephrogenys are paler than the holotype. We consider these specimens to be conspecific.
A female specimen from the type host (NHML) has a distorted head, and different pigmentation patterns compared to the female from the non-type host, and can therefore not with certainty be identified as Gu. caligogularis sp. nov. Illustrations of the female Gu. caligogularis sp. nov. are therefore based on the female from Al. b. tephrogenys.
description: Published as part of 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, pp. 1-88 in European Journal of Taxonomy 800 on pages 25-27, DOI: 10.5852/ejt.2022.800.1683, http://zenodo.org/record/6358666