Guimaraesiella haftorni ( Balat , 1981)

Gustafsson, Daniel R., Oslejskova, Lucie, Najer, Tomas, Sychra, Oldrich & Zou, Fasheng, 2019, Redescriptions of thirteen species of chewing lice in the Brueelia - complex (Phthiraptera, Ischnocera, Philopteridae), with one new synonymy and a neotype designation for Nirmus lais Giebel, 1874, Deutsche Entomologische Zeitschrift 66 (1), pp. 17-39 : 31-33

Guimaraesiella haftorni ( Balat, 1981) Figs 76-77 , 78-82

Allobrueelia haftorni Balát, 1981: 280.

Guimaraesiella haftorni ( Balát, 1981); Gustafsson and Bush 2017: 222.

Type host.

Turdus iliacus Linnaeus, 1758. redwing ( Turdidae ).

Type locality.

Sokolnice, Czechia.

Description.

Both sexes. Head broad, rounded dome-shaped (Fig. 78 ), lateral margins of preantennal head convex, frons broadly concave. Marginal carina broad, with undulating median margin. Dorsal and ventral anterior plates and exact extent of dorsal preantennal suture not clear in examined specimens, and illustrated tentatively. Head chaetotaxy as in Figure 78 . Preantennal nodi bulging. Pre- and postocular nodi of roughly equal size. Marginal temporal carina of moderate width, median margin undulating slightly. Gular plate not visible in examined material, and not illustrat ed. Thoracic and abdominal segments as in Figures 76 and 77 . Pigmentation artificially altered, and true pigmentation patterns unknown.

Male. Thoracic and abdominal chaetotaxy as in Figure 76 . Basal apodeme widening proximally, with slightly concave lateral margins (Fig. 79 ). Proximal mesosome widening slightly proximally (Fig. 80 ). Ventral sclerite rectangular, slender. Mesosomal lobes slender, convergent distally, seemingly not fused in distal end. Mesosomal chaetotaxy as in Figure 80 . Moderate rugose area anterior to reverse drop-shaped gonopore. Parameral heads roughly widely rectangular (Fig. 81 ); parameral blades slender, elongated; pst1-2 not visible in specimens. Measurements (n = 2): TL = 1.25-1.26; HL = 0.37-0.38; HW = 0.39-0.41; PRW = 0.24; PTW = 0.32-0.35; AW = 0.51-0.52.

Female. Thoracic and abdominal chaetotaxy as in Figure 77 . Holotype with 5 mms on one side, and 7 mms on the other; we here illustrated only 5, which is the typical number in Guimaraesiella . Tergopleurite VI without post-spiracular setae in holotype, but this is likely an anomaly as these setae occur in all other Guimaraesiella ; ss on tergopleurite VIII only present on one side. Subgenital plate not clear in specimen, seemingly wide anteriorly (Fig. 82 ); distal shape unknown. Vulval margin gently rounded, somewhat flattened medianly, with 2 short, slender vms and 2 or 3 short, thorn-like vss on each side; 4-6 short, slender vos on each side of subgenital plate; distal 1 vos median to vss. Measurements (n = 1): TL = 1.71; HL = 0.44; HW = 0.47; PRW = 0.28; PTW = 0.42; AW = 0.64.

Type material.

Holotype ♀, Sokolnice, Czechia, 1 Apr. 1958, F. Balát, 1242 (MMBC). Paratypes. 2♂, same collection data as holotype, F. Balát, 1240, 1241 (MMBC).

Remarks.

Balát (1981) explicitly designated the female on slide 1242 as the holotype, and the specimens on slides 1240 and 1241 as paratypes. This is confirmed by the handwritten notes on the slide labels. All specimens are present in the MMBC. Balát (1981) stated that both paratype males were immature. This is incorrect, as both males are adult. However, all three known specimens are poorly cleared, and many details cannot be seen properly, including the meso- and metasterna, metepisterna, proepimera, the gular plate, many leg setae, and the distal section of the subgenital plate of both sexes. More specimens of G. haftorni are needed to completely redescribe and reillustrate this species.

The Guimaraesiella of European thrushes are all morphologically very similar, differing mainly in the male genitalia and the head shape. Moreover, we have seen some specimens of Guimaraesiella from non-type host species in European material (D. Gustafsson unpublished data). Unless these records are the result of contamination or misidentification of the host, this may suggest that at least some European species of Guimaraesiella occur on more than one host species. Relying on host relationships to obtain the species identity of Guimaraesiella samples from thrushes may thus be unreliable. However, almost all species of Guimaraesiella , including those from thrushes, are poorly described, and presently unidentifiable. Redescriptions of Guimaraesiella amsel (Eichler, 1951), Guimaraesiella marginata (Burmeister, 1838), Guimaraesiella turdinulae (Ansari, 1956), and Guimaraesiella viscivori (Denny, 1842) are urgently needed to establish the species limits in this group.

Figures

Figures 76, 77. Guimaraesiella haftorni (Balat, 1958) ex Turdus iliacus Linnaeus, 1758. 76 Male habitus, dorsal and ventral views 77 Female habitus, dorsal and ventral views.

Figures 78 - 82. Guimaraesiella haftorni (Balat, 1958) ex Turdus iliacus Linnaeus, 1758 78 Male head, dorsal and ventral views 79 Male genitalia, dorsal view 80 Male mesosome, ventral view 81 Male paramere, dorsal view 82 Female subgenital plate and vulval margin, ventral view.