Guimaraesiella (Dicrurobates) sexmaculata ( Piaget, 1880 )

Gustafsson, Daniel R. & Bush, Sarah E., 2020, A new subgenus and eight new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae: Brueelia-complex), Zootaxa 4885 (2), pp. 151-188 : 155

Guimaraesiella (Dicrurobates) sexmaculata ( Piaget, 1880)

( Figs 1–7 )

Nirmus sexmaculatus Piaget, 1880: 666 .

Degeeriella sexmaculata ( Piaget, 1880) ; Harrison 1916: 123.

Bruëlia [sic] sexmaculata ( Piaget, 1880) ; Hopkins & Clay 1952: 61.

Brueelia sexmaculata ( Piaget, 1880) ; Price et al. 2003: 158.

Guimaraesiella sexmaculata ( Piaget, 1880) ; Gustafsson & Bush 2017: 222, 352.

Type host. Dicrurus remifer (Temminck, 1823) —lesser racket-tailed drongo.

Other hosts. Dicrurus remifer peracensis (Baker, 1918) —lesser racket-tailed drongo. Dicrurus aeneus aeneus Vieillot, 1817 —bronzed drongo.

Type locality. Unknown.

Description. Both sexes. Head shape and chaetotaxy as in Fig. 3 . Lateral margins of preantennal area slightly convex; frons flattened; temples rounded; marginal carina broad, irregular, narrowing anteriorly; dorsal preantennal suture reaches dsms, ads and lateral margins of head; ventral anterior plate small, semi-circular; coni small; gular plate as in Fig. 3 . Thoracic and abdominal segments as in Figs 1–2 .

Male. Thoracic and abdominal chaetotaxy as in Fig. 1 ; aps absent on tergopleurite IV, but present on tergopleurites V–VII. Genitalia as in Figs 4–6 : basal apodeme slender, rectangular, with rounded anterior end and slight constriction at mid-length ( Fig. 4 ). Ventral sclerite narrow, widening distally, and reaching beyond anterior margin of mesosome; proximal mesosome broadly quadratic, short; mesosomal lobes broad, rounded triangular; rugose area not forming distinct bulging nodi; 2 ames sensilla on each side near antero-lateral corners of mesosomal lobes; 2 pmes sensilla on each side of gonopore near rugose area; gonopore small, with broad marginal thickening ( Fig. 5 ). Parameral heads irregular with broad parameral blades, tapering distally ( Figs 5–6 ). Measurements: Ex Dicrurus remifer peracensis (n = 1): TL = 1.51; HL = 0.41; HW = 0.33; PRW = 0.22; PTW = 0.30; AW = 0.43. Ex Dicrurus aeneus aeneus (n = 1): TL = 1.51; HL = 0.39; HW = 0.32; PRW = 0.21; PTW = 0.30; AW = 0.42.

Female. Thoracic and abdominal chaetotaxy as in Fig. 2 ; psps present on tergopleurite VIII. Subgenital plate as in Fig. 7 , with slight lateral submarginal bulges; vulval margin gently rounded, with 2–3 long slender vms on each side, and 5–6 short, thorn-like vss on each side; 4–6 long, slender vos on each side; distal 2 vos anterior to vms ( Fig. 7 ). Measurements: Ex Dicrurus remifer peracensis (n = 1): TL = 1.98; HL = 0.46; HW = 0.40; PRW = 0.25; PTW = 0.36; AW = 0.54. Ex Dicrurus aeneus aeneus (n = 2): TL = 1.76–1.79; HL = 0.42; HW = 0.35; PRW = 0.22; PTW = 0.33; AW = 0.51–0.52.

Type material. Ex Dicrurus remifer : Syntypes: 2♂, 3♀, Piaget Collection, 1395–1396 ( NHML) [one slide in this series contains a different species of Guimaraesiella ].

Non-type material. Ex Dicrurus aeneus aeneus : 1♂, 2♀, Myanmar, R . Meinertzhagen , 13523 ( NHML) .

Ex D. remifer peracensis : 1♂, Khao Soi Dao Tai, elev. 4800 ft, Chanthaburi Province, Thailand, 7 Mar. 1966, MAPS-4208 ( NHML); 1♀ , Khao Soi Dao Tai , elev. 2500 ft, Chanthaburi Province, Thailand, 21 Mar. 1968, MAPS-4609 ( NHML) .

Figures

FIGURES 1–2. Guimaraesiella (Dicrurobates) sexmaculata (Piaget, 1880). 1, male habitus, dorsal and ventral views. 2, female habitus, dorsal and ventral views. Abbreviations: aps = accessory post-spiracular seta; mms = marginal mesometanotal setae; ps = paratergal seta; psps = principal post-spiracular seta; ss = sutural seta.

FIGURES 3–7. Guimaraesiella (Dicrurobates) sexmaculata (Piaget, 1880). 3, male head, dorsal and ventral views. 4, male genitalia, dorsal view. 5, male mesosome, ventral view. 6, male paramere, dorsal view. 7, female subgenital plate and vulval margin, ventral view.Abbreviations: ads = anterior dorsal seta; ames = anterior mesosomal setae; dsms = dorsal submarginal seta; mts3 = marginal temporal seta 3; pmes = posterior mesosomal setae; pns = post-nodal seta; pst1–2 = parameral setae 1–2; s4 = sensillus 4; vms = vulval marginal setae; vos = vulval oblique setae; vss = vulval submarginal setae.