Morphological revision of the hyperdiverse Brueelia - complex (Insecta: Phthiraptera: Ischnocera: Philopteridae) with new taxa, checklists and generic key
Bush, Sarah E.
Zootaxa
2017
2017-08-31
4313
1
1
443
Gustafsson & Bush
Bush
2017
[151,662,1736,1762]
Insecta
Philopteridae
Titanomessor
Animalia
Phthiraptera
133
134
Arthropoda
species
sexloba
sp. nov.
Typehost. Laniarius erythrogaster(Cretzschmar, 1829)— black-headed gonolek. Typelocality. Uganda.
Diagnosis. Titanomessor sexloba n. sp.is separated from all other known species of the Brueelia-complex by the shape and structure of the male parameres ( Fig. 215), the transversally continuous dorsal preantennal suture that does not reach the margin of the head ( Fig. 212), and the sexually dimorphic mts(see below).
Description. Both sexes. Head shape, structure, and chaetotaxy as in genus description and Fig. 212. Dorsal preantennal suture irregular, often with diffuse margins, but does not seem to reach either adsor dsms. We have examined both male and female specimens in which the mtschaetotaxy is different from that given in the genus description. Specifically, in some female specimens mts5is as long as mts3–4, and in some male specimens either mts4or mts5are spine-like, but these specimens are aberrant only on one side of the head. Head largely pale, except median margin of marginal carina, parts of mandibular framework, preocular nodi, occipital carinae, and gular plate with medium-brown pigmentation. Pedicel and flagellomeres I–II with light brown pigmentation. Thoracic and abdominal segments as in genus description and Figs 210–211. Thorax with only proepimera and metepisterna with brown pigmentation, otherwise translucent. Tergopleurites translucent. Sternal plates, pleurites, and subgenital plates of both sexes with light brown pigmentation. Male. Distal part of subgenital plate translucent. Abdominal chaetotaxy as in Table 2and Fig. 210. Malegenitalia as in genus description and Figs 213–215. Proximal mesosome somewhat variable between specimens, rounded to flat; pmesnot visible in all specimens, including holotype. Measurements ex Laniarius erythrogaster(n = 6 except n = 5 for TL): TL = 1.75–1.92; HL = 0.47–0.50; HW = 0.53–0.56; PRW = 0.30–0.32; PTW = 0.48–0.51; AW = 0.65–0.72. Female. Posterior and median sections of tergopleurite IX+X with pale brown pigmentation. Abdominal chaetotaxy as in Table 2and Fig. 211. Subgenital plate irregularly rectangular, not reaching vulval marin ( Fig. 216). Vulval margin gently rounded ( Fig. 216), with 5–8 short, slender vmson each side, and 12–16 short, thornlike vsson each side. 6–10 long, slender vos; distal 1–2 vosmedian to vss. Some examined females (3 of 7) with 1– 2 thorn-like setae lateral to voson one side as in Fig. 216; these thorn-like setae are missing entirely in the remaining 4 females. Measurements ex Laniarius erythrogaster(n = 7): TL = 1.92–2.20; HL = 0.52–0.56; HW = 0.58–0.62; PRW = 0.34–0.38; PTW = 0.52–0.57; AW = 0.69–0.80.
Etymology.The species epithet is formed by Latin “ sex” for “six” and “ lobus” for “lobes”, referring to the six lobes of the male genitalia ( Figs 213–215).
Typematerial.Ex Laniarius erythrogaster: Holotype ♂, Uganda, Apr. 1936, R. Meinertzhagen, 7736 ( NHML). Paratypes: 5♂, 6♀, same data as holotype, 7735–6 ( NHML).
1587279392
Uganda
Uganda
133
134
2
holotype
1587279375
1936-04
NHML
R. Meinertzhagen
Uganda
Uganda
136
137
1
1
holotype
1587279387
[266,956,1038,1063]
1936-04
NHML
R. Meinertzhagen
Uganda
Uganda
136
137
11
6
5
paratype