Guimaraesiella (Cicchinella) hampuslybecki Gustafsson, Clayton

Gustafsson, Daniel R., Clayton, Dale H. & Bush, Sarah E., 2019, Twelve new species of Guimaraesiella (Phthiraptera: Ischnocera: Philopteridae) from “ babblers ” (Passeriformes: Leiothrichidae, Pellorneidae, Timaliidae) with a description of a new subgenus and a key to its species, Zootaxa 4543 (4), pp. 451-497 : 479

Guimaraesiella (Cicchinella) hampuslybecki Gustafsson, Clayton & Bush, new species

( Figs 67–74 )

Type host. Heterophasia auricularis (Swinhoe, 1864) —white-eared sibia ( Leiothrichidae ).

Type locality. Liukuei , Taiwan .

Diagnosis. Guimaraesiella (C.) hampuslybecki is most similar to G. (C.) hannesundinae , with which it shares the characters listed under the latter species, above. However these two species can be separated by the following characters: (1) female subgenital plate with central reticulation in G. (C.) hampuslybecki ( Fig. 74 ) but not in G. (C.) hannesundinae ( Fig. 66 ); (2) single thorn-like setae lateral to vos in G. (C.) hannesundinae ( Fig. 66 ) but no such seta in G. (C.) hampuslybecki ( Fig. 74 ); (3) ss of female tergopleurite VIII short in G. (C.) hampuslybecki ( Fig. 68 ) but long in G. (C.) hannesundinae ( Fig. 60 ); (4) mesosomal ventral sclerite long and slender in G. (C.) hampuslybecki ( Fig. 72 ) but short and blunt in G. (C.) hannesundinae ( Fig. 64 ); (5) marginal thickenings of mesosomal lobes broad and not displaced at concavity in G. (C.) hannesundinae ( Fig. 64 ) but slender and displaced medianly at concavity in G. (C.) hampuslybecki ( Fig. 72 ); (6) ames sensilla in G. (C.) hampuslybecki (Fig, 72) but microsetae in G. (C.) hannesundinae ( Fig. 64 ); and (7) papillate area of parameral heads more extensive in G. (C.) hannesundinae ( Fig. 65 ) than in G. (C.) hampuslybecki ( Fig. 73 ).

Description. Both sexes. Head rounded pentagonal ( Fig. 69 ). Lateral margins of preantennal head convex. Dorsal preantennal suture does not reach lateral margin of head, and does not completely separate dorsal anterior plate from main head plate. Attachments of mandibular adductor muscles prominent. Head chaetotaxy as in Fig. 69 ; pns microsetae. Coni long, broad, reaching distal margin of scape in female. Antennae sexually dimorphic. Gular plate roughly triangular. Thoracic and abdominal segments as in Figs 67–68 . Reentrant heads of pleurites broader and blunter in male than in female.

Male. Scape as in Fig. 69 . Thoracic and abdominal chaetotaxy as in Fig. 67 . Genitalia as in Figs 71–73 . Basal apodeme broader distally than proximally ( Fig. 71 ), with rounded to slightly flattened proximal margin. Proximal mesosome roughly rectangular ( Fig. 72 ), with bulging lateral margins. Ventral sclerite slender, with median elongation that almost reaches proximal margin of mesosome. Mesosomal lobes with strongly sinuous lateral margins. Marginal thickenings of mesosomal lobes displaced medianly at concavity, and continuous with broad, rounded trapezoidal nodi on distal mesosome. Gonopore complicated, as in Fig. 72 ; 2 ames sensilla on each side near antero-lateral corners of mesosomal lobes; gpmes not visible in examined material; 2 lpmes microsetae on each side situated in lateral concavity. Parameral heads irregular ( Fig. 73 ). Parameral blades broad, tapering only distally; pst1–2 close together. Measurements (n = 7, except for TL where n = 6): TL = 1.11–1.23; HL = 0.32–0.34; HW = 0.32–0.35; PRW = 0.20–0.22; PTW = 0.31–0.34; AW = 0.44–0.49.

Female. Scape as in Fig. 70 . Thoracic and abdominal chaetotaxy as in Fig. 68 . ss of tergopleurite VIII much shorter than ss of tergopleurites II–VII. Subgenital plate as in Fig. 74 , with extensive central reticulation; crosspiece with broad connection to subgenital plate. Vulval margin gently rounded ( Fig. 74 ), with 2–3 slender vms on each side, and 6–10 thorn-like vss on each side; 4–5 vos on each side; distal vos situated anterior to vss. Measurements (n = 4): TL = 1.50–1.68; HL = 0.35–0.38; HW = 0.37–0.41; PRW = 0.21–0.26; PTW = 0.33–0.38; AW = 0.52–0.56.

Etymology. The species epithet is in honor of Hampus Lybeck (previously at the University of Gothenburg, Sweden) who assisted DRG while collecting lice in Sweden in 2007–2008, and has remained a good friend and bird-watching companion to DRG ever since.

Type material. Ex Heterophasia auricularis : Holotype Ƌ, Liukuei, Taiwan, T.C. Maa, TMT- 1764–1765 (UMSP). Paratypes: 1♂, 1♀, same data as holotype ( UMSP) ; 2♂, 1♀, Puli Nantou Hsien, Taiwan, Jan. 1964, T.C. Maa, TMT-185–188 ( UMSP) ; 1♂, 1♀, same data (PIPeR) ; 1♂, 1♀, same data except TMT-419 ( UMSP) ; 1♂, same data as holotype (PIPeR) .

Figures

FIGURES 67–68. Guimaraesiella (Cicchinella) hampuslybecki n. sp. 67, male, whole body, dorsal and ventral views. 68, female, whole body, dorsal and ventral views.

FIGURES 69–74. Guimaraesiella (Cicchinella) hampuslybecki n. sp. 69, male head, dorsal and ventral views. 70, female antenna, ventral view. 71, male genitalia, dorsal view. 72, male mesosome, ventral view. 73, male paramere, dorsal view. 74, female subgenital plate and vulval margin, ventral view.

FIGURES 61–66. Guimaraesiella (Cicchinella) hannesundinae n. sp. 61, male head, dorsal and ventral views. 62, female antenna, ventral view. 63, male genitalia, dorsal view. 64, male mesosome, ventral view. 65, male paramere, dorsal view. 66, female subgenital plate and vulval margin, ventral view.

FIGURES 59–60. Guimaraesiella (Cicchinella) hannesundinae n. sp. 59, male, whole body, dorsal and ventral views. 60, female, whole body, dorsal and ventral views.

FIGURES 1–2. Guimaraesiella (Cicchinella) sehri (Ansari, 1955). 1, male, whole body, dorsal and ventral views. 2, female, whole body, dorsal and ventral views.