Guimaraesiella (Cicchinella) ambusta 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 : 469-474

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

( Figs 47–53 )

Type host. Leiothrix argentauris rubrogularis Kinnear, 1925 —silver-eared mesia ( Leiothrichidae ).

Type locality. Shiwan Dashan National Park , Guangxi Province, China .

Diagnosis. Guimaraesiella (C.) ambusta is not particularly close to any other species within the subgenus Cicchinella , but is superficially similar to G. (C.) philiproundi , with which it shares the following characters: (1) female subgenital plates with central rugose pattern ( Figs 22 , 53 ); (2) proximal mesosome roughly rectangular ( Figs 20 , 51 ); (3) lateral margins of preantennal head convex ( Figs 17 , 49 ); and (4) pns microsetae ( Figs 17 , 49 ). However, these two species can be separated by the following characters: (1) antennae sexually dimorphic in G. (C.) philiproundi ( Figs 17–18 ) but not in G. (C.) ambusta ( Fig. 49 ); (2) female subgenital plate reticulated in G. (C.) philiproundi ( Fig. 22 ) but with latitudinal striation in G. (C.) ambusta ( Fig. 53 ); (3) mesosomal ventral sclerite with an anterior rugose area in G. (C.) ambusta ( Fig. 51 ) but without such area in G. (C.) philiproundi ( Fig. 20 ); (4) gonopore with complicated ornamentation in G. (C.) philiproundi ( Fig. 21 ) but simply crescent-shaped in G. (C.) ambusta ( Fig. 51 ); and (5) distal end of lateral concavity of mesosome with a comb-like structure in G. (C.) ambusta ( Fig. 51 ) but absent in all other species of Cicchinella .

Description. Both sexes. Head trapezoidal ( Fig. 49 ). Lateral margins of preantennal head slightly convex. Dorsal preantennal suture reaches lateral margin of head, but does not completely separate dorsal anterior plate from main head plate. Head chaetotaxy as in Fig. 49 ; pns microsetae. Coni broad, short, not reaching distal margin of scape. Antennae not sexually dimorphic. Gular plate broad, triangular. Thoracic and abdominal segments as in Figs 47–48 . Reentrant heads of pleurites long and broad, often blunter in more posterior segments.

Male. Thoracic and abdominal chaetotaxy as in Fig. 47 . Genitalia as in Figs 50–52 . Basal apodeme comparatively short ( Fig. 50 ), broad, rectangular. Proximal mesosome rectangular ( Fig. 51 ), with fairly straight lateral margins and flat ( Fig. 51 ) or slightly concave ( Fig. 50 ) anterior margin. Ventral sclerite broad, blunt with rugose anterior end. Mesosomal lobes with strongly sinuous lateral margins. Marginal thickenings of lobes not displaced medianly in anterior end, but displaced medianly at concavity. Posterior end of lateral concavity of mesosomal lobes with distinct comb-shaped structure unique within subgenus. Large almost oval nodi with rounded anterior margins on distal mesosome. Gonopore crescent-shaped; 2 ames microsetae on each side near antero-lateral corners of mesosomal lobes; gpmes not visible in examined material; 1 lpmes microseta on each side situated in lateral concavity. Parameral heads irregular ( Fig. 52 ), slanted. Parameral blades broad, tapering only distally; pst1–2 close together. Measurements (n = 4): TL = 1.21–1.30; HL = 0.33–0.34; HW = 0.33–0.34; PRW = 0.20–0.21; PTW = 0.28–0.31; AW = 0.43–0.53.

Female. Thoracic and abdominal chaetotaxy as in Fig. 48 ; ss of tergopleurite VIII much shorter than ss of tergopleurites II–VII. Subgenital plate as in Fig. 53 , with central latitudinal striation; cross-piece with moderate connection to subgenital plate. Vulval margin convergent to blunt median point ( Fig. 53 ), with 3–4 short, slender vms on each side, and 6–7 short, thorn-like vss on each side; 3–4 vos short, slender on each side; distal vos anterior to vss. Measurements (n = 4): TL = 1.61–1.75; HL = 0.36–0.38; HW = 0.37–0.39; PRW = 0.23–0.24; PTW =0.32– 0.35; AW = 0.48–0.51.

Etymology. The species epithet is derived from “ ambustus ”, Latin for “scorched”, referring to the dark lateral margins of the abdomen.

Type material. Ex Leiothrix argentauris rubrogularis : Holotype Ƌ, Shiwan Dashan National Park, Guangxi Province, China, 26 Apr. 2005, S.E. Bush & D.H. Clayton, host MBR-6721, KU collection; Lice P-673 (NHML). Paratypes: 1♂, 2♀, same data as holotype (PIPeR); 2♂, 2♀, same data as holotype, except host TJD-6245, lice P- 674 (PIPeR).

Figures

FIGURES 47–48. Guimaraesiella (Cicchinella) ambusta n. sp. 47, male, whole body, dorsal and ventral views. 48, female, whole body, dorsal and ventral views.

FIGURES 49–53. Guimaraesiella (Cicchinella) ambusta n. sp. 49, male head, dorsal and ventral views. 50, male genitalia, dorsal view. 51, male mesosome, ventral view. 52, male paramere, dorsal view. 53, female subgenital plate and vulval margin, ventral view.

FIGURES 17–22. Guimaraesiella (Cicchinella) philiproundi n. sp. 17, male head, dorsal and ventral views. 18, female antenna, ventral view. 19, male genitalia, dorsal view. 20, male mesosome, ventral view. 21, male paramere, dorsal view. 22, female subgenital plate and vulval margin, ventral view.