Guimaraesiella (Cicchinella) gombakensis 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 : 482-484

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

( Figs 75–81 )

Type host. Turdinus abbotti abbotti (Blyth, 1845) —Abbott’s babbler ( Pellorneidae ). Type locality. Gombak, Malaysia.

Diagnosis. Guimaraesiella (C.) gombakensis is not particularly similar to any other species of the subgenus Cicchinella , but shares the extensive rugose areas and elongated distal nodi of the mesosome ( Fig. 79 ) with Guimaraesiella (C.) mcgrewi (see below) ( Fig. 87 ) and Guimaraesiella (C.) iuga (see below) ( Fig. 94 ). These three species also lack the mesosomal ventral sclerite ( Figs 79 , 87 , 94 ) and have a posteriorly displaced parameral head, with a fairly prominent bulge anterior to the main parameral head ( Figs 80 , 88 , 95 ). However, Guimaraesiella (C.) gombakensis can be separated from both these other species on the following characters: (1) proximal mesosome short, not overlapping with basal apodeme in G. (C.) gombakensis ( Fig. 78 ) but longer and with extensive overlapping with distal basal apodeme in G. (C.) mcgrewi ( Fig. 86 ) and G. (C.) iuga ( Fig. 93 ); (2) gonopore not clearly demarcated, with a comb-like structure on each side in G. (C.) gombakensis ( Fig. 79 ) but clearly demarcated and without such structure in G. (C.) mcgrewi ( Fig. 87 ) and G. (C.) iuga ( Fig. 94 ); (3) ames situated on distinct lateral bulges in G. (C.) gombakensis ( Fig. 79 ) but not visible in G. (C.) mcgrewi ( Fig. 87 ) and not situated on bulges in G. (C.) iuga ( Fig. 94 ); and (4) pst1–2 close together in G. (C.) gombakensis ( Fig. 80 ) but far apart in G. (C.) mcgrewi ( Fig. 88 ) and G. (C.) iuga ( Fig. 95 ).

Description. Both sexes. Head trapezoidal ( Fig. 77 ). Lateral margins of preantennal area concave. Dorsal preantennal suture reaches lateral margins of head, but does not completely separate dorsal anterior plate from main head plate. Head chaetotaxy as in Fig. 77 ; pns microsetae. Coni long, broad, reaching well beyond distal margin of scape. Antennae not sexually dimorphic. Gular plate broad, triangular. Thoracic and abdominal segments as in Figs 75–76 . Reentrant heads of pleurites slender and long.

Male. Thoracic and abdominal chaetotaxy as in Fig. 75 . Genitalia as in Figs 78–80 . Basal apodeme very broad ( Fig. 78 ), widening distally, with rounded proximal margin. Proximal mesosome broad and short ( Fig. 79 ), with distinct latero-ventral bulges near distal ends on which ames are situated. Ventral sclerite absent. Mesosomal lobes wide, angular, without lateral concavity. Marginal thickenings broad, not displaced medianly. Rugose area present, but not as distinct nodi. Elongated nodi present on distal mesosome. Gonopore not distinct, and with a unique comb-like structure on each side; 2 ames microsetae on each side on latero-ventral bulges; gpmes not visible in examined material; 2 lpmes microsetae on each side, situated on lateral margin, one distal and one proximal to rugose area. Parameral heads slanted posteriorly ( Fig. 80 ), irregular, with slight secondary bulge near proximal end. Parameral blades wide, tapering gently; pst1–2 close together. Measurements (n = 2): TL = 1.07–1.17; HL = 0.32; HW = 0.31–0.34; PRW = 0.19; PTW = 0.28; AW = 0.39–0.41.

Female. Thoracic and abdominal chaetotaxy as in Fig. 76 ; ss of tergopleurite VIII as long as ss of tergopleurites II–VII. Subgenital plate as in Fig. 81 ; cross-piece transparent, not clearly visible, with narrow connection to subgenital plate. Vulval margin gently rounded ( Fig. 81 ), with 2–3 slender vms on each side, and 7 thorn-like vss on each side; 4 slender vos on each side; distal vos median to vss. Measurements (n = 1): TL = 1.49; HL = 0.36; HW = 0.38; PRW = 0.21; PTW = 0.33; AW = 0.47.

Etymology. The species epithet is derived from the type locality.

Type material. Ex Turdinus abbotti abbotti : Holotype ♂, Gombak, Malaysia, 28 Jan. 1963, M-02301, 24703 on reverse (OSUS). Paratypes: 1♂, 1♀, Gombak , Malaysia, 29 Jan. 1963, M-02302, 24704 on reverse ( OSUS) .

Figures

FIGURES 75–76. Guimaraesiella (Cicchinella) gombakensis n. sp. 75, male, whole body, dorsal and ventral views. 76, female, whole body, dorsal and ventral views.

FIGURES 77–81. Guimaraesiella (Cicchinella) gombakensis n. sp. 77, male head, dorsal and ventral views. 78, male genitalia, dorsal view. 79, male mesosome, ventral view. 80, male paramere, dorsal view. 81, female subgenital plate and vulval margin, ventral view. Abbreviation: EN = elongated nodus.

FIGURES 84–89. Guimaraesiella (Cicchinella) mcgrewi n. sp. 84, male head, dorsal and ventral views. 85, female antenna, ventral view. 86, male genitalia, dorsal view. 87, male mesosome, ventral view. 88, male paramere, dorsal view. 89, female subgenital plate and vulval margin, ventral view.

FIGURES 92–96. Guimaraesiella (Cicchinella) iuga n. sp. 92, male head, dorsal and ventral views. 93, male genitalia, dorsal view. 94, male mesosome, ventral view. 95, male paramere, dorsal view. 96, female subgenital plate and vulval margin, ventral view.