Indoceoplanetes (Indoceoplanetes) incisoma Gustafsson, 2022

Gustafsson, Daniel R. & Bush, Sarah E., 2022, Chewing lice of the Brueelia-complex (Phthiraptera: Ischnocera) parasitic on members of the Campephagidae (Aves: Passeriformes), with description of a new subgenus and 14 new species, Zootaxa 5165 (1), pp. 1-55 : 12-15

Indoceoplanetes (Indoceoplanetes) incisoma Gustafsson & Bush, new species

( Figs 22–28 )

Type host. Coracina macei siamensis (Baker, 1918) – large cuckooshrike.

Type locality. Khao Sawan Mountain , Sieo, Loei Province, Thailand .

Other host. Coracina macei rexpineti (Swinhoe, 1863) .

Diagnosis. Indoceoplanetes (Indoceoplanetes) incisoma new species is most similar to In. (In.) zambica new species, both sharing the following characters: mesosomal lobes widely divergent distally ( Figs 26 , 47 ); dorsal fringe of mesosome strongly tilted medio-posteriorly ( Figs 25 , 46 ); male tergopleurites IV–V with 1 ss on each side and tergopleurite VI with 2 ss on each side ( Figs 22 , 43 ).

These two species can be separated by the following characters: male sternite IV with 2 sts on each side in In. (In.) incisoma ( Fig. 22 ), but with 1 sts one each side in In. (In.) zambica ( Fig. 43 ); male abdominal segment VI with 3 ps on each side in In. (In.) incisoma ( Fig. 22 ), but with 1 ps on each side in In. (In.) zambica ( Fig. 43 ); anterolateral extensions of proximal mesosome more slender in In. (In.) incisoma ( Fig. 26 ) than in In. (In.) zambica ( Fig. 47 ); mesosome proportionately broader in In. (In.) incisoma ( Fig. 26 ), but narrower in In. (In.) zambica ( Fig. 47 ; female subgenital plates of different shapes (cf. Figs 28 , 49 ).

Description. Both sexes. Head rounded trapezoidal ( Fig. 24 ), lateral margins of preantennal area convex, frons broadly concave. Marginal carina broad, inner margin irregular, deeply displaced and widened at osculum. Ventral anterior plate rounded triangular, with concave lateral margins. Head chaetotaxy as in Fig. 24 . Preantennal nodi broad, bulging. Pre- and post-ocular nodi large, connected dorsally by broad ocular band. Marginal temporal carina slender. Gular plate triangular. Thoracic and abdominal segments as in Figs 22–23 . Base pigmentation pale yellow translucent; preantennal and preocular nodi dark brown; margins of antennal sockets, ocular band, postocular nodi, parts of mandibular framework, gular plate, proepimera, metepisterna, sternal plates IV–VI and subgenital plates medium brown.

Male. Thoracic and abdominal chaetotaxy as in Fig. 22 ; tergopleurites IV–V with 1 ss on each side and tergopleurite VI with 2 ss on each side; sternite IV with 2 sts on each side; abdominal segment VI with 3 ps on each side. Basal apodeme broad, narrowing distally ( Fig. 25 ). Proximal mesosome with antero-lateral extensions ( Fig. 26 ), proximal margin concave. Mesosomal lobes widely divergent distally. Distal margin of mesosome slightly concave, bulging medianly. Gonopore with slightly fringed lateral margins of antero-lateral extensions. Dorsal fringe tilted distinctly posteriorly, without thumb-like process. Chaetotaxy: 1 gpmes microseta on each side of distal gonopore; 2 lpmes sensilla on each mesosomal lobe; 1 ames microseta anterior to dorsal fringe on each side. Parameres and pst1–2 as in Fig. 27 . Measurements as in Table 1 .

Female. Thoracic and abdominal chaetotaxy as in Fig. 23 . Subgenital plate trapezoidal, lateral margins slightly concave, distal margin flattened ( Fig. 28 ). Vulval margin flattened to slightly concave medianly, with 2–3 short, slender vms and 1–2 short, thorn-like vss on each side; 4–7 slender vos on each side of subgenital plate; distal 2–3 vos median to vss, substantially longer than vms. Measurements as in Table 1 .

Etymology. The species epithet is derived from Latin “ incus ” for “anvil” and Greek “ soma ” for “body”, referring to the shape of the proximal mesosome.

Type material. Ex Coracina macei siamensis [as C. novaehollandiae siamensis ]: Holotype ♂, Khao Sawan Mountain, Sieo, Loei Province, Thailand, 29 Nov. 1955, R.E. Elbel & B. Lekagul, RE-3177, RT-B-22605 ( BPBM). Paratypes: 1♀, same data as holotype ( BPBM); 1♂, 1♀, Pang La, Lampang Province, Thailand, 7 Feb. 1953, R.E. Elbel & H.G. Deignan, RE-2242, RT-B-17752 ( PIPR); 1♂, 1♀, Non Han Ban N Nong Thum, Chumphae, Khon Kaen Province, Thailand, 28 Oct. 1953, R.E. Elbel & B. Lekagul, RE-3085, RT-B-22571 ( PIPR); 1♂, 1♀, same locality and collectors, 4 Nov. 1953, RE-3124, RT-B-22586 ( PIPR).

Additional material examined (non-types): Ex Coracina macei rexpineti : 3 ♂, Jing Xin County, Guanxi Province, China, 29 Sep. 2004, S.E. Bush, P#354, AM-435, PIPR#84 and #53 ( PIPR).

Remarks. Samples from the two host subspecies are largely indistinguishable, but abdominal setae are generally longer and the antero-lateral extensions of the proximal mesosome are slightly larger in specimens from C. m. rexpineti than in those from the type host. We do not consider these differences significant, and treat all material from both host subspecies as conspecific.

Figures

FIGURES 22–23. Indoceoplanetes (Indoceoplanetes) incisoma new species ex Coracina macei siamensis. 22, male habitus, dorsal and ventral views. 23, female habitus, dorsal and ventral views.

FIGURES 24–28. Indoceoplanetes (Indoceoplanetes) incisoma new species ex Coracina macei siamensis. 24, male head, dorsal and ventral views. 25, male genitalia, dorsal view. 26, male mesosome, ventral view. 27, male paramere, dorsal view. 28, female subgenital plate and vulval margin, ventral view.

FIGURES 45–49. Indoceoplanetes (Indoceoplanetes) zambica new species ex Coracina pectoralis. 45, male head, dorsal and ventral views. 46, male genitalia, dorsal view. 47, male mesosome, ventral view. 48, male paramere, dorsal view. 49, female subgenital plate and vulval margin, ventral view.

FIGURES 43–44. Indoceoplanetes (Indoceoplanetes) zambica new species ex Coracina pectoralis. 43, male habitus, dorsal and ventral views. 44, female habitus, dorsal and ventral views.