Schizosairhynchus minovenator Gustafsson & Bush

Bush, Sarah E., 2017, Morphological revision of the hyperdiverse Brueelia - complex (Insecta: Phthiraptera: Ischnocera: Philopteridae) with new taxa, checklists and generic key, Zootaxa 4313 (1), pp. 1-443: 282-285

publication ID

https://doi.org/10.11646/zootaxa.4313.1.1

publication LSID

lsid:zoobank.org:pub:A5Fdfba5-F992-44A8-84C2-1756C943C19B

persistent identifier

http://treatment.plazi.org/id/832187E9-FE93-FEDF-FF74-6181FE0CFC23

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Plazi

scientific name

Schizosairhynchus minovenator Gustafsson & Bush
status

new species

Schizosairhynchus minovenator Gustafsson & Bush  , new species

( Figs 470–476View FIGURES 470 – 471View FIGURES 472 – 476)

Type host. Mino dumontii Lesson, 1827  —yellow-faced myna.

Type locality. Popondetta, elev. 200 ft, Northern District, Papua New Guinea.

Diagnosis. Schizosairhynchus minovenator  n. sp. ( Figs 470–476View FIGURES 470 – 471View FIGURES 472 – 476) is most similar to Sc. philippensis  and males of these two species share the following characters ( Fig. 474View FIGURES 472 – 476): distal mesosome very wide; pmes antero-lateral to rugose nodi; rugose nodi extensive; ventral sclerite extends distal to gonopore; paired nodi just distal to gonopore. Male Sc. minovenator  can be told apart from male Sc. philippensis  by the following genital characters: ventral sclerite extended towards rugose nodi in Sc. philippensis  but not in Sc. minovenator  ( Fig. 474View FIGURES 472 – 476); rugose nodi reach lateral margins of mesosome in Sc. philippensis  but not in Sc. minovenator  ( Fig. 474View FIGURES 472 – 476); distal thickening of mesosome with submedian triangular extensions in Sc. philippensis  but not such extensions in Sc. minovenator  ( Fig. 474View FIGURES 472 – 476). Most variation in setal characters in Sc. philippensis  cannot presently be assessed, as too little material has been examined. However, some differences in the setae of the female genitalia are apparent: Sc. minovenator  typically have 25–29 vss, whereas Sc. philippensis  typically have 23–24 vss; Schizosairhynchus minovenator  have 13–16 vos ( Fig. 476View FIGURES 472 – 476), whereas Sc. philippensis  have 7–8. Differences in vms are not diagnostic, as there is overlap between Sc. philippensis  and Sc. minovenator  .

Description. Both sexes. Head shape, structure, and chaetotaxy as in genus description and Fig. 472View FIGURES 472 – 476. Lateral margins of dorsal anterior plate strongly convex. Lateral bulge of preantennal area just anterior to conus prominent. Thoracic and abdominal segments as in genus description and Figs 470–471View FIGURES 470 – 471. Tergopleural and sternal plates light brown; antero-lateral tergopleurites and pleurites darker.

Male. Abdominal chaetotaxy as in Table 2 and Fig. 470View FIGURES 470 – 471. Sternal plates III –VI each with small accessory plate laterally ( Fig. 470View FIGURES 470 – 471); 2 accessory plates lateral to subgenital plate on each side. Basal apodeme rounded rectangular to trapezoidal ( Fig. 473View FIGURES 472 – 476). Proximal mesosome broadly rectangular, with convex, thickened anterior margin. Gonopore ventral ( Fig. 474View FIGURES 472 – 476), narrowly open distally, associated with pair of sublateral nodi just posterior to gonopore. Mesosomal lobes wide, fused distally, and with distal margin thickened. Ventral sclerite extends distal to gonopore, with thickened anterior margin. Rugose nodi extensive; 2 ames microsetae on each side antero-lateral to gonopore; 2 pmes microsetae on each side on lateral margin of mesosomal lobes antero-lateral to rugose nodi. Parameral heads wide, roughly rectangular. Parameral blades blunt distally ( Fig. 475View FIGURES 472 – 476); pst1–2 as in genus description. Measurements ex Mino dumontii  (n = 17 except n = 15 for TL and AW): TL = 1.49–1.65 (1.56); HL = 0.54–0.59 (0.57); HW = 0.53–0.58 (0.56); PRW = 0.32–0.37 (0.34); PTW = 0.48–0.54 (0.50); AW = 0.66–0.79 (0.73).

Female. Abdominal chaetotaxy as in Table 2 and Fig. 471View FIGURES 470 – 471. Accessory sternal plates very small, not always visible, but present on segments III –VI and lateral to subgenital plate. Sternal plates not very wide ( Fig. 471View FIGURES 470 – 471). Subgenital plate roughly triangular ( Fig. 476View FIGURES 472 – 476), not flaring into cross-piece distally. Vulval margin gently rounded ( Fig. 476View FIGURES 472 – 476), with 8–11 slender vms on each side; median vms much shorter than lateral vms. 25–29 short, thorn-like vss on each side; 13–16 long, slender vos; proximal 8–10 vos scattered on subgenital plate, distal 5–6 vos on distal margin of subgenital plate, median to vss. Measurements ex Mino dumontii  (n = 19 except n = 18 for TL and n = 17 for AW): TL = 1.79–2.05 (1.93); HL = 0.58–0.65 (0.62); HW = 0.57–0.65 (0.62); PRW = 0.36–0.42 (0.38); PTW = 0.53–0.61 (0.56); AW = 0.83–1.06 (0.89).

Etymology. The s pecies epithet is formed by the genus name of the host, Mino Lesson, 1827  , combined with the Latin “ venator ” for “hunter”.

Type material. Ex Mino dumontii  : Holotype ♂, vicinity of Popondetta, elev. 200 ft, Northern District, Papua New Guinea, 30 Sep. 1963, H. Clissold, BBM-NG-29747 ( BPBMAbout BPBM)  . Paratypes: 1♂, 1♀, same data as holotype ( BPBMAbout BPBM)  ; 1♀, Popondetta , elev. 200 m, Northern District, Papua New Guinea, 31 Aug. 1963, P.J. Shanahan, BBM- NG-28671 ( BPBMAbout BPBM)  ; 3♀, Jumbora Plantation , elev. 200 ft, [Popondetta,] Northern District, Papua New Guinea, 14 Sep. 1963, H. Clissold, BBM-NG-28739, 28752 ( BPBMAbout BPBM)  ; 1♀, same locality and collectior as previous, 15–16 Sep. 1963, H. Clissold, BBM-NG-28745 ( BPBMAbout BPBM)  ; 6♂, 4♀, same locality and collector as previous, 18 Sep. 1963, H. Clissold, BBM-NG-28774, 28795–7, 28801, 28807 ( BPBMAbout BPBM) [some slides contain unidentified Philopterus  s. lat.]  . 2♂, 3♀, same locality and collector as previous, 26 Sep. 1963, H. Clissold, BBM-NG-28739, 28748 (PIPeR) [one slide also contains unidentified Brueelia  s. str.]  . 1♂, Buka-Bara , sea level, Northern District, Papua New Guinea, 21 Sep. 1963, P.J. Shanahan, BBM-NG-28815 ( BPBMAbout BPBM)  ; 5♂, 8♀, Soputa River , elev. 200 ft, Northern District, Papua New Guinea, 29–30 Sep. 1963, H. Clissold, BBM-NG-29916, 29730 ( BPBMAbout BPBM)  ; 3♂, 1♀, Azarita , elev. 100 ft, Northern District, Papua New Guinea, 9 Oct. 1963, H. Clissold, BBM-NG-29915 ( BPBMAbout BPBM)  ; 2♂, 2♀, Ambunti , elev. 200 ft, West Sepik District, Papua New Guinea, 5 May 1963, P. Temple, BBM-NG-22560 ( BPBMAbout BPBM)  ; 2♀, Finschhafen , elev. 100 ft, Morobe District, Papua New Guinea, 11 Apr. 1963, H. Clissold, BBM-NG-27647 ( BPBMAbout BPBM)  ; 1♂, 1♀, vicinity of Lae , elev. 30 m, Singanwa River, Morobe District, Papua New Guinea, 15 Apr. 1966, P.J. Shanahan, BBM-NG-24809 ( BPBMAbout BPBM)  ; 1♀, Balimo , elev. 30 ft, Western District, Papua New Guinea, 28 Mar. 1964, H. Clissold, BBM-NG-50391 ( BPBMAbout BPBM)  ; 1♂, Oriomo River, elev. 20 ft, Western District , Papua New Guinea, 9 Feb. 1964, H. Clissold, BBM-NG-29442 ( BPBMAbout BPBM)  ; 1♂, same locality and collector as previous, 26 Feb. 1964, BBM-NG-50035 ( BPBMAbout BPBM)  .