Couala angulata ( Piaget, 1880 )

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: 311-314

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-FEBC-FEFA-FF74-6664FADEFE0E

treatment provided by

Plazi

scientific name

Couala angulata ( Piaget, 1880 )
status

 

Couala angulata ( Piaget, 1880) 

( Figs 518–523View FIGURE 518 – 519View FIGURES 520 – 523)

Nirmus angulatus Piaget, 1880: 134  .

Degeeriella angulata ( Piaget, 1880)  ; Harrison, 1916: 108. Brueelia angulata ( Piaget, 1880)  ; Hopkins & Clay, 1952: 53.

Type host. Asio flammeus (Pontoppidan, 1763)  —short-eared owl (in Error). Type locality. Zoological Garden, Rotterdam.

Other host. Coua caerulea (Linnaeus, 1766)  —blue coua  .

Description. Both sexes. Head shape, structure, and chaetotaxy as in genus description and Fig. 520View FIGURES 520 – 523. Temples acutely angular, occiput deeply concave. Marginal and marginal temporal carinae very broad. Preantennal, preocular, and postocular nodi very large. Ventral carina broad and diffuse anterior to pulvinus. Coni long, reaching well beyond distal margin of scape. Lateral margin of antennal canal clearly demarcated, continuing to posterior margin of head, which it reaches just median to mts  3; median margin of antennal canal clearly demarcated for anterior fourth; mts  2 curved, spine-like, just lateral to mts  3, and clearly ventral. Gular plate pointed. Thoracic and abdominal segments as in genus description and Figs 518–519View FIGURE 518 – 519.

Male. Subgenital plate ( Fig. 518View FIGURE 518 – 519) trapezoidal, narrowing at posterior extreme. Abdominal chaetotaxy as in Table 2 and Fig. 518View FIGURE 518 – 519. Male genitalia ( Figs 521–522View FIGURES 520 – 523) distinct. Basal apodeme long, slender. Proximal mesosome fused to and not distinguishable from basal apodeme. Gonopore elongated, open distally, with anterior extension on ventral side ( Fig. 522View FIGURES 520 – 523). Mesosomal lobes large, quadratic, intensely papillate and rugose on dorsal surface and median, distal, and lateral margins; 2 ames sensilla on each side lateral to gonopore; 2 pmes microsetae on each side marginal on postero-lateral corner of rugose area on lobes, where the mesosome is fused to the parameres; pmes often hard to see due to papillation. Parameral heads ( Fig. 522View FIGURES 520 – 523) fused to postero-lateral mesosomal lobes, but lateral ends of heads not fused, angular. Parameral blades strongly curved, convergent; pst1–2 as in genus description. Measurements ex Coua caerulea  (n = 22): TL = 1.17–1.30 (1.24); HL = 0.35–0.39 (0.37); HW = 0.42– 0.49 (0.45); PRW = 0.24–0.27 (0.25); PTW = 0.37–0.41 (0.39); AW = 0.49–0.61 (0.54).

Female. Abdominal chaetotaxy as in Table 2 and Fig. 519View FIGURE 518 – 519. Subgenital plate broadly rounded trapezoidal ( Fig. 523View FIGURES 520 – 523), not approaching vulval margin. Vulval margin ( Fig. 523View FIGURES 520 – 523) with broad, rounded rectangular bulge medianly; 5– 8 large, spine-like vms on each side, and 3–5 minute vss on each side, restricted to median section of vulval margin; 4–5 long, slender vos; 1 vos median to vms, near vulval margin. Measurements ex Coua caerulea  (n = 25): TL = 1.38–1.63 (1.50); HL = 0.40–0.44 (0.42); HW = 0.48–0.55 (0.51); PRW = 0.27–0.29 (0.28); PTW = 0.39–0.45 (0.41); AW = 0.52–0.68 (0.61).

Type material. Ex Asio otus  : Holotype ♂, Piaget Collection, 1013 (NHML).

Additional material examined (non-types)

Ex Coua caerulea  : 37♂, 38♀, Madagascar, R. Meinertzhagen, 16648 ( NHMLAbout NHML). 

Remarks. The type host was given by Piaget (1880: 135) as Strix flammea  [= Asio flammeus (Pontoppidan, 1763)  ] from the Zoological Garden in Rotterdam, but Asio flammeus  does not occur in Madagascar, only Asio madagascariensis (A. Smith, 1834)  . The holotype of Couala angulata  is identical to material from Coua caerulea (Linnaeus, 1766)  . Considering that all the hosts of species of Couala  n. gen. are from Madagascar, we believe that either Piaget was mistaken about the host, or that contamination had occurred at the zoological garden.

NHML

Natural History Museum, Tripoli

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Phthiraptera

Family

Philopteridae

Genus

Couala

Loc

Couala angulata ( Piaget, 1880 )

Bush, Sarah E. 2017
2017
Loc

Degeeriella angulata (

Hopkins 1952: 53
Harrison 1916: 108
1916
Loc

Nirmus angulatus

Piaget 1880: 134