. Bulletin - United States National Museum. Science. NEMATODE PARASITES OF BIRDS 201 Morphology.—Third stage larva (fig. 272) : mm. long by 410> wide; tail 158//, long. Precervical papillae 77/x from cephalic end; buccal cavity 60/*, muscular esophagus 440/*, glandular esopha- gus mm. long. Distribution.—Africa (Algeria). This larva had apparently encysted in an aberrant host. Since the adult is probably a bird form, the above description is included here. Genus VIGUIERA Seurat, 1913b Generic diagnosis.—Spirurinae (p. 164) : Body suddenly narrowed in anterior region. Cephalic extre
. Bulletin - United States National Museum. Science. NEMATODE PARASITES OF BIRDS 201 Morphology.—Third stage larva (fig. 272) : mm. long by 410> wide; tail 158//, long. Precervical papillae 77/x from cephalic end; buccal cavity 60/*, muscular esophagus 440/*, glandular esopha- gus mm. long. Distribution.—Africa (Algeria). This larva had apparently encysted in an aberrant host. Since the adult is probably a bird form, the above description is included here. Genus VIGUIERA Seurat, 1913b Generic diagnosis.—Spirurinae (p. 164) : Body suddenly narrowed in anterior region. Cephalic extremity covered by a circular disk which projects slightly from the underlying part; posterior to this compression, 2 papillae. Buccal cavity cylindrical, with thick walls,. Fig. 272.—Hartertia zorillab. Third stage larva. «, Lateral view of head; &, ventral view of head ; c, ventral ; d, lateral view of tail. After Seurat, 1919 30 to 50//. long. No lateral alae. Two precervical papillae situated far anterior to the nerve ring. Male with caudal extremity rolled in spiral; bursal alae asymmetrical; 9 preanal papillae (Seurat says 9 pairs but figures them as single in the type-species) on the left side, 7 on the right side; 2 pairs of postanal papillae. Spicules very unequal. No gorgeret. Female with vulva in posterior region of body, near anus. Parasitic in proventriculus of birds. Type-species.—Viguiera eun/optera (Rudolphi, 1819) Seurat, 1913. VIGUIERA EURYOPTERA (Rudolphi, 1979) Seurat, 1913b Synonym,.—Spiroptera eumjoptera Rudolphi, 1819. Host.—Primary: Lanius collurio, L. excubitor, L. minor, L. rufus; also " pie-grieche a tete rouge "; secondary: Unknown. Location.—Proventriculus. Morphology.—Viguiera (p. 201) : Cuticle thick, transversely stri- ated. Muscular esophagus very slender, surrounded toward its posterior third by the nerve ring, posterior to which is situated the excretory Please note that these images are extracted from scan
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
