title: Further studies on Contracaecum               spasskii Mozgovoi, 1950 and C. rudolphii Hartwich, 1964 (sensu lato) (Ascaridida: Anisakidae) from piscivorous birds in China.
abstract: Contracaecum                 spasskii Mozgovoi, 1950, collected from the great crested grebe Podiceps cristatus (Linnaeus) (Podicipediformes: Podicipedidae), is redescribed using both light and, for the first time, scanning electron microscopy. Contracaecum                 spasskii differs from its congeners by having marked transverse cuticular annulations, the length of the oesophagus and spicules, the ratio between the intestinal caecum and the ventricular appendix, the number and arrangement of male caudal papillae, and especially by the particular morphology of the lips and interlabia. Some previously unreported morphological features of C.                 spasskii are also revealed and others corrected. Contracaecum rudolphii Hartwich, 1964 (sensu lato) is also redescribed based on the specimens collected from the great cormorant Phalacrocorax carbo                 sinensis (Blumenbach) (Pelecaniformes: Phalacrocoracidae) from China. Based on the geographical perspective, the present Chinese material may represent the species C. rudolphii B.
authors: College of Life Science, Hebei Normal University, Shijiazhuang 050024, Hebei Province, People's of Republic of China. liangliangex369@126.com
authors: Liang
authors: L
authors: Li
authors: Zhen
authors: Z
authors: Xu
authors: Lu-Ping
authors: LP
authors: Zhang
mesh_terms: D000818:Animals; D017162:Ascaridida / Q000033:anatomy & histology / Q000145:classification* / Q000648:ultrastructure*; D001717:Birds / Q000469:parasitology; D002681:China; D005260:Female; D008297:Male; D008855:Microscopy, Electron, Scanning; D013045:Species Specificity
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