Hysterothylacium gibsoni sp. nov. and H. tetrapteri (Bruce et Cannon, 1989) (Nematoda: Ascaridida) from the Chinese marine fishes.
A new species of ascaridoid nematode, Hysterothylacium gibsoni sp. nov., is described based on specimens collected from the intestine of the slender lizardfish Saurida elongata (Temminck et Schlegel) (Aulopiformes: Synodontidae) in the Yellow Sea, China. The new species differs from its congeners by its small body size (12.8-13.2 mm), the absence of cervical alae, a very short intestinal caecum (representing 8.86-9.52% of oesophageal length) and a long ventricular appendix (intestinal caecum to ventricular appendix ratio 1:15.3-20.0), short spicules (0.38-0.41 mm, representing 2.97-3.11% of body length), the number and arrangement of the caudal papillae (25-28 pairs arranged as follows: 18-22 pairs precloacal, 3 pairs paracloacal, and 3-4 pairs postcloacal). In addition, Hysterothylacium tetrapteri (Bruce et Cannon, 1989) is also redescribed based on the material collected from the striped marlin Kajikia audax (Philippi) (Perciformes: Istiophoridae) in the South China Sea.
Medical College of Hebei University of Engineering, 056002, Handan, Hebei Province, P. R. China.
Zhen
Z
Xu
Liang
L
Li
Lu-Ping
LP
Zhang
D000825:Animal Structures / Q000033:anatomy & histology; D000818:Animals; D059001:Aquatic Organisms / Q000469:parasitology; D017191:Ascaridida Infections / Q000469:parasitology / Q000662:veterinary*; D001199:Ascaridoidea / Q000033:anatomy & histology / Q000145:classification* / Q000302:isolation & purification*; D002681:China; D005393:Fish Diseases / Q000469:parasitology*; D005399:Fishes / Q000469:parasitology*