Hoberg E P, Lloyd S, Omar H
United States Department of Agriculture, Agricultural Research Service, Beltsville, Maryland 20705-2350.
J Parasitol. 1995 Feb;81(1):85-93.
Libyostrongylus dentatus sp. n. is described from ostriches on farms from North Carolina and Texas. Nematodes were recovered from the posterior proventriculus and under the koilon lining of the gizzard; the parasites occurred in mixed infections with Libyostrongylus douglassii. The species is distinguished from congeners by the presence of a prominent, dorsal, esophageal tooth; in males by the structure of the dorsal ray and spicules; and in females by small eggs (52-62 microns in length), a sublateral vulva situated at 93% of the body length from the anterior, and a strongly curled, digitate, tail with cuticular inflations at the anus. Conflicts in the generic diagnoses of Libyostrongylus and Paralibyostrongylus were apparent, based on the structure of the dorsal ray or position of rays 3-5 of the copulatory bursa. These can only be resolved based on phylogenetic analyses of the 11 nominal species referred to these genera.
新种齿状利比亚圆线虫（Libyostrongylus dentatus sp. n.）是从北卡罗来纳州和得克萨斯州农场的鸵鸟体内发现并描述的。线虫是从腺胃后部和肌胃角质衬里下方采集到的；这些寄生虫与道格拉斯利比亚圆线虫（Libyostrongylus douglassii）混合感染。该物种与同属其他物种的区别在于有一个突出的背侧食管齿；雄性的背肋和交合刺结构；雌性的特征是卵小（长52 - 62微米），侧位阴门位于身体前部长度的93%处，尾部强烈卷曲、呈指状，肛门处有角质层膨大。基于背肋结构或交配囊射线3 - 5的位置，利比亚圆线虫属（Libyostrongylus）和副利比亚圆线虫属（Paralibyostrongylus）的类属诊断存在明显冲突。这些只能通过对归属于这些属的11个命名物种进行系统发育分析来解决。
