Amin Omar M, Heckmann Richard A, Shareef P A Ahammed
Institute of Parasitic Diseases, 11445 E. Via Linda, no. 2-419, Scottsdale, Arizona 85259. Correspondence should be sent to Omar M. Amin at:
J Parasitol. 2017 Jun;103(3):251-256. doi: 10.1645/16-153. Epub 2017 Mar 23.
Pallisentis indica Mital and Lal, 1976 was originally described from Channa gachua Hamilton (Channidae) in Kali Nadi River, Aligarh, India. The parasite was later placed in the subgenus Brevitritospinus Amin, Heckmann, Ha, Luc, and Doanh, 2000 . Our collection from the spotted snakehead Channa punctatus Bloch & Schneider in another locality of the same stream in Aligarh produced many specimens with variable traits, revealing new structures that have never before been described in the Acanthocephala, especially relating to the ducted trunk spines. The proboscis has 4 circles of 10 hooks each, with hooks in the anterior 2 circles being considerably larger than those in the posterior 2 circles. Y-shaped trunk spines are ducted in 2 regions separated by a spineless zone. The anterior collar spines are in complete rings of 9-17 circles of crowded spines and the larger posterior trunk spines are in 1 (posterior) to 41 (anterior) circles extending to level of cement glands in males posteriorly. Considerable variations from the original description and new structures are reported for the first time.
印度帕利森棘头虫（Pallisentis indica Mital and Lal，1976）最初是从印度阿里格尔卡里纳迪河的汉氏鳢（Channa gachua Hamilton，鳢科）中描述的。该寄生虫后来被归入短刺亚属（Brevitritospinus Amin, Heckmann, Ha, Luc, and Doanh，2000）。我们从阿里格尔同一条溪流另一个地点的斑鳢（Channa punctatus Bloch & Schneider）采集到了许多具有不同特征的标本，揭示了棘头虫目中前所未有的新结构，特别是与有管道的躯干棘有关的结构。吻部有4圈，每圈10个钩，前两圈的钩比后两圈的钩大得多。Y形躯干棘在两个区域有管道，中间由一个无棘区域隔开。前部颈棘呈9 - 17圈密集棘的完整环，较大的后部躯干棘在雄性中呈1（后部）至41（前部）圈，向后延伸至水泥腺水平。首次报道了与原始描述的显著差异和新结构。
