Laskowski Zdzisław, Zdzitowiecki Krzysztof
W. Stefański Institute of Parasitology, Polish Academy of Sciences, ul. Twarda 51/55, 00 818 Warszawa, Poland.
Syst Parasitol. 2004 Sep;59(1):39-44. doi: 10.1023/B:SYPA.0000038443.88348.0b.
Aspersentis johni (Baylis, 1929) (Acanthocephala: Heteracanthocephalidae) is redescribed based on specimens collected from a sub-Antarctic nototheniid fish, Patagonotothen longipes. Hosts were caught in the Beagle Channel (Magellanic subregion). The redescription incorporates previously undescribed or poorly described features and complete measurements. Acanthocephalans of the genus Aspersentis have a strong dorso-ventrally asymmetrical armament of the proboscis (ventral hooks are much larger than dorsal), the presence of conspicuous spines on the anterior part of the trunk and smaller spines occurring more posteriorly and reaching the extremity of the body, and narrow lemnisci longer than the proboscis receptacle. Features useful to distinguish A. johni from A. megarhynchus (Linstow, 1892) are: 10-13 proboscis hooks in each row, the maximum length of the ventral hooks 77-108 microm, a narrower proboscis with a length/width ratio of 2.16-3.22:1 (mean 2.78:1), an egg length of 87-102 microm, and an unusual form of the posterior extremity of females (the presence of a terminal concavity between two lateral lobes).
基于从亚南极南极鱼科鱼类长柄巴塔哥尼亚南极鱼采集的标本，对约翰氏阿斯佩尔棘头虫（贝利斯，1929年）（棘头虫纲：异棘头虫科）进行了重新描述。宿主在比格尔海峡（麦哲伦次区域）捕获。重新描述纳入了先前未描述或描述不佳的特征以及完整的测量数据。阿斯佩尔棘头虫属的棘头虫在吻部有强烈的背腹不对称武装（腹侧钩比背侧钩大得多），躯干前部有明显的刺，后部有较小的刺并延伸至身体末端，以及比吻部 receptacle 长的狭窄 lemnisci。将约翰氏阿斯佩尔棘头虫与巨吻阿斯佩尔棘头虫（林斯托，1892年）区分开来的有用特征是：每行有10 - 13个吻钩，腹侧钩的最大长度为77 - 108微米，吻部较窄，长宽比为2.16 - 3.22:1（平均2.78:1），卵长为87 - 102微米，以及雌性后肢的不寻常形态（两个侧叶之间有一个末端凹陷）。
