Lanfranchi Ana L, Timi Juan T
Laboratorio de Parasitología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Funes 3350, 7600 Mar del Plata, Argentina.
J Parasitol. 2011 Feb;97(1):111-5. doi: 10.1645/GE-2507.1. Epub 2010 Sep 22.
A new species of arhythmacanthid acanthocephalan, Heterosentis martini n. sp., parasitic in the Argentinean sandperch Pseudopercis semifasciata (Cuvier) (Perciformes, Pinguipedidae) from the coasts of Argentina is described. Heterosentis martini n. sp. differs from all congeneric species by having 10 longitudinal rows of hooks in the proboscis, each with 7-8 hooks, consisting of 1 medium apical and 3 larger sub-apical hooks with root, and 3-4 smaller, basal, curved hooks with rudimentary roots and spines in both ventral and dorsal regions of the body. The most similar species, Heterosentis heteracanthus (Linstow, 1896) Van Cleave, 1931, and Heterosentis brasiliensis Vieira, Felizardo and Luque, 2009, also have 10 longitudinal rows of hooks, but H. heteracanthus differs from the new species by having only 3-5 (more frequently 4) hooks in each row, with only the anterior hook large and bearing a developed root. Heterosentis brasiliensis differs from the new species by possessing 2 sub-apical hooks in each row (instead of 3), similar body length but shorter proboscis, and trunk spines restricted to the ventral surface of body.
描述了一种新的无节律棘头虫，马丁异棘吻虫（Heterosentis martini n. sp.），它寄生于来自阿根廷海岸的阿根廷拟鲈（Pseudopercis semifasciata (Cuvier)）（鲈形目，拟雀鲷科）体内。马丁异棘吻虫与所有同属物种的区别在于，其吻部有10排纵向的钩，每排有7 - 8个钩，由1个中等大小的顶端钩和3个较大的近顶端带根钩以及3 - 4个较小的、基部弯曲的带退化根和刺的钩组成，在身体的腹面和背面区域均有。最相似的物种，赫氏异棘吻虫（Heterosentis heteracanthus (Linstow, 1896) Van Cleave, 1931）和巴西异棘吻虫（Heterosentis brasiliensis Vieira, Felizardo and Luque, 2009）也有10排纵向的钩，但赫氏异棘吻虫与新物种的区别在于每排只有3 - 5个（更常见为4个）钩，只有前钩大且有发育良好的根。巴西异棘吻虫与新物种的区别在于每排有2个近顶端钩（而非3个），体长相似但吻部较短，且躯干棘仅限于身体腹面。
