Hernández-Orts Jesús Servando, Alama-Bermejo Gema, Alberto Crespo Enrique, Anibal García Néstor, Antonio Raga Juan, Esteban Montero Francisco
Cavanilles Institute of Biodiversity and Evolutionary Biology, Science Park, University of Valencia, C/ Catedritico José Beltrán 2, 46980, Paterna, Valencia, Spain.
Folia Parasitol (Praha). 2012 Dec;59(4):264-71. doi: 10.14411/fp.2012.037.
Breizacanthus aznari sp. n. is described from the banded cusk-eel Raneya brasiliensis (Kaup) (Ophidiiformes: Ophidiidae) from the Patagonian coast in Argentina. Breizacanthus Golvan, 1969 is currently composed of five species (including the new species) and is characterised by the absence of trunk spines; a short cylindrical proboscis with two types of hooks and lemnisci longer than the proboscis receptacle. Breizacanthus aznari is clearly distinguished from B. chabaudi Golvan, 1969 by having 12 longitudinal rows of hooks on the proboscis, instead of 16-18. The new species resembles B. golvani Gaevskaya et Shukhgalter, 1984, B. irenae Golvan, 1969, and B. ligur Paggi, Orecchia et Della Seta, 1975, all possessing 12 longitudinal rows of hooks. However, B. aznari differs from B. golvani in having 4-5 large hooks per row (vs. 8-9) and larger eggs. The new species can be distinguished from B. irenae by the shorter body size of females, the different range of numbers of large hooks of males (4-5 and 5-6, respectively), the smaller maximum number of small hooks of females (3 and 4, respectively), and the shorter lemnisci. Breizacanthus aznari differs from B. ligur by the smaller body length of females, the smaller maximum body length of males, the different range of numbers of large hooks of males (4-5 and 5-6, respectively), and smaller lemnisci. This is the first record of a species of Breizacanthus from fishes of the order Ophidiiformes and from the Southern Hemisphere. Comparative data on species of Euzetacanthus Golvan et Houlin, 1964 and Breizacanthus are also provided.
新种阿兹纳里布氏棘头虫（Breizacanthus aznari sp. n.）是从阿根廷巴塔哥尼亚海岸的带状鼬鳚鱼（Raneya brasiliensis (Kaup)）（鼬鳚目：鼬鳚科）中描述的。1969年的布氏棘头虫属（Breizacanthus Golvan）目前由五个物种（包括新物种）组成，其特征是没有躯干棘；有一个短圆柱形吻，带有两种类型的钩，且系带比吻囊长。阿兹纳里布氏棘头虫与1969年的沙氏布氏棘头虫（B. chabaudi Golvan）明显不同，其吻上有12排纵向的钩，而不是16 - 18排。新物种与1984年的戈尔瓦尼布氏棘头虫（B. golvani Gaevskaya et Shukhgalter）、1969年的伊雷娜布氏棘头虫（B. irenae Golvan）以及1975年的利古里亚布氏棘头虫（B. ligur Paggi, Orecchia et Della Seta）相似，它们都有12排纵向的钩。然而，阿兹纳里布氏棘头虫与戈尔瓦尼布氏棘头虫的区别在于每行有4 - 5个大钩（而不是8 - 9个）且卵更大。新物种与伊雷娜布氏棘头虫的区别在于雌性身体尺寸较短，雄性大钩数量范围不同（分别为4 - 5个和5 - 6个），雌性小钩最大数量不同（分别为3个和4个），以及系带较短。阿兹纳里布氏棘头虫与利古里亚布氏棘头虫的区别在于雌性体长较小，雄性最大体长较小，雄性大钩数量范围不同（分别为4 - 5个和5 - 6个），以及系带较小。这是布氏棘头虫属物种在鼬鳚目鱼类以及南半球的首次记录。还提供了1964年的尤泽塔棘头虫属（Euzetacanthus Golvan et Houlin）和布氏棘头虫属物种的比较数据。
