Garbin Lucas E, Diaz Julia I, Cremonte Florencia, Navone Graciela T
Centro de Estudios Parasitológicos y de Vectores, La Plata, Argentina.
J Parasitol. 2008 Aug;94(4):852-9. doi: 10.1645/GE-1369.1.
The anisakid species Contracaecum chubutensis n. sp. was found parasitizing the imperial cormorant Phalacrocorax atriceps at 2 different localities, Bahía Bustamante (45 degrees 11'S, 66 degrees 30'W) and Puerto Madryn (42 degrees 47'S, 65 degrees 02'W) on the Patagonian coast. Morphometrical analysis and further studies of adult specimens of C. chubutensis n. sp. and fourth-stage larvae of Contracaecum sp. were done using light and scanning electron microscopy. The possession and disposition of 7 pairs of tail papillae differentiate this new species from C. osculatum, C. radiatum, C. plagiaticium, and C. mirounga. Double-sized spicules separate it from C. variegatum and C. pelagicum. Moreover, the paracloacal papillae disposition and tail shape differentiate this new species from C. travassosi. The presence of bifurcated interlabia separate it from C. ogmorhini and C. margolisi. Three well-marked lip notches, a sharp tail shape, and the of the transversal paracloacal papillae disposition distinguishes C. chubutensis n. sp. from C. magnipapillatum and C. septentrionale. The species here described can be differentiated from C. caballeroi by its bifurcated interlabia, longer spicules, and for possessing more precloacal papillae pairs. It can be separated from C. rudolphii by a thinner interlabia at the base, deeper lip notches, a sharper tail, the disposition of transversal paracloacal papillae, and greater distance between both papillae of the first subventral distal papillae pair. In addition, fourth-stage larvae recovered from the same host and localities were identified and described as Contracaecum sp. Prevalence of adult parasites was 66.7 %, mean intensity was 4.0, and mean abundance was 7.1.
异尖线虫新物种丘布特对盲囊线虫（Contracaecum chubutensis n. sp.）被发现寄生于巴塔哥尼亚海岸两个不同地点——布斯塔曼特湾（南纬45度11分，西经66度30分）和马德林港（南纬42度47分，西经65度02分）的帝企鹅鸬鹚（Phalacrocorax atriceps）体内。利用光学显微镜和扫描电子显微镜对丘布特对盲囊线虫新物种的成虫标本以及对盲囊线虫属第四期幼虫进行了形态测量分析和进一步研究。7对尾乳突的存在和分布使该新物种与奥氏对盲囊线虫（C. osculatum）、辐射对盲囊线虫（C. radiatum）、斜形对盲囊线虫（C. plagiaticium）和海象对盲囊线虫（C. mirounga）区分开来。双尺寸交合刺使其与杂色对盲囊线虫（C. variegatum）和远洋对盲囊线虫（C. pelagicum）区分开来。此外，泄殖腔旁乳突的分布和尾部形状使该新物种与特拉瓦索对盲囊线虫（C. travassosi）区分开来。阴唇分叉的存在使其与奥氏对盲囊线虫（C. ogmorhini）和马尔戈利西对盲囊线虫（C. margolisi）区分开来。三个明显的唇凹、尖锐的尾部形状以及横向泄殖腔旁乳突的分布使丘布特对盲囊线虫新物种与大乳头对盲囊线虫（C. magnipapillatum）和北方对盲囊线虫（C. septentrionale）区分开来。这里描述的物种因其阴唇分叉、交合刺更长以及拥有更多的泄殖腔前乳突对而与卡瓦列罗对盲囊线虫（C. caballeroi）区分开来。它可以通过基部阴唇更薄、唇凹更深、尾部更尖锐以及横向泄殖腔旁乳突的分布和第一对腹侧远端乳突的两个乳突之间更大的距离与鲁道夫对盲囊线虫（C. rudolphii）区分开来。此外，从同一宿主和地点采集到的第四期幼虫被鉴定并描述为对盲囊线虫属。成虫寄生虫的感染率为66.7%，平均感染强度为4.0，平均丰度为7.1。
