Hernández-Orts Jesús S, Pinacho-Pinacho Carlos D, García-Varela Martín, Kostadinova Aneta
Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 3000, Ciudad Universitaria, CP, 04510, Distrito Federal, México.
Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic.
Parasitol Res. 2016 Feb;115(2):547-59. doi: 10.1007/s00436-015-4771-x. Epub 2015 Oct 10.
M aritrema corai n. sp. is described based on material from the intestine of the white ibis Eudocimus albus (L.) (Threskiornithidae) in Mexico. The new species can be distinguished morphologically from all congeners by the unique combination of the following morphological features: a very long cirrus sac attenuated distally [cirrus sac to body length ratio 1:0.90-1.29 (mean 1:1.07)]; a large, elongate-oval seminal receptacle, located dorsally between the cirrus sac and ovary; and long, filiform, unarmed, evaginable cirrus. Phylogenetic analyses of 28S ribosomal DNA (rDNA) sequences for the new species and for Maritrema spp. and Microphallus spp. depicted strong support for the two genera (excluding Microphallus fusiformis) and revealed close relationships between Ma. corai n. sp. and the clade formed by Maritrema novaezealandense Martorelli, Fredensborg, Mouritsen & Poulin, 2004, Maritrema heardi (Kinsella & Deblock, 1994) and Maritrema cf. eroliae.
科氏海睾吸虫新种（Maritrema corai n. sp.）是根据采自墨西哥白鹮（Eudocimus albus (L.)，鹮科）肠道的标本描述的。该新种在形态上可通过以下独特的形态特征组合与所有同属物种区分开来：一个非常长且向远端逐渐变细的阴茎囊[阴茎囊与体长之比为1:0.90 - 1.29（平均1:1.07）]；一个大的、长椭圆形的受精囊，位于阴茎囊和卵巢之间的背侧；以及长的、丝状的、无武装的、可外翻的阴茎。对新种以及海睾吸虫属（Maritrema spp.）和微睾吸虫属（Microphallus spp.）的28S核糖体DNA（rDNA）序列进行的系统发育分析，有力支持了这两个属（不包括梭形微睾吸虫Microphallus fusiformis），并揭示了科氏海睾吸虫新种与由新西兰海睾吸虫（Maritrema novaezealandense Martorelli, Fredensborg, Mouritsen & Poulin, 2004）、赫氏海睾吸虫（Maritrema heardi (Kinsella & Deblock, 1994)）和疑似埃氏海睾吸虫（Maritrema cf. eroliae）组成的进化枝之间的密切关系。
