Hernández-Mena David Iván, Mendoza-Garfias Berenit, Ornelas-García Claudia Patricia, Pérez-Ponce de León Gerardo
Laboratorio de Helmintología, Instituto de Biología, Universidad Nacional Autónoma de México, Mexico, DF, Mexico.
Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Mexico, DF, Mexico.
Syst Parasitol. 2016 Jul;93(6):525-38. doi: 10.1007/s11230-016-9645-9. Epub 2016 Jun 15.
The systematic position of two genera of Macroderoididae McMullen, 1937, Perezitrema Baruš & Moravec, 1967 and Magnivitellinum Kloss, 1966 is reviewed based on a phylogenetic analysis of the interrelationships of 15 species of the family allocated into six genera, along with 44 species of plagiorchioid trematodes, using partial sequences of the 28S rRNA gene. Sequences were analysed through parsimony, maximum likelihood and Bayesian inference. The obtained topologies show Perezitrema as the sister taxon of three species of Macroderoides Pearse, 1924; the latter genus appears to be paraphyletic since another three species are not included in this group. Instead, Magnivitellinum was placed as the sister taxon of Alloglossidium Simer, 1929. These relationships are well supported by high bootstrap and posterior probability values. The resulting trees demonstrate that the family Macroderoididae, as currently conceived in taxonomic treatments, is not monophyletic. Magnivitellinum simplex Kloss, 1966 and Alloglossidium spp. were nested as sister taxa of members of the family Leptophallidae Dayal, 1938, whereas Perezitrema bychowskii Baruš & Moravec, 1967 and species of Macroderoides and Paramacroderoides Venard, 1941 were grouped with Auridistomum chelydrae (Stafford, 1900), a monotypic member of Auridistomidae Stunkard, 1924. Based on our results, a new family, Alloglossidiidae n. fam. was established to accommodate the genera Magnivitellinum and Alloglossidium.
基于对分属于六个属的该科15个物种以及44种斜睾吸虫的系统发育关系分析，利用28S rRNA基因的部分序列，对1937年麦克马伦建立的巨盘科（Macroderoididae）中的两个属，即1967年巴鲁什和莫拉维茨建立的佩雷吸虫属（Perezitrema）以及1966年克洛斯建立的巨卵黄吸虫属（Magnivitellinum）的系统位置进行了综述。通过简约法、最大似然法和贝叶斯推断对序列进行了分析。所得拓扑结构显示，佩雷吸虫属是1924年皮尔西建立的巨盘吸虫属（Macroderoides）三个物种的姐妹分类单元；后一个属似乎是并系的，因为另外三个物种未包含在该类群中。相反，巨卵黄吸虫属被置于1929年西默建立的异舌吸虫属（Alloglossidium）的姐妹分类单元位置。这些关系得到了高自展值和后验概率值的有力支持。所得树状图表明，分类处理中目前所认为的巨盘科不是单系的。1966年克洛斯描述的简单巨卵黄吸虫（Magnivitellinum simplex）和异舌吸虫属的物种嵌套在1938年达亚尔建立的细睾科（Leptophallidae）成员的姐妹分类单元位置，而1967年巴鲁什和莫拉维茨描述的比氏佩雷吸虫（Perezitrema bychowskii）以及巨盘吸虫属和1941年韦纳德建立的副巨盘吸虫属（Paramacroderoides）的物种则与1924年斯顿卡德建立的单型科——螯龟金腹科（Auridistomidae）的螯龟金腹吸虫（Auridistomum chelydrae，斯塔福德，1900）归为一类。基于我们的研究结果，建立了一个新科——异舌吸虫科（Alloglossidiidae n. fam.），以容纳巨卵黄吸虫属和异舌吸虫属。
