RodrÍguez William David, Navarrete-Heredia JosÉ L, Arriaga-Varela Emmanuel, Cuccodoro Giulio
Entomología, Centro de Estudios en Zoología, CUCBA, Universidad de Guadalajara, ApartadoPostal 134, 45100 Zapopan, Jalisco, México..
Zootaxa. 2020 May 15;4778(3):zootaxa.4778.3.8. doi: 10.11646/zootaxa.4778.3.8.
Two new species of Megarthrus are described from cloud forests of the Mexican state of Veracruz: M. cavianae Rodríguez, Navarrete-Heredia Arriaga-Varela sp. nov., and Chiapas: M. chiapas Cuccodoro sp. nov. They differ from the two hitherto known Mexican species M. altivagans Bernhauer, 1929, and M. alatorreorum Rodríguez Navarrete-Heredia, 2015, both from temperate forests of the Transmexican Volcanic Belt, by having synapomorphic features of the M. inaequalis-supergroup of species. This lineage includes all the Central and South American members of the genus, with the inclusion of these species, the distribution of the group is extend by more than 5 degree of latitude to the North. Within this lineage, the two new species share a very peculiar morphology of the male abdominal sternite VIII found elsewhere in the genus only in M. flavosignatus Bierig, 1940, and M. zunilensis Sharp, 1887, with which they form the M. zunilensis-group of species defined here.
卡维阿内巨节蚁Rodríguez, Navarrete-Heredia Arriaga-Varela新种，以及来自恰帕斯州的：恰帕斯巨节蚁Cuccodoro新种。它们与迄今已知的两种墨西哥物种——1929年描述的高地巨节蚁Bernhauer和2015年描述的阿氏巨节蚁Rodríguez Navarrete-Heredia（均来自跨墨西哥火山带的温带森林）不同，具有不等巨节蚁物种超组的共衍征特征。该谱系包括该属所有中美洲和南美洲成员，随着这些物种的加入，该类群的分布向北延伸了超过5个纬度。在这个谱系中，这两个新物种共享一种非常独特的雄性腹部第八腹节形态，这种形态在该属中仅在1940年描述的黄纹巨节蚁Bierig和1887年描述的苏尼尔巨节蚁Sharp中发现，它们共同构成了这里定义的苏尼尔巨节蚁物种组。
