Two new Brazilian species of Chelodesmidae of the genera Iguazus and Tessarithys (Diplopoda: Polydesmida)

ABSTRACT Two new species of Chelodesmidae from the Brazilian northeast are described, Iguazus robustus sp. nov., from the state of Paraíba, and Tessarithys exacuminatus sp. nov., from the states of Pernambuco and Sergipe. Iguazus robustus sp. nov. differs from other species of the genus by having a constriction in the zone of the gonopodal acropodite tip and an extra branch at the tip of the acropodite. Tessarithys exacuminatus sp. nov. differs from the other species of the genus by the large and ascending subterminal dorsal branch of the prefemoral process of the gonopod. Brief reviews of the taxonomy, geographic distribution and a key for males of the respective genera are provided.

摘要：记述了产自巴西东北部的锉马陆科（Chelodesmidae）2新种，分别为采自帕拉伊巴州的粗壮伊瓜苏马陆（Iguazus robustus sp. nov.），以及采自伯南布哥州与塞尔希培州的尖尾泰萨里马陆（Tessarithys exacuminatus sp. nov.）。粗壮伊瓜苏马陆新种与该属其余物种的区别在于：其生殖肢（gonopod）的端肢节（acropodite）顶端区域具缢缩结构，且端肢节顶端带有额外分支。尖尾泰萨里马陆新种与该属其余物种的区别在于：其生殖肢前股突（prefemoral process）具大型且向上延伸的亚端背分支。文中还分别对两个属的分类学、地理分布及雄性检索表进行了简要评述。