AbstractBased on external structural features and on those of male and female genitalia, the monobasic carabid genusChalteniagen.nov. is described and illustrated, along withChaltenia patagonicasp.nov. A parsimony analysis of tribe-level taxa supports a position of this new genus within the supertribe TrecFhitae. Based on the analysis of fittest trees, the genusChalteniais most closely related to the tribe Zolini. Several characters, such as head with three supraorbital setae, two rows of squamosetae on ventral surface of male protarsomeres 1–2, elytral interval 8 not carinate, and glossal sclerite quadrisetose, differentiate the genusChalteniafrom the three subtribes of Zolini. Because of the large degree of difference from the previously known genera of Zolini, a new monogeneric subtribe, Chalteniina, is described in order to hold the new genusChaltenia. The biogeographical pattern exhibited by the tribe Zolini is congruent with the biogeographical patterns of other carabids, such as the tribe Broscini, that show an amphitropical distribution.
摘要根据外部结构特征和雌雄生殖器的特征,描述并说明了单基干角雉属Chalteniagen.nov.以及Chaltenia patagonicasp.nov.。对族级类群的解析分析支持将这一新属归入超族 TrecFhitae。根据最合适树分析,Chaltenia 属与 Zolini 族的亲缘关系最为密切。一些特征,如头部有三条眶上刚毛、雄性原跗节 1-2 的腹面有两排鳞片、第 8 背板间隙无刻纹、光泽硬片呈四角形等,使 Chaltenia 属与 Zolini 的三个亚族区分开来。由于与之前已知的 Zolini 属差别很大,因此描述了一个新的单属亚族 Chalteniina,以容纳新属 Chaltenia。Zolini 科所表现出的
生物地理格局与其他腕足动物(如 Broscini 科)的
生物地理格局一致,后者表现出两栖分布。