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A taxonomic revision of the Early Devonian dalmanitid trilobite Kasachstania Maksimova, 1972 from central Kazakhstan
Journal of Paleontology ( IF 1.3 ) Pub Date : 2020-01-14 , DOI: 10.1017/jpa.2019.108
Enrique A. Randolfe , Juan José Rustán , Arnaud Bignon

The dalmanitid trilobite Kasachstania Maksimova, 1972, previously reported from the Lower Devonian of Kazakhstan and North America (USA) and the upper Silurian–Lower Devonian of South America (Bolivia and Argentina), is revised. Kasachstania kasachstanica (Balashova in Maksimova,1968) and K. septicostata (Maksimova, 1968) are regarded as junior synonyms of the type species K. saryarkensis (Maksimova, 1960), all from the Lower Devonian of the type locality in central Kazakhstan (northern Balkhash). On the basis of a new diagnosis, K. ulrichi ulrichi (Delo, 1940) from the Emsian of the United States, K. ulrichi asiatica (Maksimova, 1968), K. pristina (Maksimova, 1968), and K. alperovichi Pour et al., 2019, from the Lower Devonian of Kazakhstan, K. andii (Kozłowski, 1923) from the upper Silurian–Lower Devonian of Bolivia, and K. gerardoi Edgecombe and Ramsköld, 1994, from the upper Silurian–Lower Devonian of Bolivia and Argentina are excluded from Kasachstania. This genus, represented only by K. saryarkensis and K. kiikbaica (Maksimova, 1968), is restricted to the Lower Devonian of central Kazakhstan, corresponding to the Balkhash–Mongolo–Okhotsk province in the paleobiogeographic context of the Old World Realm, instead of being nearly cosmopolitan as previously considered. In addition, we provide some remarks about Saryarkella Maksimova, 1978b, a monospecific dalmanitid genus largely overlooked although valid from the Emsian of the same area in central Kazakhstan.

中文翻译:

1972年来自哈萨克斯坦中部的早泥盆纪斑纹三叶虫Kasachstania Maksimova的分类修订

斑纹三叶虫哈萨克斯坦Maksimova,1972 年,先前报道的哈萨克斯坦和北美洲(美国)下泥盆统和南美洲(玻利维亚和阿根廷)的上志留统-下泥盆统(玻利维亚和阿根廷),已进行了修订。卡萨斯坦尼亚(Balashova 在 Maksimova,1968 年)和K. septicstata(Maksimova, 1968) 被认为是模式种的初级同义词K. saryarkensis(Maksimova, 1960),均来自哈萨克斯坦中部(巴尔喀什北部)典型产地的下泥盆统。在新诊断的基础上,K. ulrichi ulrichi(Delo,1940)来自美国的 Emsian,K. ulrichi asiatica(马克西莫娃,1968),K.普里什蒂纳(马克西莫娃,1968 年),以及K.阿尔佩罗维奇Pour 等人,2019 年,来自哈萨克斯坦下泥盆统,K. andii(Kozłowski, 1923) 来自玻利维亚的上志留统-下泥盆统,以及K. gerardoiEdgecombe 和 Ramsköld,1994 年,来自玻利维亚和阿根廷的上志留统-下泥盆统被排除在外哈萨克斯坦. 该属仅由K. saryarkensisK. kiikbaica(Maksimova, 1968),仅限于哈萨克斯坦中部的下泥盆统,对应于旧世界领域古生物地理背景下的巴尔喀什-蒙古-鄂霍次克省,而不是像以前认为的那样几乎是世界性的。此外,我们提供一些关于萨里亚凯拉Maksimova, 1978b, 一种单种斑纹斑黍属,虽然在哈萨克斯坦中部同一地区的 Emsian 中有效,但在很大程度上被忽视了。
更新日期:2020-01-14
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