The Early Ordovician (late Tremadocian; Stairsian) trilobite Gonioteloides Kobayashi has long been known from a small number of pygidia assigned to a single formally named species, and its affinities have not been assessed. Silicified material from western Utah and southeastern Idaho includes six distinct species assigned to the genus, one of which is the type species. Two others (G. moffitti and G. pankowskii) are new and formally named. An additional three species that are clearly new but known from sparse material are described in open nomenclature. Gonioteloides has a stratigraphic distribution through five consecutive trilobite zones in the mid-Stairsian Stage (upper Tremadocian). Although exoskeletal morphology of three species is almost completely known, the phylogenetic affinity of the taxon remains difficult to determine. It is tentatively assigned to Dimeropygidae Hupé.UUID: http://zoobank.org/23257d6c-262b-4ef5-ae4e-cc431777e67e

中文翻译：

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早奥陶世（晚 Tremadocian；Stairsian）三叶虫 Gonioteloides Kobayashi 的系统学，物种来自美国西部的大盆地

早奥陶世（晚Tremadocian；Stairsian）三叶虫角球菌属长期以来，小林从分配给一个正式命名的物种的少量侏儒中得知，其亲缘关系尚未评估。来自犹他州西部和爱达荷州东南部的硅化物质包括分配给该属的六种不同的物种，其中一种是模式物种。另外两个（G.莫菲蒂和G.潘科夫斯基) 是新的并正式命名。在开放命名法中描述了另外三个明显是新的但从稀疏材料中已知的物种。角球菌属在阶梯期中期（上Tremadocian）具有通过五个连续三叶虫带的地层分布。虽然三个物种的外骨骼形态几乎是完全已知的，但该分类群的系统发育亲和性仍然难以确定。它暂时分配给 Dimeropygidae Hupé.UUID：http://zoobank.org/23257d6c-262b-4ef5-ae4e-cc431777e67e