Falloaster anquiroisitus new genus new species (Asterozoa, Echinodermata) is described from the Floian (Early Ordovician) Garden City Formation of Idaho. The new taxon is known from a single small specimen. Because of weathering, remaining disk elements are incomplete. Dorsal surfaces of the ambulacral ossicles of two arms are available, one well preserved, whereas those of a third arm expose the ambulacrals essentially as they would appear in ventral view. Ambulacral ossicles were all but entirely lost on the remaining two arms.Albeit asterozoan, F. anquiroisitus is not assignable at the class level. It is suggestive of the Asteroidea in presence of a domal disk, five abruptly tapering triangular, arched arms, and ambulacral ossicles vaulted to form a furrow. Ambulacral morphology, including the presence of very large podial pores, is unlike that of early asteroids. In addition, no adambulacral or other virgal-series derivatives are present; ambital framework ossicles are absent; a single series of enlarged, plate-like arm ossicles, one series on each side of the arm, come together at the arm midline; and the plate-like series were supported laterally by recurved ambulacral margins. Only remnants of the disk near the periphery survive, these of overall expression unlike any other echinoderm, including asterozoans. The mouth frame is unknown. Falloaster anquiroisitus is argued to represent an extinct lineage apart from the four recognized asterozoan classes, thereby joining a limited number of other problematic early Asterozoa.UUID: http://zoobank.org/a13a5417-44b6-4ac3-90cf-9dc8fb5902bd

中文翻译：

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有问题的类水平亲缘关系的早期奥陶纪（弗洛伊安）星形动物（棘皮动物）

鹌鹑新属新种（Asterozoa, Echinodermata）描述于爱达荷州的弗洛伊安（早奥陶世）花园城市组。新的分类单元是从一个小标本中得知的。由于风化，剩余的磁盘元素是不完整的。两臂的小骨背侧可用，其中一个保存完好，而第三臂的背侧表面基本上暴露了小骨，就像它们在腹侧视图中出现的一样。剩下的两条手臂几乎完全失去了步行听小骨。尽管是天体动物，F. anquiroisitus不能在班级级别分配。它暗示小行星有一个圆盘、五个突然变细的三角形、拱形臂和拱形形成沟的小骨。Ambulacral 形态，包括非常大的足底孔的存在，与早期小行星不同。此外，不存在 adambulacral 或其他 virgal 系列衍生物；无双骨框架听小骨；一系列扩大的、板状的手臂听小骨，在手臂的每一侧，在手臂中线汇合；并且板状系列由弯曲的边缘边缘横向支撑。只有外围附近的圆盘残留物幸存下来，这些整体表现不同于任何其他棘皮动物，包括星形动物。口框​​未知。鹌鹑被认为代表了除了四个公认的星形动物类别之外的一个灭绝谱系，从而加入了数量有限的其他有问题的早期 Asterozoa.UUID：http://zoobank.org/a13a5417-44b6-4ac3-90cf-9dc8fb5902bd