Reasonably well preserved rhinocaridid archaeostracan phyllocarids from the late Emsian Heckelmann Mill Lagerstätte in the Lahn Syncline are described and figured. For comparison, the holotype specimen of Nahecaris lata is re-figured along with a new specimen assigned here to Nahecaris cf. frankei. The Heckelmann Mill specimens clearly fit the concept of the genus Nahecaris, but differ slightly from previously established species. A new species, Nahecaris sabineae sp. nov., is thus proposed and constitutes one of the stratigraphically youngest records of the genus. The genus Nahecaris is more speciose in the Rhenish Early Devonian than previously recognized, and probably has a worldwide distribution.

描述并标出了Lahn Syncline中晚期Emsian Heckelmann MillLagerstätte的合理保存良好的鼻窦古生菌的叶状生物。为了进行比较，将Nahecaris lata的整型标本与此处分配给Nahecaris cf的新标本一起重新设计。弗兰基。Heckelmann Mill的标本显然符合Nahecaris属的概念，但与以前建立的物种略有不同。一个新种，Nahecaris sabineae sp。因此，Nov。被提出，并且构成该属的地层上最年轻的记录之一。Nahecaris属 它在Rhenish早期泥盆纪时期比以前认为的更为特殊，并且可能在全球范围内分布。