New records of Lower Devonian terrestrial arachnids (Arachnida: Phalangiotarbia, Trigonotarbida) from the Ardenno-Rhenish Mountains (West-Eifel/Germany and Luxembourg)

The first phalangiotarbid arachnid from Waxweiler and the first trigonotarbid arachnid from Luxembourg are recorded and described. The fossils could be determined as Devonotarbus cf. hombachensis and Alkenia mirabilis, respectively. This expands the known geographical distribution of these rare Devonian terrestrial arachnids. Furthermore, some previously unknown anatomical details of Devonotarbus are figured and briefly described, namely leg podomeres and their dense cover with hair-like structures.