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Alternative names: Mitrocystites styloideus or Dalejocystis styloideus. Taxonomy from Mindat.org. Description (Südkamp 2017, p. 98): "The theca is roughly semicircular. It consists of two large thin plates on the oral surface, which nearly completely overlap the dorsal surface. The margin in the neighbourhood of the aulacophore is sometimes arcuate and bears medially the slender insertion of the aulacophore. Next to it, on the oral surface, short transverse riblets can be seen, which are directed to the aulacophore. The lateral margins of the dorsal surface bear a row of knots. The elongate aulacophore bears spines, which taper to the end. The anterior large ossicle (stylocone) has the appearance of a buttercup. At the other edge of the body a strong spine is attached, but is missing in most species." Name derivation: Stylos = pillar. Identified by oilshale. References: Dehm, R. 1934. Untersuchungen an Cystoideen des rheinischen Unterdevons. Sitzungsberichte der Mathematisch-Naturwissenschaftlichen Abteilung der Bayerischen Akademie der Wissenschaften zu München für 1934: 19-43. Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.

Chotecops is the most abundant trilobite in the Hunsrück Slate and due to the excellent preservation, often soft tissue such as antennae and legs have been preserved as a thin sheet of pyrite.

Synonyms of Urasterella asperula are Protasteracanthion primus and Roemeraster asperula. Taxonomy from Fossilworks.org. Description from Südkamp 2017, p. 127: "Urasterella is the most common asteroid in the Hunsrück Slate. The small disc is composed of a hexagonal central plate surrounded by five hexagonal radial plates, and a further ring of small plates. The small mouth is built of only triangular flat plates. The dorsal surface of the round narrow arms is composed of at least three rows of plates (radials, adradials and inferomarginals; the last were pushed upwards). All plates of the dorsal side bear paxillae with spines. The plates of the oral surface are arranged in two double-sided rows (ambulacrals ans adambulacrals). Mostly, only the large disc-shaped adambulacrals can be recognized, as the opposing subrectangular ambulacrals can only be seen by the wide-opened arm furrow. The adambulacrals bear a transverse ridge carrying long spines." Name derivation: Ur = old, Aster = star. Identified by oilshale. References: Roemer, C. F. (1864) Neue Asteriden und Crinoiden aus devonischem Dachschiefer von Bundenbach bei Birkenfeld. Palaeontographica 9:143-152 Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.

Chotecops is the most abundant trilobite in the Hunsrück Slate and due to the excellent preservation, often soft tissue such as antennae and legs have been preserved as a thin sheet of pyrite.

Loriolaster was a slow-moving low-level epifaunal detritivore-suspension feeder. Taxonomy from Fossilworks.org. Description from Südkamp 2017, p. 132: " Loriolaster is related to Cheiropteraster and differs by the following features. The smooth skin forms a wide U-shaped area between the arms. The mouth frame consists of the mouth angle plates together with only the enlarged second ambulacrals. Loriolaster has wide ambulacrals and spoon like laterals. Their margin bears three rather short spines as well as one larger spine." Loriolaster mirabilis is more common than the more slender Loriolaster gracilis. Identified by oilshale. References: Lehmann. W.M. (1957) Die Asterozoen in den Dachschiefern des rheinischen Unterdevons. Abhandlungen des Hessischen Landesamtes für Bodenforschung 21:1-160. Südkamp, W. (2017): Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2. Bartels, Christoph et al. (1997) Schatzkammer Dachschiefer: Die Lebenswelt des Hunsrückschiefer-Meeres. Mainz/Bochum (Landessammlung für Naturkunde Rheinland-Pfalz und Deutsches Bergbau-Museum Bochum).

The old name for this very common Ophiuroid is Taeniaster beneckei. Taxonomy from Fossilworks.org. Description from Südkamp 2017, p. 135: "The mouth-angle plates are slender and abut to form a characteristic V-shape. The disc is constructed of oval-shaped scale-like plates held together by a reticulated pattern of granular skin. The interradial margin is concave or rounded and lacks marginal plates. The proximal ambulacral furrow is broad. The five arms taper evenly into long whip-like tips. A finely granular skin covers the dorsal surface of the arms. The ambulacrals are alternating, unfused and boot-shaped. The foot is only slightly longer than the top of the boot. The laterals are crescent shaped and ear-like. They bear up to five groove spines and five evenly tapering vertical spines, the oral-most one is the longest. The vertical spines decrease in length distally along the arms. Identified by oilshale. References: Stürtz, B. (1886) Beitrag zur Kenntnis paläozoische Seesterne. Palaeontographica 32:75-98. Südkamp, W. (2017): Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.