Bundenbach Taxocrinus stuertzii
12 cm (fossil), 20×26 cm (matrix)
Bundenbach; Obereschenbach pit
Aesthetic sea lily on a large, unbroken plate, rich in detail.
Taxocrinus stuertzii – The flexible giant of the Hunsrück slate
Unique in its class: a triumph of evolution among crinoids.
In a world full of rigid armor, this species is a sensation. As the only prominent representative of the Flexibilia subclass in the Hunsrück Shale, it shatters the usual image of Devonian crinoids. Where others relied on rigid shells, Taxocrinus opted for flexibility – a strategy that makes it one of the most fascinating collector’s items ever.
The exclusive characteristics – what makes Taxocrinus stuertzii so special:
- The Wonder of Flexibility: The most distinctive feature is the connection between the calyx and the arms. Unlike in almost all other species, the lower segments of the arms are not rigidly attached to the calyx. They remain movable, which lends the fossil an incomparably vivid, organic dynamism even within the rock.
- The “Curved” Crown: The arms of this genus follow an impressive structural plan: they fork dichotomously a total of four times. After the third bifurcation, something unique occurs: the arm tips become strikingly thin and curve protectively over the calyx—an elegant image of perfect symmetry.
- Purism without pinnulae: Unlike many other crinoids, this animal lacks pinnulae (lateral branches). This absence of “filler material” directs the viewer’s focus entirely to the powerful, clear structure of the main arms.
- A world-class handle: The dimensions of the handle are also record-breaking. It can reach a length of up to one meter and is exceptionally strong. A particular highlight for specialists are the sometimes long, forked cirrus (holding appendages), which give the stem additional complexity.
A milestone for systematics from Bundenbach
Anyone wishing to document the diversity of crinoids cannot overlook Taxocrinus stuertzii. It represents a completely unique evolutionary path. Its soft, flexible structure means that it is often preserved in shale in particularly aesthetic, almost “dancing” poses.
A specimen for Bundenbach collectors seeking something truly special. Its rarity as the sole representative of the Flexibilia and the sheer size of its stalk make it an undisputed star. A piece of Earth’s history that shows adaptability was already the key to success 400 million years ago.
