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  • MEDITERRANIC

    on May 13, 2022

    Restoration details: No restoration at all in the specimen. The plate was slightly prepared to try to display the pygidium, which, even though, is not fully visible (a particularly common characteristic from Daguinaspis fossils).

    Dimensions: Specimen: 3,3 x 1,7 cm.

    Weight: circa 20 g.

    Locality: Tazemmourt Section, Northen slope of the Western Anti-Atlas, Morocco.

    Identification and Taxonomy:

    Species: Daguinaspis ambroggii (Hupé & Abadie, 1950); Family: Fallotaspididae; Order: Redlichida; Class: Trilobita.

    Lithostratigraphy: Upper Amouslek Formation (Lower Cambrian, Stage 3).

    Biostratigraphy: Daguinaspis Zone of the Cambrian Fossil Sous Lagerstätte.

    Age: Cambrian, Early Paleozoic Era. 520-515 million years old.

    Collection: #CALPAIS 9062; Collected May 2021.


    Description (main features):

    One typical complete adult internal mould of D. ambroggii, with ca. 3 cm length (see the scale on the photo). On the back of the slab are perfectly observable disperse Brevipelta chouberti, a poorly-known Brachiopod fossil from the Tazemmourt Section. Note the presence, particularly in some thoracic segments, a few pleurae and mainly at glabella, of unstable calcite. In general, the specimen is well preserved, showing almost all the key structures of the species. Very good size for a complete specimen of this species, a notable characteristic.

    Cephalon typical from one big adult individual, heart-shaped, showing one single small facial suture, coincident with the pre-glabellar ridge. Nevertheless, the sutures in general are not clearly visible due to the presence of residual calcite. Glabella and occipital are not observable, as they are (probably) protected by the calcite layer. With the right equipment, it could be a good bet to clean this specimen. The concave pre-glabellar frontal area till the eyes is clearly observable. The prominent ocular lobes, so typical of Daguinaspis, are not eroded, which is rare. They are well marked and elevated from the rest of the Cephalon.

    Complete thorax on right and left lobes. Observable 1st-14th of the 16 thoracic segments. Conspicuous pleurae (especially those of the left lobe), with non-evident pleural spines (not preserved). Well marked axial furrows on the posterior tergites.

    The pygidium is not observable. Despite their small size (known just from a few individuals), Daguinaspis (and other Fallotaspidid) pygidia are surprisingly rare. On the other hand, there is no clear deformation of the exoskeleton of this specimen, which is difficult to get.

    Daguinaspis was among the earliest defined genera of Cambrian trilobites that were based on Moroccan material. (...). It has only been found in the Western Anti-Atlas. The occurrences suggest a strong preference for fine-grained sandstones (Geyer, 1996).

    Consult this and more about the Souss-Lagerstätte specimens at our website.


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    This specimen will be shipped from Portugal.




    SKU: #9062

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