Product Description
This Canadaspis, 3" figure includes hand painted features to give it realistic details that are true to natural anatomy. This figure is considered a museum quality replica. Highest Quality Natural Rubber.
Canadaspis ("Shield of Canada") is an extinct genus of bivalved Cambrian arthropod, known from North America and China. They are thought to have been benthic feeders that moved mainly by walking and possibly used its biramous appendages to stir mud in search of food. They have been placed within the Hymenocarina, which includes other bivalved Cambrian arthropods. The bivalved carapaces of Canadaspis perfecta are typically 8–52 millimetres (0.31–2.05 in) in length, which taper towards the front end. The head had a small pair of eyes borne on short stalks. Between the eyes is a forward pointing spine, as well as a pair of short antennae, which appear to lack segmentation. Similar antennae are known from Waptia, and are probably homologous to the hemi-ellipsoid bodies of crustaceans, and thus likely have an olfactory function. The head also has another pair of larger, segmented antennae, probably with more than 12 segments, the segments increased in length toward the end of the antenna, with the front end of the segments bearing slender, forward-facing spines. The head had a pair of mandibles and maxillae. The mandible bore a mandibular palp, which was fringed with setae, with the mandible having a toothed margin. The head had two pairs of cephalothoracic legs which have prominently developed endites, with the legs ending in a terminal claw. It is unclear whether these limbs were uniramous or biramous. The body had over a dozen segments divided into an anterior thorax with legs, covered by the carapace, and a posterior legless exposed abdomen. The thorax had 8 associated pairs of biramous legs. The limb endopods were segmented, probably with 13-14 segments, and also ended in a terminal claw. The exopods were lobe-shaped, with 9 or 10 rays radiating outwards from their edges. The abdomen terminated with a telson, which bore a pair of spinose projections directed posteriorly on its lower edge, each spinose projection consisted of one large spine and 5 smaller spines.
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