Gabreyaspididae
Gabreyaspididae Temporal range: Early Devonian
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Reconstruction of Gabreyaspis | |
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Phylum: | Chordata |
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Family: | Gabreyaspididae
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Gabreyaspididae is a
Gabreyaspidids differ from the amphiaspidoid amphiaspids of Amphiaspididae primarily due to ornamentation unique to each family,[1] and differs from amphiaspidoid amphiaspids of Olbiaspididae in that gabreyaspidids' mouths are ventrally positioned, whereas the mouths of olbiaspidids are positioned anteriorly.
Taxonomy
Gabreyaspis
Gabreyaspis tarda is the type species of the family, and is known from several mostly complete cephalothoracic armors. It has a woodgrain-like ornamentation over its armor, with several tesserae-like units, especially around the head-region.
Prosarctaspis
Prosarctaspis taimyrica has a broad, flat, half-circle-shaped armor that looks vaguely like a horseshoe crab.
Pelaspis
Pelaspis teres differs from other gabreyaspidids in its unique ornamentation, the shape of its cephalothoracic armor, which is oval-circular, and suggestive of a pizza or a cookie, and its apparent lack of a dorsal spine.
Tareyaspis
Tareyaspis venusta is similar in size and dimensions to Pelaspis, but differs in ornamentation, and the shape of the posterior region of the cephalothoracic armor, which, in T. venusta, has a dorsal spine.
References