Pygmaclypeatus daziensis, a unique lower Cambrian arthropod with two different compound eye systems.

ABSTRACT: More than half a billion years ago, a high diversity of organisms appeared in the fossil record. All major clades we know today already existed, and arthropods dominated the marine faunas. Many were already equipped with a pair of elaborated compound eyes on top of movable eye stalks. Some of them also possessed 3-4 small single-aperture eyes, so-called median eyes. Just trilobites possessed sessile dorsal eyes. One pair of compound eyes/lateral eyes is considered plesiomorphic and is a common trait for euarthropods. Here, we describe an arthropod that possessed two independent compound eye systems-a pair of stalked and a pair of tiny sessile dorsal trilobite-like compound eyes, unique in the arthropod kingdom so far. A competition between prey and predators for the capacity of vision trig

SUBMITTER: Schmidt M 

PROVIDER: S-EPMC11865447 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature