Lyrarapax

Lyrarapax is a radiodont of the family Amplectobeluidae that lived in the early Cambrian period 520 million years ago. Its neural tissue indicates that the anomalocaridid frontal appendage is protocerebral, resolving parts of the arthropod head problem and showing that the frontal appendage is homologous to the antennae of Onychophorans and labrum of euarthropods.[1] Its fossilized remains were found in Yunnan in southwestern China. A second species was described in 2016, differing principally in the morphology of its frontal appendages.[2]

Lyrarapax
Temporal range: Chengjiang Biota, Cambrian Period
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: †Dinocaridida
Order: †Radiodonta
Clade: †Amplectobeluidae
Genus: †Lyrarapax
Cong et al., 2014[1]
Type species
Lyrarapax unguispinus
Cong et al., 2014
Species
  • L. unguispinus Cong et al., 2014[1]
  • L. trilobus Cong et al., 2016 [2]

References
  1. Peiyun Cong; Xiaoya Ma; Xianguang Hou; Gregory D. Edgecombe; Nicholas J. Strausfeld (2014). "Brain structure resolves the segmental affinity of anomalocaridid appendages". Nature. 513 (7519): 538–42. doi:10.1038/nature13486. PMID 25043032.
  2. Cong, Peiyun; Daley, Allison C.; Edgecombe, Gregory D.; Hou, Xianguang; Chen, Ailin (2016). "Morphology of the radiodontan Lyrarapax from the early Cambrian Chengjiang biota". Journal of Paleontology: 1. doi:10.1017/jpa.2016.67.
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