2012
DOI: 10.1038/ncomms2272
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Cambrian lobopodians and extant onychophorans provide new insights into early cephalization in Panarthropoda

Abstract: Cambrian lobopodians are important for understanding the evolution of arthropods, but despite their soft-bodied preservation, the organization of the cephalic region remains obscure. Here we describe new material of the early Cambrian lobopodian Onychodictyon ferox from southern China, which reveals hitherto unknown head structures. These include a proboscis with a terminal mouth, an anterior arcuate sclerite, a pair of ocellus-like eyes and branched, antenniform appendages associated with this ocular segment.… Show more

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Cited by 64 publications
(90 citation statements)
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References 53 publications
(117 reference statements)
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“…An alternative position for O. ferox in stem-Euarthropoda was also recovered, but only at exceedingly low concavity values. Total-group Euarthropoda includes various disparate forms united by the ancestral presence of fused protocerebral appendages bearing series of spines/spinules, ultimately transformed into the euarthropod labrum 9,20 (Supplementary Note 2, transformation series [12][13][14][15][16][17]. The gradual evolutionary transition from lobopodians with spinose frontal appendages (Jianshanopodia, Megadictyon) through gilled lobopodians (Kerygmachela, Pambdelurion, Opabinia) and anomalocaridid-type taxa (Peytoia, Anomalocaris, Hurdia) to stem euarthropods with full body arthrodization (for example, fuxianhuiids) is in overall agreement with previous reports 5,11,14,20 .…”
Section: Research Lettermentioning
confidence: 99%
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“…An alternative position for O. ferox in stem-Euarthropoda was also recovered, but only at exceedingly low concavity values. Total-group Euarthropoda includes various disparate forms united by the ancestral presence of fused protocerebral appendages bearing series of spines/spinules, ultimately transformed into the euarthropod labrum 9,20 (Supplementary Note 2, transformation series [12][13][14][15][16][17]. The gradual evolutionary transition from lobopodians with spinose frontal appendages (Jianshanopodia, Megadictyon) through gilled lobopodians (Kerygmachela, Pambdelurion, Opabinia) and anomalocaridid-type taxa (Peytoia, Anomalocaris, Hurdia) to stem euarthropods with full body arthrodization (for example, fuxianhuiids) is in overall agreement with previous reports 5,11,14,20 .…”
Section: Research Lettermentioning
confidence: 99%
“…The Palaeozoic form-taxon Lobopodia encompasses a diverse range of soft-bodied 'legged worms' known from exceptional fossil deposits [1][2][3][4][5][6][7][8][9] . Although lobopodians occupy a deep phylogenetic position within Panarthropoda, a shortage of derived characters obscures their evolutionary relationships with extant phyla (Onychophora, Tardigrada and Euarthropoda) 2,3,5,[10][11][12][13][14][15] .…”
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confidence: 99%
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