Biology:Cardiodictyon
| Cardiodictyon | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| (unranked): | Panarthropoda |
| Phylum: | †"Lobopodia" |
| Class: | †Xenusia |
| Order: | †Archonychophora |
| Family: | †Cardiodictyidae |
| Genus: | †Cardiodictyon Hou, Ramsköld, and Bergström, 1991 |
| Type species | |
| Cardiodictyon catenulum Hou, Ramsköld, and Bergström, 1991
| |
Cardiodictyon is a genus of lobopodian known from 518 millions years old Chengjiang Lagerstätte. 525 millions years old partial fossil is also reported.[1] It has ~25 pairs of legs, each associated with a pair of dorsal plates.
Each leg terminates in a pair of claws.[2] It may or may not have a head shield,[3] though it certainly has an expanded head.[4]
In 2022, a 518 million years old specimen of C. catenulum was researched and shown an unsegmented head and a brain composed of three separate cephalic parts.[1] However, although "three parts" in this study means prosocerebrum, protocerebrum and deutocerebrum,[1] it is different from earlier studies that referred protocerebrum, deutocerebrum and tritocerebrum as tripartite brain of arthropod, and treated posocerebrum as part of protocerebrum.[5][6]
References
- ↑ 1.0 1.1 1.2 Strausfield, Nicholas J.; Hou, Xianguang; Sayre, Marcel E.; Hirth, Frank (24 November 2022). "The lower Cambrian lobopodian Cardiodictyon resolves the origin of euarthropod brains". Science 378 (6622): 905–909. doi:10.1126/science.abn6264. PMID 36423269. Bibcode: 2022Sci...378..905S. https://www.science.org/doi/10.1126/science.abn6264. Retrieved 2 December 2022.
- ↑ Ramsköld, L., & Chen, J.-Y. (1998). Cambrian Lobopodians: Morphology and Phylogeny. In Arthropod fossils and phylogeny (pp. 107–150). New York: Columbia University Press. ISBN:978-0231096546
- ↑ Bergstrom, J.; Hou, X. (2001). "Cambrian Onychophora or Xenusians". Zoologischer Anzeiger 240 (3–4): 237–245. doi:10.1078/0044-5231-00031.
- ↑ Jianni Liu; Jason A. Dunlop (15 March 2014). "Cambrian lobopodians: A review of recent progress in our understanding of their morphology and evolution". Palaeogeography, Palaeoclimatology, Palaeoecology 398: 4–15. doi:10.1016/j.palaeo.2013.06.008. Bibcode: 2014PPP...398....4L.
- ↑ Lan, Tian; Zhao, Yuanlong; Zhao, Fangchen; He, You; Martinez, Pedro; Strausfeld, Nicholas J. (2021-10-11). "Leanchoiliidae reveals the ancestral organization of the stem euarthropod brain" (in English). Current Biology 31 (19): 4397–4404.e2. doi:10.1016/j.cub.2021.07.048. ISSN 0960-9822. PMID 34416180.
- ↑ Lev, Oren; Edgecombe, Gregory D; Chipman, Ariel D (2022). "Serial Homology and Segment Identity in the Arthropod Head". Integrative Organismal Biology 4 (1): obac015. doi:10.1093/iob/obac015. ISSN 2517-4843. PMID 35620450. PMC 9128542. http://dx.doi.org/10.1093/iob/obac015.
Wikidata ☰ Q16852076 entry
 |  |
