Project 4286: C. Zhang, Y. Liu, J. Ortega-Hernández, J. M. Wolfe, C. Jin, H. Mai, X. Hou, J. Guo, D. Zhai. 2023. Three-dimensional morphology of the biramous appendages in Isoxys from the early Cambrian of South China, and its implications for early euarthropod evolution. Proceedings of the Royal Society B: Biological Sciences. 290 (1997):null.
Abstract
Early euarthropod evolution involved a major transition from lobopodian-like taxa to organisms featuring a segmented, well-sclerotized trunk (arthrodization) and limbs (arthropodization). However, the precise origin of a completely arthrodized trunk and arthropodized ventral biramous appendages remain controversial, as well as the early onset of anterior–posterior limb differentiation in stem-group euarthropods. New fossil material and micro-computed tomography inform the detailed morphology of the arthropodized biramous appendages in the carapace-bearing euarthropod Isoxys curvirostratus from the early Cambrian Chengjiang biota. In addition to well-developed grasping frontal appendages, I. curvirostratus possesses two batches of morphologically and functionally distinct biramous limbs. The first batch consists of four pairs of short cephalic appendages with robust endites with a feeding function, whereas the second batch has more elongate trunk appendages for locomotion. Critically, our new material shows that the trunk of I. curvirostratus was not arthrodized. The results of our phylogenetic analyses recover isoxyids as some of the earliest branching sclerotized euarthropods, and strengthens the hypothesis that arthropodized biramous appendages evolved before full body arthrodization.Read the article »
Article DOI: 10.1098/rspb.2023.0335
Project DOI: 10.7934/P4286, http://dx.doi.org/10.7934/P4286
This project contains | Matrices |
---|---|
Download Project SDD File | Total scored cells: 6916 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 135 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 311 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:135/0 |
Currently Viewing:
MorphoBank Project 4286
MorphoBank Project 4286
- Creation Date:
23 June 2022 - Publication Date:
19 April 2023 - Project views: 3098
- Media downloads: 1
- Matrix downloads: 9
This research
supported by
Authors' Institutions
- Harvard University
- Yunnan University
- Chengjiang Fossil Site World Heritage
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Jo Wolfe Project Administrator | 63 | 1 | 1 | 135 | 0 | 0 | 6916 (2941, 0, 3975) | 0 | 0 | 0 | ||||
Javier Ortega-Hernández Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M28815' (63 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] Tubiluchus troglodytes Last Modified in 06/23/22 | 0 | 24 | 24 | 0 | 111 | 0 | 0 | 2 |
[2] † Cricocosmia jinningensis Last Modified in 06/23/22 | 12 | 25 | 25 | 0 | 98 | 0 | 0 | 2 |
[3] † Megadictyon haikouensis Last Modified in 06/23/22 | 27 | 35 | 35 | 0 | 73 | 0 | 0 | 2 |
[4] † Jianshanopodia decora Last Modified in 06/23/22 | 25 | 36 | 36 | 0 | 74 | 0 | 0 | 2 |
[5] † Hadranax augustus Last Modified in 06/23/22 | 55 | 24 | 24 | 0 | 56 | 0 | 0 | 2 |
[6] † Kerygmachela kierkegaardi Last Modified in 06/23/22 | 11 | 64 | 64 | 0 | 60 | 0 | 0 | 2 |
[7] † Pambdelurion whittingtoni Last Modified in 06/23/22 | 24 | 49 | 49 | 0 | 62 | 0 | 0 | 2 |
[8] † Utaurora comosa Last Modified in 06/23/22 | 48 | 31 | 31 | 0 | 56 | 0 | 0 | 2 |
[9] † Opabinia regalis Last Modified in 06/23/22 | 24 | 54 | 54 | 0 | 57 | 0 | 0 | 2 |
[10] † Aegirocassis benmoulae Last Modified in 06/23/22 | 33 | 68 | 68 | 0 | 34 | 0 | 0 | 2 |
[11] † Buccaspinea cooperi Last Modified in 06/23/22 | 49 | 58 | 58 | 0 | 28 | 0 | 0 | 2 |
[12] † Cambroraster falcatus Last Modified in 06/23/22 | 17 | 84 | 84 | 0 | 34 | 0 | 0 | 2 |
[13] † Hurdia triangulata Last Modified in 06/23/22 | 17 | 87 | 87 | 0 | 31 | 0 | 0 | 2 |
[14] † Hurdia victoria Last Modified in 06/23/22 | 17 | 87 | 87 | 0 | 31 | 0 | 0 | 2 |
[15] † Peytoia nathorsti Last Modified in 06/23/22 | 23 | 77 | 77 | 0 | 35 | 0 | 0 | 2 |
[16] † Schinderhannes bartelsi Last Modified in 06/23/22 | 79 | 47 | 47 | 0 | 9 | 0 | 0 | 2 |
[17] † Amplectobelua symbrachiata Last Modified in 06/23/22 | 25 | 78 | 78 | 0 | 32 | 0 | 0 | 2 |
[18] † Lyrarapax unguispinus Last Modified in 06/23/22 | 17 | 83 | 83 | 0 | 35 | 0 | 0 | 2 |
[19] † Anomalocaris canadensis Last Modified in 06/23/22 | 14 | 86 | 86 | 0 | 35 | 0 | 0 | 2 |
[20] † Houcaris saron Last Modified in 06/23/22 | 17 | 83 | 83 | 0 | 35 | 0 | 0 | 2 |
[21] † Parapeytoia yunnanensis Last Modified in 06/23/22 | 78 | 34 | 33 | 0 | 23 | 0 | 0 | 2 |
[22] † Erratus sperare Last Modified in 06/23/22 | 44 | 23 | 23 | 0 | 68 | 0 | 0 | 2 |
[23] † Isoxys acutangulus Last Modified in 06/23/22 | 52 | 27 | 26 | 0 | 56 | 0 | 0 | 2 |
[24] † Isoxys auritus Last Modified in 06/23/22 | 60 | 24 | 24 | 0 | 51 | 0 | 0 | 2 |
[25] † Isoxys curvirostratus Last Modified in 06/23/22 | 30 | 37 | 37 | 0 | 68 | 0 | 0 | 2 |
[26] † Isoxys volucris Last Modified in 06/23/22 | 75 | 17 | 17 | 0 | 43 | 0 | 0 | 2 |
[27] † Surusicaris elegans Last Modified in 06/23/22 | 60 | 22 | 21 | 0 | 53 | 0 | 0 | 2 |
[28] † Kylinxia zhangi Last Modified in 06/23/22 | 26 | 30 | 30 | 0 | 79 | 0 | 0 | 2 |
[29] † Fuxianhuia xiaoshibaensis Last Modified in 06/23/22 | 10 | 46 | 46 | 0 | 79 | 0 | 0 | 2 |
[30] † Chengjiangocaris kunmingensis Last Modified in 06/23/22 | 10 | 46 | 46 | 0 | 79 | 0 | 0 | 2 |
[31] † Leanchoilia superlata Last Modified in 06/23/22 | 15 | 37 | 36 | 0 | 84 | 0 | 0 | 2 |
[32] † Alalcomenaeus sp Last Modified in 06/23/22 | 7 | 43 | 43 | 0 | 85 | 0 | 0 | 2 |
[33] † Misszhouia longicaudata Last Modified in 06/23/22 | 14 | 42 | 42 | 0 | 79 | 0 | 0 | 2 |
[34] † Kuamaia lata Last Modified in 06/23/22 | 14 | 42 | 42 | 0 | 79 | 0 | 0 | 2 |
[35] Limulus polyphemus Last Modified in 06/23/22 | 1 | 48 | 48 | 0 | 86 | 0 | 0 | 2 |
[36] Triops cancriformis Last Modified in 06/23/22 | 1 | 54 | 54 | 0 | 80 | 0 | 0 | 2 |
[37] † Aysheaia pedunculata Last Modified in 06/23/22 | 14 | 44 | 44 | 0 | 77 | 0 | 0 | 2 |
[38] † Onychodictyon ferox Last Modified in 06/23/22 | 14 | 53 | 53 | 0 | 68 | 0 | 0 | 2 |
[39] † Onychodictyon gracilis Last Modified in 06/23/22 | 24 | 41 | 41 | 0 | 70 | 0 | 0 | 2 |
[40] † Diania cactiformis Last Modified in 06/23/22 | 20 | 42 | 42 | 0 | 73 | 0 | 0 | 2 |
[41] † Xenusion auerswaldae Last Modified in 06/23/22 | 31 | 33 | 33 | 0 | 71 | 0 | 0 | 2 |
[42] † Paucipodia inermis Last Modified in 06/23/22 | 16 | 37 | 37 | 0 | 82 | 0 | 0 | 2 |
[43] † Microdictyon sinicum Last Modified in 06/23/22 | 14 | 46 | 46 | 0 | 75 | 0 | 0 | 2 |
[44] † Cardiodictyon catenulum Last Modified in 06/23/22 | 22 | 44 | 44 | 0 | 69 | 0 | 0 | 2 |
[45] † Hallucigenia sparsa Last Modified in 06/23/22 | 19 | 42 | 42 | 0 | 74 | 0 | 0 | 2 |
[46] † Hallucigenia fortis Last Modified in 06/23/22 | 17 | 47 | 47 | 0 | 71 | 0 | 0 | 2 |
[47] † Hallucigenia hongmeia Last Modified in 06/23/22 | 46 | 31 | 31 | 0 | 58 | 0 | 0 | 2 |
[48] † Luolishania longicruris Last Modified in 06/23/22 | 17 | 52 | 52 | 0 | 66 | 0 | 0 | 2 |
[49] † Collinsium ciliosum Last Modified in 06/23/22 | 14 | 53 | 53 | 0 | 68 | 0 | 0 | 2 |
[50] † Collinsovermis monstruosus Last Modified in 06/23/22 | 54 | 27 | 27 | 0 | 54 | 0 | 0 | 2 |
[51] † Collins monster emu bay Last Modified in 06/23/22 | 48 | 36 | 36 | 0 | 51 | 0 | 0 | 2 |
[52] † Acinocricus stichus Last Modified in 06/23/22 | 55 | 29 | 29 | 0 | 51 | 0 | 0 | 2 |
[53] † Orstenotubulus evamuellerae Last Modified in 06/23/22 | 66 | 17 | 17 | 0 | 52 | 0 | 0 | 2 |
[54] † Antennacanthopodia gracilis Last Modified in 06/23/22 | 29 | 29 | 29 | 0 | 77 | 0 | 0 | 2 |
[55] † Tertiapatus dominicanus Last Modified in 06/23/22 | 28 | 31 | 31 | 0 | 76 | 0 | 0 | 2 |
[56] Euperipatoides sp Last Modified in 06/23/22 | 0 | 55 | 55 | 0 | 80 | 0 | 0 | 2 |
[57] Metaperipatus blainvillei Last Modified in 06/23/22 | 1 | 55 | 55 | 0 | 79 | 0 | 0 | 2 |
[58] Epiperipatus biolleyi Last Modified in 06/23/22 | 1 | 55 | 55 | 0 | 79 | 0 | 0 | 2 |
[59] Batillipes pennaki Last Modified in 06/23/22 | 3 | 56 | 56 | 0 | 76 | 0 | 0 | 2 |
[60] Echiniscus testudo Last Modified in 06/23/22 | 2 | 61 | 61 | 0 | 72 | 0 | 0 | 2 |
[61] Actinarctus doryphorus Last Modified in 06/23/22 | 4 | 59 | 59 | 0 | 72 | 0 | 0 | 2 |
[62] Macrobiotus cf. harmsworthi Last Modified in 06/23/22 | 0 | 57 | 57 | 0 | 78 | 0 | 0 | 2 |
[63] Hypsibius dujardini Last Modified in 06/23/22 | 0 | 57 | 57 | 0 | 78 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 3098 | |
Project overview | 376 | |
Media views | 594 | Media search (504 views); M861440 (90 views); |
Matrix views | 203 | Matrix landing page (192 views); Isoxys phylogeny (10 views); Matrix Nexus format (1 view); |
Bibliography | 115 | |
Views for media list | 180 | |
Specimen list | 316 | |
Taxon list | 1312 | |
Documents list | 2 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 21 | |
Media downloads | 1 | M861440 (1 download); |
Project downloads | 11 | |
Matrix downloads | 9 | Isoxys phylogeny (9 downloads); |