Project 709: J. R. Paterson, D. C. García-Bellido, G. D. Edgecombe. 2012. New Artiopodan Arthropods from the Early Cambrian Emu Bay Shale Konservat-Lagerstätte of South Australia. Journal of Paleontology. 86 (2):340-357.
Abstract
The Emu Bay Shale Konservat-Lagerstätte (Cambrian Series 2, Stage 4) on Kangaroo Island, South Australia, is the source of two new non-biomineralized artiopodan arthropods. Squamacula buckorum n. sp. is the first record outside of China of a genus otherwise known only from its type species, S. clypeata, from the Chengjiang biota. The Australian species displays the long cephalic doublure and spiniform exopod setae that are apomorphic for this genus, provides new information on the alimentary tract and midgut glands (the latter preserved as three-dimensional, permineralized structures), and indicates interspecific variability in trunk segment numbers. The distribution of Squamacula strengthens the biogeographic connections between early Cambrian “Burgess Shale-type” biotas of Australia and South China. Australimicola spriggi n. gen. n. sp. represents a monotypic genus resolved in a cladistic analysis of Cambro-Ordovician artiopodans as most closely related to or within Conciliterga (a clade containing Helmetia, Kuamaia, Kwanyinaspis, Rhombicalvaria, Saperion, Skioldia, and Tegopelte). Compared with other members of this clade from Chengjiang and the Burgess Shale, the new genus is diagnosed by an elongate trunk with 23 thoracic tergites having spatulate pleural tips and a small pygidium possessing a single, elongate pair of pleural spines, with specimens also showing a hypostome attached to an anterior (or prehypostomal) sclerite, antennae, short endopods, an annulated alimentary tract, and a series of three-dimensional, permineralized midgut glands. An alternative relationship between Australimicola and the Early Ordovician–Early Devonian Cheloniellida explains the shared anterior flexure of trunk pleurae but forces dubious homologies in other characters, such as dorsally-articulated furcae versus spines.Read the article »
Project DOI: 10.7934/P709, http://dx.doi.org/10.7934/P709
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 950 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 38 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 86 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:38/0 |
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MorphoBank Project 709
MorphoBank Project 709
- Creation Date:
14 April 2012 - Publication Date:
23 April 2012 - Project views: 39084
- Matrix downloads: 4
Authors' Institutions
- Natural History Museum, London
- University of New England
- Instituto de Geociencias (CSIC-UCM)
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
MorphoBank Curator Project Administrator | 31 | 1 | 1 | 38 | 0 | 0 | 950 (876, 0, 74) | 0 | 0 | 0 | ||||
Maureen Admin Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
John Paterson Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M1626' (31 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Aglaspis Last Modified in 12/05/13 | 7 | 28 | 27 | 0 | 4 | 0 | 0 | 3 |
[2] † Emeraldella Last Modified in 12/05/13 | 0 | 33 | 33 | 0 | 5 | 0 | 0 | 3 |
[3] † Sidneyia Last Modified in 12/05/13 | 1 | 31 | 31 | 0 | 6 | 0 | 0 | 3 |
[4] † Australimicola Last Modified in 12/05/13 | 11 | 27 | 26 | 0 | 1 | 0 | 0 | 3 |
[5] † Buenaspis Last Modified in 12/05/13 | 13 | 25 | 24 | 0 | 1 | 0 | 0 | 3 |
[6] † Cindarella Last Modified in 12/05/13 | 0 | 36 | 36 | 0 | 2 | 0 | 0 | 3 |
[7] † Emucaris Last Modified in 12/05/13 | 10 | 26 | 26 | 0 | 2 | 0 | 0 | 3 |
[8] † Eoredlichia Last Modified in 12/05/13 | 0 | 37 | 37 | 0 | 1 | 0 | 0 | 3 |
[9] † Helmetia Last Modified in 12/05/13 | 6 | 31 | 31 | 0 | 1 | 0 | 0 | 3 |
[10] † Kangacaris Last Modified in 12/05/13 | 9 | 27 | 27 | 0 | 2 | 0 | 0 | 3 |
[11] † Kuamaia Last Modified in 12/05/13 | 3 | 34 | 34 | 0 | 1 | 0 | 0 | 3 |
[12] † Kwanyinaspis Last Modified in 12/05/13 | 7 | 30 | 30 | 0 | 1 | 0 | 0 | 3 |
[13] † Liwia Last Modified in 12/05/13 | 19 | 18 | 18 | 0 | 1 | 0 | 0 | 3 |
[14] † Misszhouia Last Modified in 12/05/13 | 4 | 30 | 30 | 0 | 4 | 0 | 0 | 3 |
[15] † Naraoia compacta Last Modified in 12/05/13 | 5 | 30 | 29 | 0 | 4 | 0 | 0 | 3 |
[16] † Naraoia spinosa Last Modified in 12/05/13 | 4 | 30 | 30 | 0 | 4 | 0 | 0 | 3 |
[17] † Olenoides Last Modified in 12/05/13 | 1 | 36 | 36 | 0 | 1 | 0 | 0 | 3 |
[18] † Panlongia Last Modified in 12/05/13 | 11 | 28 | 26 | 0 | 1 | 0 | 0 | 3 |
[19] † Phytophilaspis Last Modified in 12/05/13 | 15 | 21 | 21 | 0 | 2 | 0 | 0 | 3 |
[20] † Pygmaclypeatus Last Modified in 12/05/13 | 10 | 27 | 27 | 0 | 1 | 0 | 0 | 3 |
[21] † Retifacies Last Modified in 12/05/13 | 1 | 35 | 35 | 0 | 2 | 0 | 0 | 3 |
[22] † Saperion Last Modified in 12/05/13 | 7 | 26 | 26 | 0 | 5 | 0 | 0 | 3 |
[23] † Sinoburius Last Modified in 12/05/13 | 8 | 29 | 29 | 0 | 1 | 0 | 0 | 3 |
[24] † Siriocaris Last Modified in 12/05/13 | 11 | 25 | 24 | 0 | 3 | 0 | 0 | 3 |
[25] † Skioldia Last Modified in 12/05/13 | 14 | 19 | 19 | 0 | 5 | 0 | 0 | 3 |
[26] † Soomaspis Last Modified in 12/05/13 | 14 | 24 | 23 | 0 | 1 | 0 | 0 | 3 |
[27] † Squamacula clypeata Last Modified in 12/05/13 | 1 | 33 | 33 | 0 | 4 | 0 | 0 | 3 |
[28] † Squamacula buckorum Last Modified in 12/05/13 | 17 | 21 | 21 | 0 | 0 | 0 | 0 | 3 |
[29] † Tariccoia Last Modified in 12/05/13 | 14 | 24 | 23 | 0 | 1 | 0 | 0 | 3 |
[30] † Tegopelte Last Modified in 12/05/13 | 14 | 19 | 19 | 0 | 5 | 0 | 0 | 3 |
[31] † Xandarella Last Modified in 12/05/13 | 0 | 36 | 36 | 0 | 2 | 0 | 0 | 3 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 39084 | |
Project overview | 4754 | |
Media views | 6370 | Media search (5532 views); M107297 (838 views); |
Taxon list | 19015 | |
Specimen list | 3228 | |
Matrix views | 2524 | Matrix landing page (2188 views); New Artiopodan Arthropods from the Early Cambrian Emu Bay Shale Konservat-Lagerstätte of South Australia (336 views); |
Documents list | 1923 | |
Bibliography | 1270 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 361 | |
Matrix downloads | 4 | New Artiopodan Arthropods from the Early Cambrian Emu Bay Shale Konservat-Lagerstätte of South Australia (4 downloads); |
Project downloads | 357 |