Xystridura

Xystridura Temporal range: Middle Cambrian
Xystridura templetonensis (Chapman, 1929). Middle Cambrian (early Templetonian), Beetle Creek Formation, Beetle Creek, Mount Isa, Queensland, Australia. Length of exoskeleton = 28 mm (sag.)
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	† Artiopoda
Class:	† Trilobita
Order:	† Redlichiida
Family:	† Xystriduridae
Genus:	† Xystridura Whitehouse, 1936 [1]
Synonyms
MilesiaChapman, 1929 (non Latreille, 1804) InosacotesÖpik, 1975 PolydinotesÖpik, 1975,

Xystridura is a genus of redlichiid trilobite described originally from the Middle Cambrian (Miaolingian) strata of Queensland, Australia. The genus ranges upwards from Ordian into Florian Stages in terms of Australian Cambrian stratigraphic nomenclature.

Type species

Milesia templetonensis Chapman, 1929, p. 214. ^[2] [synonymized with Bathyuriscus saint-smithi Chapman, 1929, p. 209, by Whitehouse, 1939, p. 199] - see Palmer and Gatehouse (1972, p. D13). ^[3] Also = X. conspicabilis (Chapman, 1929), X. elegans (Chapman, 1929), X. nitida (Chapman, 1929) and X. olenelloides (Chapman, 1929) [fide Whitehouse (1939), Öpik (1975)], all Middle Cambrian, Queensland (Edgecombe, 2004). ^[4]

Other species

• Xystridura glacia Palmer and Gatehouse, 1972. Xystridura glacia faunule (early Middle Cambrian), boulder from moraine, Mount Spann, NE Argentina Range, Antarctica.
• Xystridura multilinia Palmer and Gatehouse, 1972. Xystridura multilinia faunule (early Middle Cambrian), boulder from moraine, Mount Spann, NE Argentina Range, Antarctica.
• Xystridura filifera Öpik, 1975. ^[5] [= Xystridura verticosa Öpik, 1975 & X. triligata Öpik, 1975].
• Xystridura altera Öpik, 1979. From Northern Territory Geological Survey Diamond Drill Hole Elkedra No. 3., southwestern Georgina Basin, Northern Territory. Middle Cambrian, Arthur Creek Formation, Xystridura altera assemblage and probably equating to part of the Triplagnostus gibbus Biozone in terms of Scandinavian biostratigraphic terminology (Laurie, 2004, p. 225). ^[6]
• Xystridura oepiki Laurie, 2006 (p. 192, figs. 62 - 64). From the Arthur Creek Formation, Florian Stage (Laurie, 2012, p.3). ^[7] Pacific Oil & Gas Baldwin 1 well, southern Georgina Basin, Northern Territory. ^[8]
• Xystridura jielingensis Yang et al., 1993. Type locality is Gaoqiaogou, bed 46, which is in a Taijangian/Wangcunian slope lime mudstone in the Baguamiao Formation of China. ^[9]

Many other species of Xystridura described by Chapman (1929) and Öpik (1975) were listed by Edgecombe (2004).

References

1. WHITEHOUSE, F. W., 1936. The Cambrian faunas of northeastern Australia; Part 1, Stratigraphical outline; Part 2, Trilobita (Miomera): Queensland Mus. Mem., v. 11, pt. 1, p. 59 - 112.
2. CHAPMAN, F., 1929. On some trilobites and brachiopods from the Mount Isa District, N.W. Queensland: Victoria, [Australia] Royal Soc. Proc., v. 41, pt. 2, p. 206 - 216.
3. PALMER, A. R. and GATEHOUSE, C. G. 1972. Early and Middle Cambrian Trilobites From Antarctica. Contributions to the geology of Antarctica. Geological Survey professional Paper, 456-D, 37 pp., 6 pls.
4. EDGECOMBE, G. D. 2004. Australian Trilobites: A Species List and Bibliography. Australian Museum online. https://web.archive.org/web/20060710034024/http://www.austmus.gov.au/palaeontology/research/trilobites03.htm
5. ÖPIK, A. A., 1975. Templetonian and Ordian Xystridurid trilobites of Australia. Bureau of Mineral Resources, Geology and Geophysics, Bulletin 121, 84 pp.
6. LAURIE, J. R., 2004. Early Middle Cambrian trilobite faunas from NTGS Elkedra 3 corehole, southern Georgina Basin, Northern Territory. Memoirs of the Association of Australasian Palaeontologists30: 221 - 260.
7. LAURIE, J. R., 2012. Biostratigraphy of the Arthur Creek Formation and Thorntonia Limestone, Georgina Basin. ResearchGate Article - https://www.researchgate.net/publication/236858748.
8. LAURIE, J. R., 2006. Early Middle Cambrian trilobites from Pacific Oil & Gas Baldwin 1 well, southern Georgina Basin, Northern Territory. Memoirs of the Association of Australasian Palaeontologists32, 127 - 204. ISSN 0810-8889. https://www.researchgate.net/publication/236858375
9. YANG, J., YU, S., LIU, G., SU, N., HE, M., SHANG, M., ZHANG, H., ZHU, H., LI, Y. and YAN, G. 1993. Cambrian stratigraphy, lithofacies, paleogeography and trilobite faunas of East Qinling-Dabashan Mountains, China. 1 - 246.

• Fossils (Smithsonian Handbooks) by David Ward (Page 58)
• Xystridura in the Paleobiology Database