Amarixys gracilis (Petrunkevitch, 1945)


Original combination: Curculioides gracilis

PALAEOZOIC: Upper Carboniferous


Taxonomic references

Curculioides gracilis

Petrunkevitch, 1945a: 68–70, fig. 34, plate II figs 8–10 original description
Petrunkevitch, 1949: 287
Petrunkevitch, 1953: 114
Petrunkevitch, 1955a: 160, figs 116(2a–b)
Langford, 1963: 65, figs 101–103 (not figs 104–105) (not seen)
Brauckmann, 1987b: 99, fig. 6
Brauckmann, 1991: 47, fig. 20

Amarixys gracilis (Petrunkevitch):

Selden, 1992: 619–621, figs 4d, 20a–b, 21b–c
Selden, 1993b: 306
Harvey, 2003c: 184
Whalen and Selden, 2021: 7, fig. 2

Distribution table
US (Illinois)
Type locality: Mazon Creek, Grundy County, Illinois, U.S.A. (Upper Carboniferous).


Locality Lat Lon
1 Mazon Creek 41.316666 -88.35
Type repository
  • Holotype (Illinois State Museum)
Zoobank LSID


Brauckmann, C. (1987b). Neue Arachniden (Ricinuleida, Trigonotarbida) aus dem Namurium B von Hagen-Vorhalle (Ober-Karbon; West-Deutschland). Dortmunder Beiträge zur Landeskunde, Naturwissenschaftliche Mitteilungen 21: 97–109. -- Show included taxa

Brauckmann, C. (1991). Arachniden und Insekten aus dem Namurian von Hagen-Vorhalle (Ober-Karbon; West-Deutschland). Veroffentlichungen aus Fuhlrott-Museum 1: 1–275. -- Show included taxa

Harvey, M.S. (2003c). Catalogue of the smaller arachnid orders of the world: Amblypygi, Uropygi, Schizomida, Palpigradi, Ricinulei and Solifugae. CSIRO Publishing, Melbourne. -- Show included taxa

Langford, G. (1963). The Wilmington coal fauna and additions to the Wilmington coal flora from a Pennsylvanian deposit in Will County, Illinois. Esconi Associates, Illinois. [2nd edition] -- Show included taxa

Petrunkevitch, A. (1945a). Palaeozoic Arachnida. An inquiry into their evolutionary trends. Scientific Papers, Illinois State Museum 3(2): 1–76. -- Show included taxa

Petrunkevitch, A. (1949). A study of Palaeozoic Arachnida. Transactions of the Connecticut Academy of Arts and Sciences 37: 69–315. -- Show included taxa

Petrunkevitch, A. (1953). Paleozoic and Mesozoic Arachnida of Europe. Memoirs of the Geological Society of America 53: i–xi, 1–128. -- Show included taxa

Petrunkevitch, A. (1955a). Arachnida. In: Moore, R.C. (ed.) Treatise on invertebrate paleontology. P, Arthropoda University of Kansas Press, Lawrence 2: 42–162. -- Show included taxa

Selden, P.A. (1992). Revision of the fossil ricinuleids. Transactions of the Royal Society of Edinburgh, Earth Sciences 83: 595–634. -- Show included taxa

Selden, P.A. (1993b). Arthropoda (Aglaspidida, Pycnogonida and Chelicerata). In: Benton, M.J. (ed.) The fossil record 2 Chapman and Hall, London: 297–320. -- Show included taxa

Whalen, N. & Selden, P. (2021). A new, giant ricinuleid (Arachnida, Ricinulei), from the Pennsylvanian of Illinois, and the identification of a new, ontogenetically stable, diagnostic character. Journal of Paleontology 95(3): 601-612. doi: -- Show included taxa

Date Type Reference Old value
2022-06-13 New taxonomic reference entry Whalen and Selden, 2021