Anoria tontoensis Walcott, 1924

Foster, John R., 2022, Continuous character variation within the Glossopleura-Anoria-Sonoraspis plexus: Dolichometopid trilobites from the Cadiz Formation (Cambrian: Miaolingian, Wuliuan), California, Palaeontologia Electronica (a 18) 25 (2), pp. 1-25 : 19

Anoria tontoensis Walcott, 1924

Figure 11F

Dolichometopus tontoensis Walcott, 1916a, p. 373 , pl. 51, figs. 1, 1a–1h.

Anoria tontoensis (Walcott, 1916a) Walcott, 1924, p. 54 , p. 54, pl. 9, fig. 2.

“ Anoria” tontoensis Foster, 2011b, p. 107 –110. figs. 5, 6.

Type specimens. USNM 62685 , lectotype, part and counterpart of a complete specimen ; USNM 62686 , paralectotype, nearly complete specimen .

Occurrence. Bright Angel Formation, Grand Canyon, Arizona; Glossopleura Assemblage Biozone , possibly Glossopleura walcotti Interval Biozone (Morgan, 2021) if identification of G. walcotti in same beds (Foster, 2011b) is correct, (Wuliuan, Miaolingian).

Material examined. USNM 62685, USNM 62686, GRCA 2797, GRCA 11520, GRCA 123303, GRCA 123304, DMNH EPI.42917.

Remarks. This is the type and only clearly valid species of Anoria studied in this report; previously reported specimens of other Anoria species from the Cadiz Formation are confirmed as belonging within Glossopleura .

Figures

FIGURE 11. Some representative dolichometopids from other formations included in this study. A–B and D–E) Glossopleura boccar. C) Glossopleura similaris(?) F) Anoria tontoensis. G–H) Glossopleura mohavensis. A) USNM 62703, type of Glossopleura boccar, from the Stephen Formation. B) USNM 62702, specimen originally assigned to G. stephenensis, from the Stephen Formation. C) KUMIP 314054, G. similaris(?), from the Spence Shale (Langston Formation). D) SGDS 1975, G. boccar, from the Chisholm Formation. E) USNM 62714, specimen originally assigned to G. mckeei, from the Bright Angel Formation. F) USNM 62685, Anoria tontoensis, from the Bright Angel Formation. G) LACMIP 10782, specimen originally assigned to “Sonoraspis nelsoni”, from the Monola Formation. H) LACMIP 2469/24444.1, specimen originally assigned to “Sonoraspis californica”, from the Pole Canyon Formation. (Image in D courtesy of Andrew R.C. Milner. G and H courtesy LACM: Hendy, A., Walker, L., Mertz, W. [2020]. LACM Invertebrate Paleontology. Version 1.9. Natural History Museum of Los Angeles County. Occurrence dataset https://doi.org/ 10.15468/6nxzen accessed via GBIF.org on 2021-03-23.) All scale bars equal 1 cm.