SUPPLEMENTARY ONLINE MATERIAL Systematic palaeontology Olenellus gilberti Meek in White, 1874 Synonymy. 1874 Olenellus Gilberti Meek in White: 7-8 1875 Olenus (Olenellus) Gilberti (Meek in White); Gilbert: ?181 [as Olenus gilberti, from Oquirrh Range], 182-183 1877 Olenellus Gilberti Meek in White; White (part): 44-46, pl. 2, figs. 3a-c only [?not pl. 2, figs. d, e = indeterminate thoracic segments] 1879 Olenellus Gilberti Meek in White; Brögger: 45 [mentioned] 1883 Olenellus Gilberti Meek in White; Hague: 256, 257 [mentioned] 1884 Olenellus Gilberti Meek in White; Walcott (part): 2, 29, 34, 38, 268, pl. 21, fig. 14 only [not pp. 36, 37; not pl. 9, fig. 16 = Olenellus nevadensis (Walcott, 1910), following Walcott 1910; not pl. 9, fig. 16a = olenellid sp. indet., note that this specimen was reassigned to Mesonacis fremonti (Walcott, 1910) by Walcott 1910; not pl. 21, fig. 13 = O. nevadensis, following Walcott 1910] [pl. 21, fig. 14 is the same specimen as White 1877, fig. 3c, and was erroneously reassigned to O. clarki (Resser, 1928) by Palmer & Halley 1979] 1886 Olenellus Gilberti Meek in White; Walcott (part): ?34 (Highland Range), ?35 (Highland Range), ?36 (Timpahute Range), ?38 (Silver Peak), ?40 (Kicking Horse Lake, British Columbia), 47, 55, 170-180, pl. 19, figs. 2, 2a, 2b only, pl. 20, fig. 4 only, pl. 21, ?figs. 1, 1a only [not p. 39; not pl. 18, figs. 1, 1a = Olenellus howelli Meek in White, 1874 following Palmer & Halley 1979; not p. 32; not pl. 18, fig. 1b = M. fremonti; not pl. 18, fig. 1c = olenelloid sp. indet., this was reassigned to M. fremonti by Walcott 1910; not pl. 19, figs. 2c, 2g = O. nevadensis following Walcott 1910; not pl. 19, figs. 2d = ?Bristolia anteros Palmer in Palmer & Halley, 1979, this was erroneously reassigned to O. nevadensis by Walcott 1910; ?not pl. 19, fig. 2e = olenelloid sp. indet., this was 1 erroneously reassigned to M. fremonti by Walcott 1910; ?not pl. 19, fig. 2f = olenelloid hypostome sp. indet., this was erroneously reassigned to O. nevadensis by Walcott 1910; not pl. 19, figs. 2h, 2i, 2k = indeterminate thoracic segments, some of these were erroneously reassigned to M. fremonti by Walcott 1910; not pl. 20, figs. 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1k, 1l = various species of Bristolia and Paranephrolenellus following Palmer & Halley 1979 and Webster 2007c; not pl. 21, figs. 2, 2a = Bristolia fragilis Palmer in Palmer & Halley, 1979, this was erroneously reassigned to M. fremonti by Walcott 1910] 1886 Olenellus Gilberti Meek in White; Brögger: 183, 187 [mentioned] 1887 Olenellus gilberti Meek in White; Holm: 514-515 [mentioned] ?1888 Olenellus Gilberti Meek in White; Walcott: 162 [mentioned as occurrence in Highland Range] 1889 Olenellus gilberti Meek in White; Lesley (part): 490, pl. 21, ?figs. 1, 1a only [not pl. 21, fig. 2a = B. fragilis; not pl. 20, figs. 1, 1a, 1b, 1f = various species of Bristolia and Paranephrolenellus following Palmer & Halley 1979 and Webster 2007c] 1890 Olenellus gilberti Meek in White; Walcott (part): 636, pl. 84, ?figs. 1, 1a only, pl. 85, figs. 1b, 1c, 1d only, pl. 86, fig. 4 only [not pl. 84, fig. 1b, 1c = O. howelli following Palmer & Halley 1979; not pl. 84, fig. 1d = olenelloid sp. indet., this was reassigned to M. fremonti by Walcott 1910; not pl. 84, fig. 1e = ?B. anteros, this was erroneously reassigned to O. nevadensis by Walcott 1910; not pl. 84, fig. 1f = indeterminate thoracic segment, this was erroneously reassigned to M. fremonti by Walcott 1910; not pl. 84, fig. 1g = olenelloid hypostome sp. indet., this was erroneously reassigned to O. nevadensis by Walcott 1910; not pl. 85, fig. 1, 1a = B. fragilis, this was erroneously reassigned to M. fremonti by Walcott 1910; not pl. 85, figs. 1e, 1g = O. nevadensis, following Walcott 1910; not pl. 85, fig. 1f = olenelloid sp. indet., this was erroneously reassigned to M. fremonti by Walcott 1910; not pl. 86, figs. 1, 1a-m = various species of Bristolia and Paranephrolenellus following Palmer & Halley, 1979 and Webster 2007c] 2 1890 Olenellus (Elliptocephalus) gilberti Meek in White; Marcou (part): 100 [Pioche region occurrences only] [not p. 99; referring to Eureka District occurrence of Walcott] ?1890 Elliptocephalus (Olenellus) gilberti Meek in White; Marcou: 101 [referring to supposed Oquirrh Range occurrence] 1893 Olenellus gilberti Meek in White; Vogdes: 326 [mentioned in taxonomic list] not 1894 Olenellus gilberti Meek in White; Peach: 671, pl. 32, figs. 9, 10 [pl. 32, fig. 9 = ?B. anteros; pl. 32, fig. 10 = Bristolia? sp.][these specimens were reassigned to Mesonacis fremonti by Walcott 1910, then reassigned back to ?Olenellus gilberti by Palmer & Halley 1979] 1906 Olenellus gilberti Meek in White; Pack: 292 [mentioned in faunal list for Pioche region, citing Walcott 1886] 1908a Olenellus gilberti Meek in White; Walcott: pl. 2, fig. 1 not 1908a Olenellus canadensis Walcott, 1910; Walcott (part): 242 [supposed occurrence in Mount Whyte Formation; Walcott 1910, p. 325 stated that this collection contains both O. canadensis and O. gilberti] 1908b Olenellus gilberti Meek in White; Walcott: 184, ?189 [listed in faunal lists for Pioche region and Barrel Spring section of Silver Peak, Nevada] ?1908b Holmia rowei Walcott, 1910; Walcott (part): 189 [listed in unit 3 of Barrel Spring section only; reassigned to Olenellus argentus Walcott, 1910 and O. gilberti by Walcott 1910, p. 325] not 1908b Olenellus canadensis Walcott; Walcott (part): 215 [supposed occurrence in Mount Whyte Formation; Walcott 1910, p. 325 stated that this collection contains both O. canadensis and O. gilberti] 1908b Olenellus claytoni Walcott, 1910; Walcott (part): 189 [listed in unit 6 of Barrel Spring section only; reassigned to O. claytoni and O. gilberti by Walcott 1910, p. 325] 1910 Olenellus gilberti Meek in White; Walcott (part): 324-330, pl. 36, figs. 1, 2, 3, ?6, ?9 only [not pl. 36, figs. 4, 4a = O. howelli, following Palmer & Halley 1979; not pl. 36., fig. 5 = olenelloid hypostome sp. indet.; not pl. 36, fig. 7 = Olenellus sp.; not pl. 36, fig. 8 = olenelloid sp. indet.; not pl. 36, fig. 10 = olenelloid sp. indet.; 3 not pl. 36, figs. 11-15 = olenelloid sp. indet. [these were treated as "Olenellus gilberti (?)" by Palmer 1957, p. 120]; not pl. 36, figs. 16, 17 = Olenellus spp. indet.; not pl. 43, figs. 5, 6 = olenelloid sp. indet.] 1910 Olenellus gilberti Meek in White; Grabau and Shimer (part): 263, ?fig. 1555c only [not figs. 1555d, e = O. howelli] 1912 Olenellus gilberti Meek in White; Walcott (part): ?130 (locality 35e), ?138 (localities 1m, 1p), 158, ?161 (locality 1l, 1m, 1p), 189, 192, ?197 (locality 35e) only [not p. 198 = locality 35f occurrence] 1914 Olenellus gilberti Meek in White; Burling: 97 [mentioned, as zone], ?99 [Oquirrh Range occurrence mentioned], 101 [mentioned, as zone], 111 [mentioned, as zone], 120, 121, 123, 127 [mentioned, as zone], 129 [mentioned, as zone] not 1916 Mesonacis gilberti (Meek in White); Walcott: 406-407, pl. 45, fig. 3 [= Olenellus sp. undet., following Palmer 1998, from locality 35n; specimen later reillustrated by Norford 1962] 1917 Mesonacis gilberti (Meek in White); Walcott (part): ?64 only [occurrence at locality 61d] [not pp. 65, 99 = Mount Whyte occurrences; not pl. 9, fig. 4 = Olenellus sp. undet., following Palmer 1998; specimen later reillustrated by Norford 1962] ?1921 Mesonacis gilberti (Meek in White); Clark: 6 [occurrence in Latham Shale and/or Cadiz Formation] not 1927 Olenellus gilberti Meek in White; Raw: 137 [mentioned; citing immature cephala described by Walcott] not 1927 Mesonacis gilberti (Meek in White); Poulsen: 256, pl. 15, fig. 2 [cephalic fragment listed as Olenellus sp. ind. and tentatively referred to Mesonacis gilberti; = olenelloid sp. indet.] 1931 Mesonacis gilberti (Meek in White); Bell: 10, 11, 20 [mentioned] 1932 Olenellus gilberti Meek in White; Westgate & Knopf: 10 [citing Walcott’s 1912 faunal list for Pioche] ?1932 Olenellus gilberti Meek in White; Gilluly: 11 [citing Walcott’s 1890 faunal list for the Oquirrh Range, Utah], 12 [citing Burling’s 1914 Olenellus gilberti zone] 1934 Olenellus gilberti Meek in White; Schwarzbach: 22 [mentioned in species comparison] 4 1936 Olenellus gilberti Meek in White; Kobayashi: 158, 162 [mentioned in species comparison] 1936 Mesonacis gilberti (Meek in White); Grabau (part): 66, 133 only [Pioche region occurrences only] [not occurrences listed on pp. 43, 44, 46, 56, 58, 64, 67, 70] not 1936 Olenellus gilberti Meek in White; Stubblefield: 424, 425 [mentioned; citing Walcott 1910, pl. 36, fig. 12 and pl. 43, fig. 6], fig. 8f [reillustration of Walcott 1910, pl. 43, fig. 6] not 1937 Olenellus gilberti Meek in White; Raw: 582, 583, 588, 589 [mentioned, citing immature cephala and specimens since reassigned to other genera figured by Walcott] ?1937 Olenellus gilberti Meek in White; Callaghan: 18 [mentioned in faunal list for new collections in Delamar district] not 1937 Olenellus gilberti Meek in White; Öpik: 127 [mentioned; citing Walcott 1910, pl. 43, fig. 6] 1938 Olenellus gilberti Meek in White; Mason: 290 [mentioned in general faunal list of Olenellus fauna] ?1938 Olenellus gilberti Meek in White; Deiss: 1156, 1159, 1160, 1166 [listed and mentioned as tentative identification from new collection in Combined Metals Member of Highland Range] ?1939 Olenellus gilberti Meek in White; Wheeler & Lemmon: 18 [listed as tentative identification in uppermost 100 feet of Prospect Mountain Quartzite from Eureka], 54 [citing tentative occurrence in Combined Metals Member of Deiss 1938; mis-spelled Olenelus gilberti?] ?1940 Olenellus gilberti Meek in White; Wheeler: 12, 16 [citing tentative occurrence in Combined Metals Member of Deiss 1938] ?1943 Olenellus gilberti Meek in White; Wheeler: 1786 [listed in faunal list of Pioche Shale from Eureka], 1789, 1790 [citing tentative identification in Combined Metals Member of Deiss 1938], 1804 [citing identification in Delamar district of Callaghan 1937] 1944 Olenellus gilberti Meek in White; Shimer & Shrock: 613, pl.