Level M, UCMP V70243 (Eocene of the United States)
Also known as Patrick Draw Zonule "M", Bitter Creek area
Where: Sweetwater County, Wyoming (41.7° N, 109.0° W: paleocoordinates 46.6° N, 92.6° W)
• coordinate based on political unit
When: Wa4 mammal zone, Main Body Member (Wasatch Formation), Wasatchian (55.8 - 50.3 Ma)
Environment/lithology: channel lag; gray siltstone and sandstone
• Level M represents fossiliferous gray siltstones as well as channel sandstones (Savage et al. 1972); the latter preserve channel lags of bone reworked from the siltstones, and the fauna of the two is identical.
Size classes: macrofossils, mesofossils
Reposited in the UCM, UCMP
Collection methods: bulk, surface (float), sieve
Primary reference: K. T. Smith and J. A. Gauthier. 2013. Early Eocene lizards of the Wasatch Formation near Bitter Creek, Wyoming: diversity and paleoenvironment during an interval of global warming. Bulletin of the Peabody Museum of Natural History 54(2):135-230 [P. Barrett/T. Cleary]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 181313: authorized by Paul Barrett, entered by Terri Cleary on 06.09.2016, edited by Patricia Holroyd
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
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Palaeoxantusia amara Smith and Gauthier 2013 night lizard V70243: UCMP ?215075, ?215078 (left maxilla fragments), 215082 (right maxilla fragment), 215117, 215123, 215124 (right dentary fragments), 215125 (partial right dentary), 215139 (left dentary fragment), 215140 (right dentary fragment), 215143 (right maxilla fragment), 215175, 215182 (left maxilla fragment), 215189 (right maxilla fragment), 215265 (left dentary fragment), ?215267 (right dentary fragment), 215306 (left dentary fragment), ?215316 (partial premaxilla), 215321, 215331 (left maxilla fragment), 215349, 215360, 215361 (left maxilla fragments), 215362, 215363 (right maxilla fragments), 215367 (left maxilla fragment), ?215404 (edentulous left dentary fragment), 215405 (partial left spleniodentary), 215406, 215407 (left dentary fragment), 215408–215410 (right dentary fragments), 215411 (left dentary fragment), 215412, 215413 (right dentary fragment), 215414, 215415 (dentary fragments), 215416 (right dentary fragment), 215550 (right dentary fragment), 215562 (partial left spleniodentary), 215563 (partial right dentary), 215612 (right maxilla fragment);
Palepidophyma paradisa Smith and Gauthier 2013 night lizard UCMP 215069 (right maxilla fragment), 215263 (right dentary fragment), 215279 (partial right maxilla; Figure 11H), 215281 (right maxilla fragment), 215283 (left maxilla fragment), 215307 (partial premaxilla), 215418 (right dentary fragment), 215603 (right dentary fragment; Figure 11K).
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Scincoideus grassator Smith and Gauthier 2013 squamates UCMP 215047 (partial right frontal), 215049 (right frontal fragment), 215065 (right maxilla fragment), 215077 (left maxilla fragment), 215079 (right maxilla fragment), ?215081 (left maxilla fragment), 215095 (left dentary fragment), 215092 (left dentary fragment), 215094 (right dentary fragment), 215095 (left dentary fragment), 215096 (right dentary fragment), 215097 (left dentary fragment), 215101 (right dentary fragment), 215102, 215106 (left dentary fragments), 215110 (partial right dentary), 215128, 215129 (partial premaxillae), 215141 (right dentary fragment), 215151 (left dentary fragment), 215152, 215153 (right dentary fragments), 215155 (left dentary fragment), 215156, 215157 (right dentary fragments), 215158–215161 (left dentary fragments), 215162 (right dentary fragment), 215163 (left dentary fragment), 215164 (right dentary fragment), 215179 (left maxilla fragment), 215183, 215184 (partial left maxilla), 215185 (left maxilla fragment), 215188, 215190 (right maxilla fragments), 215191 (left maxilla fragment), 215207 (right frontal fragment), 215247, 215249, 215255, 215258 (left dentary fragments), 215287, 215290, 215291 (left maxilla fragments), 215292 (left dentary fragment), 215299 (left maxilla fragment), 215300 (partial left maxilla), 215312, 215313, 215315, 215317, 215318 (partial premaxillae), 215337 (right maxilla fragment), 215340, 215342 (left maxilla fragments), 215345 (right maxilla fragment), 215347, 215348, 215350, 215351, 215355 (right maxilla fragments), 215357, 215381 (left dentary fragments), 215382 (right dentary fragment), 215383, 215384 (partial right dentaries), 215386, 215388 (left dentary fragments), 215389 (dentary fragment), 215390 (right dentary fragment), 215392, 215394 (left dentary fragments), 215395–215399 (right dentary fragments), 215400, 215401 (left dentary fragments), 215402 (right dentary fragment), 215420 (left dentary fragment), 215422, 215423 (right dentary fragments), 215551, 215552 (left maxilla fragments), 215556 (right dentary fragment), 215566 (left dentary fragment), 215567 (partial left maxilla), 215568 (right dentary fragment), 215574 (left dentary fragment), 215602 (dentary fragment), 215604, 215605 (left dentary fragments), 215606, 215608, 215609, 215615 (right dentary fragments).
Entomophontes incrustatus Smith and Gauthier 2013 squamates UCMP 215051 (right frontal fragment), 215072 (left maxilla fragment), 215113 (right dentary fragment), 215131 (partial premaxilla), 215147 (left dentary fragment), 215194 (left maxilla fragment), 215200 (left maxilla fragment), 215328, 215338 (right maxilla fragments), 215339 (left maxilla fragment), 215427, 215434 (jaw fragments), 215435 (teeth), 215436 (jaw fragment), 215474 (partial parietal), 215478 (partial right frontal), 215522 (right maxilla fragment), 215541 (parietal fragment; Figure 25A), 215547 (right maxilla fragment), 215564 (partial left frontal; Figure 24F), 215573 (left dentary fragment)
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Provaranosaurus fatuus Smith and Gauthier 2013 squamates UCMP 215052, 215053 (partial left frontal), 215054–215056 (partial right frontal), 215058 (left frontal fragment), 215059 (parietal fragment), 215114 (right dentary fragment), 215148 (right dentary fragment), 215205 (partial frontal), 215209 (partial right frontal), 215211 (partial frontal), 215217, 215218 (partial right frontals), 215241 (right dentary fragment), 215252 (left dentary fragment), 215324 (left maxilla fragment), 215476, 215477 (partial right frontals), 215531 (partial right frontal), 215536, 215537 (parietal fragments; Figure 29D, C, respectively), 215538 (partial right frontal), 215428 (left dentary fragment), 215542 (partial right frontal), 215804 (partial frontal; Figure 28L, M)
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cf. Saniwa "sp. B" Leidy 1870 squamates UCMP 215438 (premaxilla fragment), 215578 (partial anterior dorsal vertebra), 399754 (right dentary fragment).
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Gerrhonotinae indet., Glyptosaurinae "indet A", Glyptosaurinae "indet B", Xestops savagei n. sp., Proxestops sp.2, Eodiploglossus borealis
Gerrhonotinae indet. Cope 1864 squamates UCMP 215076 (right maxilla fragment), 215554 (left dentary fragment), 215595 (left maxilla fragment)
Glyptosaurinae "indet A" Marsh 1872 squamates UCMP 215121 (jaw fragment), 215222 (frontal fragment), 215376 (dentary fragment), 215523 (jaw fragment), 215613 (right dentary fragment), 215623 (jaw fragment), 215643 (partial left maxilla)
Glyptosaurinae "indet B" Marsh 1872 squamates UCMP ?215045 (skull fragment), ?215219 (dermal skull bone fragment), ?215225 (right maxilla fragment; Figure 20B), 215378 (left maxilla fragment), 215544 (skull fragment), 215619 (partial premaxilla; Figure 20A), 215620 (left maxilla fragment; Figure 20C), ?215625 (dermal skull bone fragment)
Xestops savagei n. sp. Smith and Gauthier 2013 squamates UCMP 146425 (holotype), partial parietal; Paratypes: UCMP ?215044 (right palatine fragment), ?215073 (right maxilla fragment), 215103 (right dentary fragment), 215108 (premaxilla fragment), 215115 (left dentary fragment), 215116 (right dentary fragment), 215118 (jaw fragment), 215119 (left maxilla fragment; Figure 23A), 215133 (premaxilla fragment), 215169 (left dentary fragment), 215196 (left maxilla fragment), 215197 (right maxilla fragment), 215198 (right maxilla fragment), 215199 (left maxilla fragment), 215220 (parietal fragment), 215227 (partial premaxilla), 215232 (partial right dentary), ?215235 (right dentary fragment), 215237 (right maxilla fragment), 215238 (jaw fragment), ?215240 (jaw fragment), 215242 (jaw fragment), 215243 (five jaw fragments), 215280 (left maxilla fragment), ?215282 (left maxilla fragment), 215327 (right dentary fragment), 215329 (right maxilla fragment), 215333 (partial premaxilla; Figure 19A), 215334 (right dentary fragment), 215335 (right maxilla fragment), 215429 (jaw fragment), 215473 (partial parietal), 215524 (right dentary fragment), 215540 (right frontal fragment), 215543 (left frontal fragment), 215571 (right maxilla fragment), 215622 (right dentary fragment).
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Suzanniwana sp. Smith 2009 squamates UCMP 215043 (right pterygoid fragment; Figure 3D), 215057 (frontal fragment), ?215060 (frontal fragment), 215070 (right maxilla fragment), 215109 (left dentary fragment), 215111, 215112 (right dentary fragments), 215170 (right maxilla fragment), 215171 (left dentary fragment), 215172 (right dentary fragment), 215201 (left dentary fragment), 215202 (right maxilla fragment), 215208 (frontal fragment), ?215226 (left dentary fragment), ?215230, ?215231 (premaxilla fragments), 215245 (partial left dentary), ?215250 (left dentary fragment), 215270 (partial right dentary), 215271 (partial left dentary), 215277, 215278 (right maxilla fragments), 215284 (anterior right maxilla fragment), 215319 (left maxilla fragment), 215320 (anterior left maxilla fragment), 215336 (right maxilla fragment), 215352 (right maxilla fragment), 215385 (dentary fragment), 215391 (right dentary fragment), 215393 (left dentary fragment), 215419, 215421 (right dentary fragments), 215553, 215558 (left maxilla fragments), 215569 (right dentary fragments).
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