Also known as UALP 7205
Where: Cochise County, Arizona (31.7° N, 109.6° W: paleocoordinates 4.0° S, 44.5° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Black Prince Limestone Formation, Westphalian A to Westphalian A (318.7 - 314.6 Ma)
• "The amphibian bed [is] located one meter below the top of the Black Prince [Limestone] [...] The Swisshelm Mountain amphibian bed is dated near the Morrowan-Derryan(= Atokan) boundary, equivalent to the boundary of Westphalian A and B of Europe" (Thayer, 1985).
• bed-level stratigraphic resolution
Environment/lithology: shallow subtidal; intraclastic, shelly/skeletal, gray, yellow, silty limestone
Size classes: macrofossils, microfossils
Collection methods: bulk, acetic
• "Disarticulated faunal elements were obtained by digesting blocks of limestone and silty limestone in a 15 percent solution of acetic acid. The insoluble residue was washed through a 28-mesh screen to remove fine material." (thayer, 1985).
•UALP = University of Arizona Laboratory of Paleontology
Primary reference: D. W. Thayer. 1985. New Pennsylvanian Lepospondyl Amphibians from the Swisshelm Mountains, Arizona. Journal of Paleontology 59(3):684-700 [J. Mueller/T. Liebrecht]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 92271: authorized by Johannes Mueller, entered by Torsten Liebrecht on 04.11.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
| Conodonta | |
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Spathognathodus coloradoensis conodont | |
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Adetognathus lautus conodont
Adetognathus gigantus conodont | |
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Idiognathodus humerus conodont
Idiognathodus delicatus conodont | |
| Osteichthyes | |
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Tetrapoda indet. tetrapod UALP 4956 (single limb fragment), 5267 ("collection of large tetrapod bone fragments")
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Phlegethontia phanerhapha n. sp.
Phlegethontia phanerhapha n. sp. Thayer 1985 tetrapod UALP 5154 (type), 6035 (Holotype; a posterior braincase fragment including a notochordal pit, the right expccipital, and part of the right otic capsule)
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Ophiderpeton swisshelmense n. sp.
Ophiderpeton swisshelmense n. sp. Thayer 1985 tetrapod UALP 4958, 4963, 5149, 5164, 5167 (type), 5168, 5175, 5202, 5208, 5692, 5864, 6036, 6057, 6058, 6222 (all are single vertebrae)
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Elfridia bulbidens n. gen. n. sp.
Elfridia bulbidens n. gen. n. sp. Thayer 1985 amniote UALP 4960, 4961, 4969, 4970 (type), 5171, 5172, 5176, 5226, 5230, 5231, 5865 to 5868, 6037, 6038, 6225, 6232 to 6234, 6238 (all are single bones or bone fragments)
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| Amphibia | |
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? Lepospondyli indet. tetrapod UALP 5186 (two fragmentary ulnae), 5187 (? pectoral girdle element), 5189 (? fibula), 5199 (single atlas), 5200 (fragment of left femur), 5232 (pterygoid), 5242 (a jaw reminiscent of Hylerpeton longidentatum), 5251, 5252 (both are incomplete tibiae), 5253 to 5255 (all are probably fibulae), 6023 (two ribs), 6226 (crushed left humerus), 6228 (rib), 6230 (several radii), 6231 (scapula with associated clavicle or cleithrum), 6235 (pterygoid); list comprises only the more complete specimens
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? Ptyonius olisthmonaias n. sp.
? Ptyonius olisthmonaias n. sp. Thayer 1985 tetrapod UALP 5161, 5162, 5170, 5207, 5211, 5212, 5264 (type), 5694, 5857 to 5860, 6212, 6223 (all are single bones)
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Arizonerpeton wellsi n. gen. n. sp.
Arizonerpeton wellsi n. gen. n. sp. Thayer 1985 tetrapod UALP 4947 (type), 4948 to 4950, 4957, 5147, 5148, 5151, 5152, 5156 to 5158, 5163, 5165, 5181, 5203, 5266, 5691, 5693, 5701, 5861 to 5863, 6211 (all are single vertebrae)
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| Chondrichthyes | |
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Xenacanthidae indet. Fritsch 1889 elasmobranch | |
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Petalodontidae indet. Newberry and Worthen 1866 chimaera | |
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? Helodontidae indet. chimaera | |