Also known as Stegomus arcuatus holotype site
Where: New Haven County, Connecticut (41.3° N, 72.9° W: paleocoordinates 17.4° N, 18.7° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: New Haven Formation (Chatham Group), Alaunian (215.6 - 212.0 Ma)
• Middle part of the formation, of nid-Norian age. The basal portion of the New Haven Formation has yielded a palynoflorule dated as latest Carnian to early Norian. The upper part of the formation has yielded the procolophonid Hypsognathus and a sphenodontid (cf. Sigmala) indicative of a latest Triassic (probably Rhaetian) age. U-Pb dating of the lower part of the formation has yielded a date of 211.9 +/- 2.1 Ma, placing it in the Norian stage on recent geological timescales.
• bed-level stratigraphic resolution
Environment/lithology: terrestrial; coarse-grained, brown, red sandstone
Size class: macrofossils
Preservation: mold/impression
Collected by F. P. Clark in 1895; reposited in the YPM
Collection methods: quarrying, mechanical,
Primary reference: O. C. Marsh. 1896. A new belodont reptile (Stegomus) from the Connecticut river sandstone. American Journal of Science 2:59-62 [R. Butler/R. Butler]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 91750: authorized by Matthew Carrano, entered by Matthew Carrano on 19.10.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
Stegomus arcuatus n. gen. n. sp.
Stegomus arcuatus n. gen. n. sp. Marsh 1896 aetosaur YPM 1647, natural cast of the ventral aspect of part of the dorsal carapace
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