Comal County [Hammett Fm] (Cretaceous of the United States)

Where: Comal County, Texas (29.8° N, 98.3° W: paleocoordinates 27.8° N, 51.8° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Hammett Formation, Early/Lower Aptian (121.4 - 122.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Hammett Fm of the Trinity Group. AGE: Early Aptian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: Checklist representative of entire formation.

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

• SPECIFIC LITHOLOGY: Lithology not described in publication. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (in situ),

• COLLECTORS: Authors of publication. REPOSITORY: Private amateur collections.

Primary reference: B. L. Emerson, J. H. Emerson, R. E. Akers and T. J. Akers. 1994. Texas Cretaceous ammonites and nautiloids. Texas Paleontology Series 5:1-439 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 84438: authorized by Austin Hendy, entered by Austin Hendy on 19.10.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for cephalopods and nautiloids. NOMENCLATURE: Authoritative publication, with fairly modern nomenclature and species-resolution identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Douvilleiceratidae
Eodouvilleiceras sp., "Cheloniceras (Cheloniceras) cornuelianum" = Cheloniceras cornuelianum, Procheloniceras aff. albrechtiaustriae
"Cheloniceras (Cheloniceras) cornuelianum" = Cheloniceras cornuelianum d'Orbigny 1840 ammonite
 Ammonitida - Deshayesitidae
"Dufrenoya rebeccae" = Dufrenoyia
"Dufrenoya rebeccae" = Dufrenoyia ammonite
 Ammonitida - Desmoceratidae
"Burckhardites palmensis" = Burckhardtites
"Burckhardites palmensis" = Burckhardtites ammonite