Quarry west of Mexia (Paleocene of the United States)

Where: Texas (31.7° N, 96.6° W: paleocoordinates 36.4° N, 76.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Mexia Clay Member (Wills Point Formation), Danian (66.0 - 61.6 Ma)

• Decapods from the basal Mexia Clay member at the study quarry

• group of beds-level stratigraphic resolution

Environment/lithology: marine; concretionary claystone

• Siltstone/claystone lenses with abundant yellow, brown, and black calcareous nodules that preserve the fossil decapods

Size class: macrofossils

Preservation: concretion

Collection methods: Repository: Texas Natural Science Center, Austin (previously Paleontological Collection of the Bureau of Economic Geology, University of Texas), under acronym NPL, and Museu de Geologia del Seminari de Barcelona, under acronym MGSB

Primary reference: A. Armstrong, T. Nyborg, G. A. Bishop Ossó-Morales and F. J. Vega. 2009. Decapod crustaceans from the Paleocene of Central Texas, USA. Revista Mexicana de Ciencias Geológicas 26(3):745-763 [C. Schweitzer/C. Schweitzer/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 207141: authorized by Mark Uhen, entered by Mark Uhen on 30.12.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

 Decapoda - Palinuridae
Linuparus cf. wilcoxensis Rathbun 1935 spiny lobster
 Decapoda - Pinnotheridae
Viapinnixa mexiaensis n. sp. Armstrong et al. 2009 crab
 Decapoda - Retroplumidae
Costacopluma texana n. sp. Armstrong et al. 2009 crab
 Decapoda - Palaeoxanthopsidae
Paraverrucoides alabamensis Rathbun 1935 crab
 Decapoda - Mathildellidae
Tehuacana americana Rathbun 1935 crab
 Decapoda - Goniodromitidae
Pithonoton cardwelli n. sp. Armstrong et al. 2009 crab
 Decapoda -
Prehepatus sp. Rathbun 1935 crab
 Decapoda - Dromiidae
Kierionopsis nodosa Davidson 1966 crab
 Decapoda - Feldmanniidae
Caloxanthus sp. Milne-Edwards 1864 crab
 Decapoda - Raninidae
Raninoides bournei, "Raninoides treldenaesensis" = Laeviranina treldenaesensis
Raninoides bournei Rathbun 1928 crab
"Raninoides treldenaesensis" = Laeviranina treldenaesensis Collins and Jakobsen 2003 crab
 Decapoda -
Paguroidea indet. Latreille 1802 hermit crab
 Decapoda - Nephropidae
Hoploparia sp., "Macroacaena johnsoni" = Hoploparia johnsoni
Hoploparia sp. M'Coy 1849 clawed lobster
"Macroacaena johnsoni" = Hoploparia johnsoni Rathbun 1935 clawed lobster