San Sebastian (Miocene to of the United States)

Where: Puerto Rico (18.3° N, 66.9° W: paleocoordinates 18.1° N, 65.7° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lares Formation, Aquitanian to Aquitanian (23.0 - 16.0 Ma)

• The age of the decapod-bearing site is early Miocene based on the occurrence of the foraminiferan Miosorites americanus, which does not occur in the Oligocene (Wilson Ramírez, pers. comm., 2003).

Environment/lithology: reef, buildup or bioherm; fine-grained, medium packstone

• indurated, very pale orange, fine to medium grained calcarenite stratified in beds 10 cm to 1 m thick

Size class: macrofossils

Preservation: replaced with calcite

Reposited in the USNM

Collection methods: surface (in situ), mechanical,

Primary reference: C. E. Schweitzer, M. Iturralde-Vinent, J. L. Hetler and J. Velez-Juarbe. 2006. Oligocene and Miocene decapods (Thalassinidea and Brachyura) from the Caribbean. Annals of Carnegie Museum 75(2):111-136 [C. Schweitzer/C. Schweitzer/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 65590: authorized by Carrie Schweitzer, entered by Carrie Schweitzer on 22.09.2006, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Malacostraca
 Decapoda -
? Brachyura indet.
? Brachyura indet. Latreille 1802 crab
 Decapoda - Portunidae
Necronectes collinsi, Psygmophthalmus lares n. gen. n. sp.
Necronectes collinsi Schweitzer et al. 2006 swimming crab
Psygmophthalmus lares n. gen. n. sp. Schweitzer et al. 2006 swimming crab
 Decapoda - Calappidae
Calappa pavimenta n. sp.
Calappa pavimenta n. sp. Schweitzer et al. 2006 box crab
Tubothalamea
 Miliolida - Soritidae
Miosorites americanus