Where: California (34.9° N, 116.8° W: paleocoordinates 34.1° N, 111.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Calico Member (Barstow Formation), Hemingfordian (20.4 - 16.0 Ma)

• Overlying fine-grained lacustrine beds (here referred to as the Calico Member of the Barstow Formation) are bracketed between ca. 19 and 16.9 Ma, and are thus older than the type section of the Barstow Formation in the Mud Hills. Several 17.1–16.8 Ma calc-alkaline dacite domes intrude the Calico Member.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified, concretionary siltstone

Size class: macrofossils

Preservation: cast, replaced with silica

Reposited in the USNM

Collection methods: chemical,

• The recovered fossils are deposited in the paleontological collection of the Department of Geological Sciences, University of California, Santa Barbara (holotype at USNM)

Primary reference: K. B. Miller and S. H. Lubkin. 2001. Calicovatellus petrodytes, a new genus and species of primitive vatelline diving beetle (Coleoptera: Dytiscidae: Hydroporinae: Vatellini) from the Miocene Barstow Formation, southern California, USA. Journal of Paleontology 75:890-894 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152044: authorized by Matthew Clapham, entered by Matthew Clapham on 03.11.2013

Creative Commons license: CC BY (attribution)