Horsefly Mine, locality 8 (ROM collection) (Eocene of Canada)

Where: British Columbia, Canada (52.4° N, 121.4° W: paleocoordinates 57.2° N, 103.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ypresian (56.0 - 47.8 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified, carbonaceous mudstone

• The spider is preserved in a dark, winter layer of varved lacustrine sediment. The varves consist of dark and light laminae; the former are composed of sapropel (organic matter) and represent winter accumulation of decayed plant material and clays. The light laminae were orginally interpreted as tuffaceous (Wilson 1977a) but they were later shown to be composed of diatom remains.

Size class: macrofossils

Preservation: adpression

Collected by Mark Wilson; reposited in the ROM

Primary reference: P. A. Selden and D. Penney. 2009. A fossil spider (Araneae: Pisauridae) of Eocene age from Horsefly, British Columbia, Canada. Contributions to Natural History 12:1269-1282 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34864: authorized by Dena Smith, entered by April Kinchloe on 08.10.2003, edited by Matthew Clapham and Karl Volkman

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Actinopteri
 Cichliformes - Cichlidae
Priscacara aquilonia n. sp.
Priscacara aquilonia n. sp. Wilson 1977 cichlid
Arachnida
 Araneae -
Palaeoperenethis thaleri n. gen. n. sp.
Palaeoperenethis thaleri n. gen. n. sp. Selden and Penney 2009 spider
ROM 31304