Mesa Tesoro (Oligocene of Mexico)

Also known as Mesa el Tesoro, Mesa del Tesoro

Where: Baja California Sur, Mexico (24.5° N, 110.7° W: paleocoordinates 23.3° N, 102.3° W)

• coordinate stated in text

When: San Juan Member (El Cien Formation), Chattian (28.1 - 23.0 Ma)

Environment/lithology: lagoonal; mudstone

• The strata indicate coastal deposits suggesting shelf environments, coastal lagoons, estuaries and deltas (Schwennicke 1994).
• The San Juan Member comprises mudstone, siltstone, sandstone, conglomerates, coquinas, tuffs and phosphorite rocks (Fischer et al. 1995).

Size class: macrofossils

Primary reference: A. E. Hernández Cisneros, G. González Barba, and R. E. Fordyce. 2017. Oligocene cetaceans from Baja California Sur, Mexico. Boletín de la Sociedad Geológica Mexicana 69(1):149-173 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 185160: authorized by Mark Uhen, entered by Mark Uhen on 14.04.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Chaeomysticeti indet., Odontoceti indet.
Chaeomysticeti indet.
MHN-UABCS_EcSj1/47/168, MHN-UABCS_EcSj1/29/145, MHN-UABCS_EcSj1/51/184
Odontoceti indet.
MHN-UABCS_EcSj1/50/177, MHN-UABCS_EcSj1/44/165
Mammalia
 Cetacea -
? Balaenopteroidea indet.
? Balaenopteroidea indet. whale
MHN-UABCS_EcSj1/29/143
 Cetacea - Eomysticetidae
Eomysticetidae indet.
Eomysticetidae indet. Sanders and Barnes 2002 whale
MHN-UABCS EcSj1/29/142 (sp. 2)
 Cetacea - Aetiocetidae
Kaaucetus thesaurus n. gen. n. sp.
Kaaucetus thesaurus n. gen. n. sp. Hernández-Cisneros 2022 whale
MHN-UABCS_EcSj1/29/141, formerly identified as Eomysticetidae indet. sp. 1 by ref 62125
 Cetacea - Kekenodontidae
? Kekenodontidae indet.
? Kekenodontidae indet. whale
MHN-UABCS_EcSj1/38/155