Laguna Umayo, Chulpas level (Paleocene to of Peru)

Also known as LURMU

Where: Puno, Peru (15.7° S, 70.2° W: paleocoordinates 18.3° S, 59.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Muñani Formation (Puno Group), Thanetian to Thanetian (59.2 - 47.8 Ma)

• Lower Muñani Formation. Likely correlative to Chron 26r (early Late Paleocene) or Chron 24r (latest Paleocene–earliest Eocene), or, less likely, to Chron 29r (latest Cretaceous–earliest Paleocene). Correlation to Chron 24r is favored (Sige et al. 2004).

•Chron 24r (Thanetian– Ypresian) (Sigé et al. 2004).

•Originally attributed to Vilquechico Formation (Maastrichtian-Danian) on paleobotanical evidence (charophytes).

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; argillaceous, calcareous conglomerate and lithified sandstone

• "The fossils are found in thin banks of heterogeneous sediment, a sort of microconglomerate formed from fine, irregular, more or less rounded calcareous nodules, and clayey and partially calcitic cement. Within these beds, some last thin clay layers preserve dessication marks. This matrix is often superficially altered and friable, more compact in-depth. The series includes several beds of this nature, which alternate with thicker deposits of red clays, grayish-red marls, and banks of compact sandstone. Throughout this ensemble, and particularly in the fossiliferous levels, cross-bedded stratifications abound. At the base, the series rests by soft layers (clays?) on an ensemble where compact sandstones dominate in thick banks. At the summit, they terminate by a strong thickness of soft beds, and pass to an essentially detritic ensemble, beginning with very ferruginous sandstones." (Translation by M. Carrano)

Size classes: macrofossils, mesofossils

Collected in 1993 onwards

Primary reference: B. Sigé, T. Sempere, R. F. Butler, L. G. Marshall, and J.-Y. Crochet. 2004. Age and stratigraphic reassessment of the fossil-bearing Laguna Umayo red mudstone unit, SE Peru, from regional stratigraphy, fossil record, and paleomagnetism. Geobios 37:771-794 [P. Mannion/P. Mannion]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 132938: authorized by Philip Mannion, entered by Philip Mannion on 29.08.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Osteichthyes
 Ceratodontiformes - Lepidosirenidae
Lepidosiren cf. paradoxa Fitzinger 1837 South American lungfish
Mammalia
 Placentalia -
Notoungulata "sp. 1" Roth 1903 notoungulate
CHU 31 and 32 (teeth)
Notoungulata "sp. 2" Roth 1903 notoungulate
CHU 45, 46, 53 and 54 (teeth)
Notoungulata "sp. 3" Roth 1903 notoungulate
CHU 61 (tooth)
 Eutheria -
Proteutheria indet. Romer 1966 eutherian
CHU 39, 40, 42 and 43 (teeth)
 Didelphimorphia - Didelphidae
Didelphidae "sp. 1" opossum
CHU 17-19 and 26 (teeth)
Didelphidae "sp. 2" opossum
CHU 21 (tooth)
Didelphidae "sp. 3" opossum
CHU 14-16 (teeth)
Didelphidae indet. opossum
CHU 21,22 and 24 (teeth)
 Theriamorpha - Peradectidae
? Caroloameghiniinae indet. Ameghino 1901 marsupial
CHU 35 (right M4)
 Polydolopimorphia - Sillustaniidae
Sillustania quechuense n. gen. n. sp.
Sillustania quechuense n. gen. n. sp. Crochet and Sigé 1996 metatherian
 Polydolopimorphia -
aff. Chulpasia indet. Crochet and Sigé 1993 metatherian
Chulpasia mattaueri n. gen. n. sp. Crochet and Sigé 1993 metatherian
CHU 30 - holotype (LM1); referred material: CHU 12 (RM2 or 3), CHU 1 (LM1), CHU 2 (LM2 or 3), and CHU 5-11 (fragmented teeth)
Reptilia
 Loricata -
"Crocodilia indet." = Crocodylia
"Crocodilia indet." = Crocodylia Owen 1842 crocodilian
Actinopteri
 Characiformes - Characidae
 Albuliformes - Albulidae
cf. Albulidae indet. Bleeker 1859 bonefish