Laux-Montaux (Cretaceous of France)

Where: Rhône-Alpes, France (44.3° N, 5.6° E: paleocoordinates 35.3° N, 14.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Neocomites peregrinus ammonoid zone, Late/Upper Valanginian (140.2 - 136.4 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; gray, yellow marl

• "The whole sequence was deposited in the southern part of the Vocontian Basin, a highly subsident Mesozoic basin at the northwestern border of Tethys"
• "The specimen was discovered close to the top of a small hill formed by greyish to yellowish marls, interrupted periodically by small (≈10 cm) limestone or marly limestone beds. Two large slumped units have been recognized near the top of the sequence."

Size class: macrofossils

• "the anterior part of a well-preserved snout, with 124 associated teeth or tooth fragments"

Collected by A. Clément

Primary reference: V. Fischer, A. Clement, M. Guiomar and P. Godefroit. 2011. The first definite record of a Valanginian ichthyosaur and its implications on the evolution of post-Liassic Ichthyosauria. Cretaceous Research 32:155-163 [M. Carrano/H. Street]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 104753: authorized by Matthew Carrano, entered by Hallie Street on 09.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Adiakritobelus sp.
Cephalopoda
 Belemnitida - Duvaliidae
Duvalia binervia, Pseudobelus brevis
 Belemnitida - Mesohibolitidae
Hibolithes subfusiformis
 Ammonitida - Haploceratidae
"Neolissoceras grasianum" = Haploceras grasianum
"Neolissoceras grasianum" = Haploceras grasianum d'Orbigny 1841 ammonite
 Ammonitida - Himantoceratidae
Himantoceras acuticostatum
Himantoceras acuticostatum Thieuloy 1965 ammonite
 Ammonitida - Neocomitidae
Neocomites neocomiensis
Neocomites neocomiensis d'Orbigny 1841 ammonite
 Ammonitida - Bochianitidae
Bochianites neocomiensis
Bochianites neocomiensis d'Orbigny 1842 ammonite
 Ammonitida - Olcostephanidae
"Olcostephanus nicklesi" = Olcostephanus (Olcostephanus) nicklesi, Olcostephanus densicostatus
"Olcostephanus nicklesi" = Olcostephanus (Olcostephanus) nicklesi Wiedmann and Dieni 1968 ammonite
Olcostephanus densicostatus Wegner 1909 ammonite
 Phylloceratida - Phylloceratidae
Phyllopachyceras sp.
Phyllopachyceras sp. Spath 1925 ammonite
Reptilia
 Ichthyosauria - Ophthalmosauridae
Aegirosaurus sp.
Aegirosaurus sp. Bardet and Fernandez 2000 ichthyosaur
RGHP LA 1