PBDB

La Pouza farmhouse (Jurassic of France)

Where: Auvergne-Rhône-Alpes, France (44.8° N, 4.8° E: paleocoordinates 34.8° N, 15.0° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Zigzag ammonoid zone, Early/Lower Bathonian (167.7 - 164.7 Ma)

• 3 beds (LaP1, LaP2, LaP3)

• group of beds-level stratigraphic resolution

Environment/lithology: slope or ramp reef; poorly lithified marl and gray, muddy limestone

• "A number of the echinoderm fragments are abraded, suggesting accumulation in a high-energy environment. The debris is concentrated in the basal part of the clay beds, and becomes progressively sparser into the higher part of each bed. The alternating marl-limestone couplets appear to represent background sedimentation in relatively deep water, perhaps reflecting climatically driven cycles, with a low background input of calcitic detritus from shallower environments, probably washed downslope by storms. The four graded beds containing abundant echinoderm material represent substantial, brief, input from a shallower environment, perhaps generated by major storm events or slope instability." "a steep slope at a depth of about 150 m"

• "Lower Bathonian marls and marly limestones containing siliceous sponges and brachiopods." "crinoidal limestones are surmounted by grey limestones and marlstone (‘‘Calcaires gris de la Pouza’’) of Early Bathonian age (Zigzag Zone)"

Size class: macrofossils

Collected by H. Hess & A.S. Gale in 1950s & 2010

• Natural History Museum Basel (Switzerland). Hess collected here in 1950s and Gale collected 100 kg of echinoderm-rich marl in 2010

Primary reference: H. Hess. 2012. Crinoids from the Middle Jurassic (Bajocian–Lower Callovian) of Arde`che, France. Swiss Journal of Palaeontology 131:121-253 [P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 225715: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 25.05.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Bivalvia
Pectinida -	"Limacea indet." = Limoidea "Limacea indet." = Limoidea Rafinesque 1815 scallop
Crinoidea
Isocrinida - Isocrinidae	Balanocrinus dumortieri, Balanocrinus inornatus, Balanocrinus pacomei, Isocrinus dumortieri, Isocrinus nicoleti Balanocrinus dumortieri de Loriol 1887 Sea lily 9 pluricolumnals, 11 columnals Balanocrinus inornatus d'Orbigny 1850 Sea lily Balanocrinus pacomei de Loriol 1887 Sea lily 1 columnal Isocrinus dumortieri Oppel 1865 Sea lily Isocrinus nicoleti Desor 1845 Sea lily 1 pluricolumnal
Cyrtocrinida - Eudesicrinidae	Dolichocrinus aberrans Dolichocrinus aberrans de Loriol 1882 Sea lily 8 cups
Cyrtocrinida - Phyllocrinidae	Phyllocrinus colloti, Phyllocrinus voultensis n. sp. Phyllocrinus colloti de Loriol 1882 Sea lily 1 cup Phyllocrinus voultensis n. sp. Hess 2012 Sea lily 1 cup
Cyrtocrinida - Sclerocrinidae	Cyrtocrinus praenutans n. sp. Cyrtocrinus praenutans n. sp. Hess 2012 Sea lily 347 cups plus columnals, attachment discs, and brachials
Cyrtocrinida - Eugeniacrinitidae	Lonchocrinus dumortieri Lonchocrinus dumortieri de Loriol 1882 Sea lily 5 cups, 1 s primibrachial
Cyrtocrinida - Tetracrinidae	Praetetracrinus bathonicus n. sp. Praetetracrinus bathonicus n. sp. Hess 2012 Sea lily
Millericrinida - Apiocrinitidae	Apiocrinites sp. Apiocrinites sp. Miller 1821 Sea lily 1 pluricolumnal, 14 columnals
Cladida - Cyclocrinidae	Cyclocrinus rugosus Cyclocrinus rugosus d'Orbigny 1841 Sea lily 1 pluricolumnal, 18 columnals
Comatulida - Paracomatulidae	Singillatimetra inordinata n. gen. n. sp. Singillatimetra inordinata n. gen. n. sp. Hess 2012 Feather star
Comatulida - Solanocrinitidae	Palaeocomaster messingi n. sp., Solanocrinites voultensis n. sp., Andymetra galei n. gen. n. sp. Palaeocomaster messingi n. sp. Hess 2012 Feather star Solanocrinites voultensis n. sp. Hess 2012 Feather star Andymetra galei n. gen. n. sp. Hess 2012 Feather star
Echinoidea
-	Echinoidea indet. Echinoidea indet. Leske 1778 sea urchin Scattered fragments
Asteroidea
-	Asteroidea indet. Asteroidea indet. de Blainville 1830 sea star