Cerro Mesa: Agrio Fm (Cretaceous of Argentina)

Where: Neuquen, Argentina (38.7° S, 69.9° W: paleocoordinates 38.2° S, 33.7° W)

• coordinate stated in text

When: Agrio Formation (Mendoza Group), Early/Lower Hauterivian (136.4 - 130.0 Ma)

Environment/lithology: shoreface; lithified, silty, calcareous sandstone and gray, green shale

• fine to coarse-grained sandstones and siltstones with carbonate cement, interbedded with greenish-gray shales containing mostly reworked bivalves, gastropods .... Lenses of coquinoid limstones are also common

Size class: macrofossils

Primary reference: E.G. Kauffman and H.A. Leanza. 2004. A Remarkable New Genus of Mytilidae (Bivalvia) from the Lower Cretaceous of Southwestern Gondwanaland. Journal of Paleontology 78(6):1187-1191 [L. Ivany/P. Wall/P. Wall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 47202: authorized by Linda Ivany, entered by Patrick Wall on 18.02.2005, edited by Sabine Nürnberg

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
  -
Anthozoa indet. Ehrenberg 1834
Polychaeta
 Sabellida - Serpulidae
Serpulidae indet. Rafinesque 1835
Bivalvia
 Mytilida - Mytilidae
Nodomytilus trigonimimus n. gen. n. sp.
Nodomytilus trigonimimus n. gen. n. sp. Kauffman and Leanza 2004 mussel
 Ostreida - Bakevelliidae
Gervillaria alaeformis Sowerby 1819 oyster
 Ostreida - Pinnidae
Pinna robinaldina d'Orbigny 1844 oyster
 Pectinida - Pectinoidae
 Arcida - Cucullaeidae
 Carditida - Astartidae
Eriphyla argentina Burckh and Weaver 1907 clam
 Carditida - Crassatellidae
 Hiatellida - Hiatellidae
 Pholadomyida - Pholadomyidae
Pholadomya gigantea Sowerby 1836 clam
 Cardiida - Kalenteridae
 Trigoniida - Myophorelloidae
"Steinmanella (Macrotrigonia) pehuenmapuensis" = Neuquenella pehuenmapuensis Leanza 1998 clam
 Trigoniida - Megatrigonioidae
 Trigoniida - Trigoniidae
"Pholadomya agrioensis" = Rutitrigonia agrioensis Weaver 1931 clam
Gastropoda
 Heterostropha - Acteonidae
 Sorbeoconcha - Tylostomatidae
 Sorbeoconcha - Naticidae
 Cerithioidea - Turritellidae
Turritella aff. lineolata Roemer 1841 turret shell
 Cerithioidea - Cerithiidae
Cerithium cf. heeri cerith snail
 Pleurotomarioidea - Pleurotomariidae
Cephalopoda
 Ammonitida - Holcodiscidae
Holcoptychites neuquensis Douvillé 1910 ammonite
 Ammonitida - Neocomitidae
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
originally entered as "Crinoida indet."
Echinoidea
  -
Echinoidea indet. Leske 1778 sea urchin