Late Emsian/Eifelian Loc. 25 of Melo: Maecuru River (Devonian of Brazil)

Where: Para, Brazil (2.0° S, 54.0° W: paleocoordinates 68.9° S, 29.4° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Alpenachitina eisenacki other zone, Lontra Member (Maecuru Formation), Eifelian (393.3 - 387.7 Ma)

• Member spans Emsian - Eifelian, but the dense beds of shelly fossils are from the top of the formation (Grahn 2005).

• member-level stratigraphic resolution

Environment/lithology: marine; sandstone and bioturbated siltstone

• Deposition reflects deepening. See lithology description.
• "The Maecuru Fm. of Emsian/Eifelian age is composed by the Jatapu and Lontra members...Jatapu [consists of] bioturbated silty/shaly layers and argillaceous sandstones...Fluvial sandstones and conglomerates are the main constituents of the Lontra unit. However, locally on the N flank and throughout the subsurface the uppermost Lontra sediments are shallow marine "tempestites", i.e. hummocky cross-stratified sandstones containing the well known Devonian invertebrate fauna recorded by pioneer workers from outcrops of the Maecuru and Curua rivers."

Size class: macrofossils

Preservation: cast

Primary reference: J. H. G. Melo. 1988. The Malvinokaffric realm in the Devonian of Brazil. N. J. McMillan, A. F. Embry, and D. J. Glass, eds. Devonian of the World, Volume I. Canadian Society of Petroleum Geologists. Calgary, Alberta, Canada 669-703 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 37137: authorized by Michael Foote, entered by Michael Foote on 03.03.2004, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
  -
Trilobita indet. Walch 1771 trilobite
"Clarke's (1890) 'Acidaspis? or Ceraurus?' "
 Phacopida -
Phacopida indet. Salter 1864 trilobite
 Phacopida - Dalmanitidae
"Dalmanites" sp. Barrande 1852 trilobite
" 'Dalmanites' (gen.indet., cf. Odontochile or Gamonedaspis)"
 Phacopida - Homalonotidae
? Trimerus sp. Green 1832 trilobite
Polychaeta
 Serpulimorpha -
Bivalvia
 Pectinida - Pterinopectinidae
Pseudaviculopecten sp. Newell 1938 scallop
 Ostreida - Pterineidae
Leptodesma (Leiopteria) sp., "Ptychopteria (Actinopteria) sp." = Actinopteria
"Ptychopteria (Actinopteria) sp." = Actinopteria Hall 1884 oyster
 Carditida - Crassatellidae
? Cypricardella sp. Hall 1856 clam
 Cardiidia - Sanguinolitidae
""Sphenotus" sp." = Sanguinolites
""Sphenotus" sp." = Sanguinolites M'Coy 1844 clam
 Cardiidia - Grammysiidae
Cimitaria sp. Hall and Whitfield 1869 clam
Grammysia sp. de Verneuil 1847 clam
? Grammysioidea sp. Williams 1916 clam
 Modiomorphida - Modiomorphidae
Modiomorpha sp. Hall and Whitfield 1869 clam
? Guerangeria sp. Oehlert 1880 clam
 Trigoniida -
 Nuculida - Nuculidae
Nuculoidea sp. Williams and Berger 1916 nut clam
 Protobranchia - Malletiidae
Nuculites sp. Conrad 1841 clam
Palaeoneilo sp. Hall and Whitfield 1869 clam
Gastropoda
 Euomphalina - Platyceratidae
Platyceras (Platyceras) sp. Conrad 1840 snail
Platyceras (Platyostoma) sp. Conrad 1842 snail
 Bellerophontida -
Bellerophontoidea indet. M'Coy 1851 snail
 Bellerophontida - Plectonotidae
Plectonotus sp. Clarke 1899 snail
Ptomatis sp. Clarke 1899 snail
 Bellerophontida - Bucaniidae
"Bucania" sp. Hall 1847 snail
 Bellerophontida - Bucanellidae
? Bucanella sp. Meek 1871 snail
Tentaculita
 Styliolinida - Styliolinidae
Styliolina sp. Karpinsky 1884
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Pteraspidomorphi
 Pteraspidiformes - Pteraspididae
? Pteraspis sp. jawless fish
Chondrichthyes
 Acanthodei - Acanthoessidae
? Machaeracanthus sp. Newberry 1857 shark
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
 Monobathrida -
? Ctenocrinus sp. Bronn 1840 Sea lily
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculites sp. von Schlotheim 1820
Strophomenata
 Productida - Productellidae
 Productida - Anopliidae
 Productida -
"Chonetacea "gen.nov. A"" = Chonetoidea, "Chonetacea indet." = Chonetoidea
"Chonetacea "gen.nov. A"" = Chonetoidea Bronn 1862
"Chonetacea indet." = Chonetoidea Bronn 1862
"various definite species"
 Orthotetida - Schuchertellidae
 Strophomenida - Leptostrophiidae
 Strophomenida - Strophodontidae
""Stropheodonta" sp." = Strophomena (Strophodonta) Hall 1852
Megastrophia sp. Caster 1939
Rhynchonellata
 Terebratulida - Centronellidae
 Terebratulida - Meganterididae
? Podolella sp., "? Paranaia sp." = Derbyina
? Podolella sp.
"possibly Cranaena"
"? Paranaia sp." = Derbyina
 Spiriferinida - Cyrtinidae
? Cyrtina sp. Davidson 1858
 Spiriferida -
"Spiriferacea indet." = Spiriferoidea
"Spiriferacea indet." = Spiriferoidea King 1846
"various definite species"
 Spiriferida - Ambocoeliidae
 Spiriferida - Mucrospiriferidae
? Mucrospirifer sp. Grabau 1931
"mostly 'Spirifer' pedroanus Rathbun 1874 and related forms"
 Spiriferida - Acrospiriferidae
Acrospirifer sp. Wedekind 1926
 Rhynchonellida - Leptocoeliidae
 Rhynchonellida - Camarotoechiidae
? Camarotoechia sp. Hall and Clarke 1893
 Rhynchonellida - Rhynchonellidae
"Rhynchonella" sp. Fischer 1809
  - Tropidoleptidae
 Orthida - Rhipidomellidae
Discomyorthis sp. Johnson 1970
 Orthida - Platyorthidae
Anthozoa
 Favositida - Micheliniidae
Pleurodictyum sp. Goldfuss 1829 tabulate coral