Batu Baraketak mud volcano, Rotti Island (Jurassic to of Indonesia)

Where: Indonesia (10.6° S, 123.3° E: paleocoordinates 32.5° S, 81.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Early/Lower Jurassic to Early/Lower Jurassic (201.3 - 163.5 Ma)

• Specimens are derived from debris cones of mud volcanoes, so are a mixture of Early and Middle Jurassic ammonites and belemnites.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

Size class: macrofossils

Collected by A. Wichmann in 1888-1889

Collection methods: surface (float)

• Repository: Mineralogische-Geologisch Instituut te Utrecht (based on location of Hypocrinus pyriformis in 1913).

Primary reference: A. Rothpletz. 1892. Die Perm-, Trias- und Jura-Formation auf Timor und Rotti im Indischen Archipel. Palaeontographica 39:57-106 [G. Webster/G. Webster]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132795: authorized by Matthew Clapham, entered by Matthew Clapham on 27.08.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Belemnitida - Belemnitidae
Belemnites dicoelus Rothpletz 1892 belemnite
Belemnites gerardi Oppel 1856 belemnite
 Ammonitida - Schlotheimiidae
Schlotheimia sp. Bayle 1878 ammonite
 Ammonitida - Arietitidae
"Arietites sp." = Coroniceras (Arietites) Waagen 1869 ammonite
Arietites wichmanni n. sp. Rothpletz 1892 ammonite
Arietites geometricus Oppel 1856 ammonite
Arietites longicellus Quenstedt 1858 ammonite
"Arietites rotticus n. sp." = Metophioceras rotticus Rothpletz 1892 ammonite
 Ammonitida - Lytoceratidae
Lytoceras sp. Suess 1865 ammonite
 Ammonitida - Hammatoceratidae
 Ammonitida - Coeloceratidae
 Ammonitida - Dactylioceratidae
"Stephanoceras (Coeloceras) cf. braunianum" = Zugodactylites braunianus
"Stephanoceras (Coeloceras) cf. braunianum" = Zugodactylites braunianus d'Orbigny 1844 ammonite
 Ammonitida - Hildoceratidae
Harpoceras cf. eseri Oppel 1856 ammonite