Mapia River 80D245 (Permian of Indonesia)

Where: Irian Jaya, Indonesia (4.1° S, 135.8° E: paleocoordinates 40.8° S, 130.5° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Aiduna Formation, Artinskian (290.1 - 279.3 Ma)

• Float boulder. Aktastinian to early Baigendzhinian = early Artinskian.

• bed-level stratigraphic resolution

Environment/lithology: marine; micaceous sandstone and carbonaceous siltstone

• Aiduna Formation includes well bedded feldspathic and micaceous lithic sandstones interbedded with carbonaceous shale and siltstone.

Size class: macrofossils

Preservation: mold/impression, original calcite

Collection methods: bulk, chemical, mechanical,

• Some acid leaching was conducted.

Primary reference: N. W. Archbold. 1991. Early Permian Brachiopoda from Irian Jaya. BMR Journal of Australian Geology & Geophysics 12:287-296 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42907: authorized by David Bottjer, entered by Matthew Clapham on 06.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopods only.
Strophomenata
 Strophomenida - Rugosochonetidae
Neochonetes (Sommeriella) irianensis n. sp.
1 DV int. mould, 3 DV ext. mould, 6 VV int. mould, 8 VV ext. mould
Sulcataria skwarkoi n. sp.
1 DV int. mould, 2 DV ext. mould, 2 VV ext. mould
Chonetinella aidunaensis n. sp.
6 DV int. mould, 2 DV ext. mould, 4 VV int. mould, 2 VV ext. mould
 Productida - Productellidae
Stictozoster sp. Grant 1976
1 DV ext. mould
 Productida - Linoproductidae
Cancrinella sp.
1 VV int. mould (juvenile)
 Productida - Strophalosiidae
Heteralosia sp. King 1938
1 DV ext. mould, 1 VV int. mould
Echinalosia sp. Waterhouse 1967
1 DV int. mould + corresponding ext. mould
 Productida - Aulostegidae
Aulosteges tenuispinosus n. sp.
1 DV ext. mould (juvenile)
Rhynchonellata
 Spiriferinida -
 Spiriferinida - Spiriferellinidae
 Spiriferinida - Syringothyrididae
Syringothyrididae indet. Fredericks 1926
2 spp.
 Spiriferida - Trigonotretidae
Neospirifer sp. Fredericks 1919