W1290, Section 12, Mugu-Popa Trail, Karnali (Permian of Nepal)

Where: Nepal (29.6° N, 83.8° E: paleocoordinates 50.7° S, 62.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Nisal Member (Senja Formation), Changhsingian (254.2 - 252.2 Ma)

• Correlation is difficult, but stratigraphic position suggests Changhsingian age.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Preservation: cast, original calcite

Collection methods: bulk,

• Some collections were of individual specimens, others as large as possible under the circumstances, with a few localities represented by rock weighing more than 50 kg. Most collections were made from just over 50 measured sections, and are under good stratigraphic control.

Primary reference: J. B. Waterhouse. 1978. Permian Brachiopoda and Mollusca from north-west Nepal. Palaeontographica Abteilung A 160(1-6):1-175 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 43194: authorized by David Bottjer, entered by Matthew Clapham on 10.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Myalinida - Myalinidae
Myalinidae indet. Frech 1891 clam
 Pectinida - Aviculopectinidae
? Clavicosta rugatula Waterhouse 1978 scallop
 Pectinida - Heteropectinidae
Etheripecten sp. Waterhouse 1963 scallop
Strophomenata
 Productida - Productellidae
Productina indet. Sutton 1938
 Productida - Strophalosiidae
Marginalosia kalikotei Waterhouse 1975
 Productida - Aulostegidae
Megasteges nepalensis Waterhouse 1975
Rhynchonellata
 Spiriferida - Spiriferellidae
"Spiriferella oblata n. sp." = Arcullina oblata
"Spiriferella oblata n. sp." = Arcullina oblata Waterhouse 1978
 Spiriferida - Trigonotretidae
"Neospirifer ravaniformis" = Betaneospirifer ravaniformis
"Neospirifer ravaniformis" = Betaneospirifer ravaniformis Waterhouse 1978
 Spiriferida - Elythidae
 Athyridida - Athyrididae
? Spirigerella sp. Waagen 1883
 Terebratulida - Beecheriidae
Hoskingia dieneri Waterhouse 1978
 Terebratulida - Dielasmatidae
Dielasmatidae "indet. A" Schuchert 1913
 Terebratulida - Cryptonellidae
? Heterelasma sp. Girty 1908