Muller 714B, 714C-D, 714D, 725 (Jurassic of the United States)

Where: Nevada (41.6° N, 118.6° W: paleocoordinates 24.4° N, 55.7° W)

• coordinate based on nearby landmark

When: Sunrise Formation, Sinemurian (199.3 - 190.8 Ma)

• From Poulton, 1979 ; "Field number 714C-D (collected by S.W. Muller, Stanford University) indicates that it was obtained from division 8 of Muller and Ferguson (1939, p. 1611, 1612), which also contains Eoderoceras Spath. This ammonite genus is Late Sinemurian (Imlay, 1968)"

Environment/lithology: marine; limestone and medium-grained, gray sandstone

• From Poulton, 1979:

•USNM 219929, from 714B in limestone which could be termed 'oolitic' as Muller and Ferguson (1939) described Unit 6

•USNM 219934, 219935, from 714D "occur in medium-grained, grey to pink 'greywacke'."

Size classes: macrofossils, mesofossils

Collected by S.W. Muller; reposited in the USNM

Primary reference: T. P. Poulton. 1979. Jurassic Trigoniid Bivalves from Canada and Western United States of America. Geological Survey of Canada Bulletin 282 [G. Stanley/H. Shepherd/H. Shepherd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 139744: authorized by George Stanley, entered by Hannah Shepherd on 16.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Trigoniida - Trigoniidae
Trigonia aff. hemisphaerica Lycett 1877 clam
Holotype USNM 219927 from 714C-D
 Trigoniida - Myophorelloidae
Frenguelliella "sp. C" Leanza 1942 clam
Hypotype USNM 219928 from 714D, A-E
Frenguelliella "sp. D" Leanza 1942 clam
Hypotype USNM 219929 from 714B
Jaworskiella siemonmulleri n. sp. Poulton 1979 clam
Holotype USNM 219930, Paratypes USNM 219931-219933
Vaugonia cf. vancouverensis Poulton 1976 clam
Hypotypes USNM 219934, 219935 from 714-D