Q2-h-158, near the road, 3.5 km southeast of Chenmajiging, Zhongning (Carboniferous of China)

Also known as Angyomphalus-Glabrocingulum assemblage, Tsingyuan Fm. (Lower Mbr.), Ningxia, Chi

Where: Ningxia, China (37.5° N, 105.7° E: paleocoordinates 9.9° N, 66.6° E)

• coordinate estimated from map

When: Eumorphoceras zone, Lower Member (Tsingyuan Formation), Arnsbergian (326.4 - 318.1 Ma)

• Eumorphoceras = top of Arnsbergian;

•"This assemblage is associated with the ammonoids Dombarites paratectus and Cravenoceous arcticun, which are considered equivalent to the upper part of West European E, zone or Nmlb of pre-Russian (Ruan and Zhou, 1987). The conodonts Gnathodus bilinensis bilinensis, Paragnathodus commutadus, and P. mononodosus also occur; they characterize the West European E (Eumorphoceras) zone (Wang 1987)."

• member-level stratigraphic resolution

Environment/lithology: marine; gray sandstone and shale

• "The Lower Mbr. consists mainly of dark grey shale intercalated with thin beds of fine-grained sandstone and argillaceous limestone."

Collection methods: "These specimens weathered out of an argillaceous limestone."

Primary reference: H. Pan. 1997. Namurian (Lower Carboniferous) gastropod assemblages from Ningxia, China. Journal of Paleontology 71(4):599-609 [J. Alroy/M. Sommers/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 671: authorized by John Alroy, entered by Mike Sommers on 17.02.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• Primarily gastropods, some ammonoids and conodonts thrown in.
Conodonta
 Ozarkodinida - Idiognathodontidae
Gnathodus bilinensis conodont
bilinensis
 Ozarkodinida -
"Paragnathodus mononodosus" = Lochriea, "Paragnathodus commutatus" = Lochriea commutata
"Paragnathodus mononodosus" = Lochriea conodont
"Paragnathodus commutatus" = Lochriea commutata Branson and Mehl 1941 conodont
Cephalopoda
 Goniatitida - Cravenoceratidae
Cravenoceras arcticum Librovitch 1938 ammonite
spelt "arcticun" and "arctium"
 Goniatitida - Delepinoceratidae
Dombarites paratectus Ruzhentsev and Bogoslovskaya 1971 ammonite
Gastropoda
 Murchisoniina - Phymatopleuridae
"Glabrocingulum tongxinensis" = Worthenia tongxinensis
"Glabrocingulum tongxinensis" = Worthenia tongxinensis Guo 1983 snail
 Murchisoniina - Gosseletinidae
 Murchisoniina - Portlockiellidae
 Murchisoniina - Soleniscidae
Leptoptygma cf. golconda Thein and Nitecki 1974 snail
 Murchisoniina - Murchisoniidae
"Ectomaria yunnanensis" = Micrentoma yunnanensis
"Ectomaria yunnanensis" = Micrentoma yunnanensis Mansuy 1919 snail
given as Eotomaria yunnanensis in table, but Ectomaria in text.
 Cerithimorpha - Orthonemidae
"Stegocoelia (Hypergonia) kirkbyi" = Hypergonia kirkbyi
"Stegocoelia (Hypergonia) kirkbyi" = Hypergonia kirkbyi Donald 1892 snail
[entered as Stegocoelia (Hypergonia) lirkbyi]
 Caenogastropoda - Meekospiridae
Meekospira peracuta Meek and Worthen 1860 snail
[misspelled as Meekospira pevacuta on list]
 Bellerophontida - Tropidodiscidae
Sinuitina sp. Knight 1945 snail
 Bellerophontida - Bellerophontidae
Retispira exilis de Koninck 1883 snail
Retispira hibernicus Weir 1931 snail
Retispira qingshuihensis Guo 1983 snail
Retispira ningxiaensis Guo 1983 snail
 Bellerophontida - Euphemitidae