PBDB Collection

M405/186, M405/187, M24-1, Sample 893. Dvortsy; Tommotion Stratotype (Cambrian of Russian Federation)

Also known as = Gastropoda of Siberia, Locality (1) - Aldan River, Dvortsy - Layer 15

Where: Yakutia, Russian Federation (58.8° N, 128.0° E: paleocoordinates 11.0° S, 15.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Aldanocyathus sunnaginicus other zone, Pestrotsvet Formation, Tommotian (525.5 - 521.0 Ma)

• Lower Tommotian; given as Ajacicyathus sunnaginicus-Tiksitheca licis zone, Layer 1 in Rozanov et al.

• bed-level stratigraphic resolution

Environment/lithology: glauconitic, gray, green limestone and claystone

• Light gray, gray, greenish limestones with glauconite increasing toward the base of the member, where the rock comprises crushed shells mixed with glauconite and sandy material. The proportion of clayey material increases up section, the rock becomes gradually red.

Size classes: mesofossils, microfossils

Preservation: replaced with phosphate

Collection methods: bulk, chemical,

Primary reference: A. Y. Rozanov, V. V. Missarzhevsky, N. A. Volkova, L. G. Voronova, I. N. Krylov, B.M. Keller, I. K. Korolyuk, K. Lendzion, R. Mikhnyar, N. G. Pykhova, and A. D. Sidorov. 1969. Tommotskiu jarus i problema nizhney granisty kembriya [The Tommotian Stage and the Cambrian lower Boundary problem]. Trudy Geoligske Institut Leningrad 206:1-379 [P. Wagner/P. Wagner/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45847: authorized by Martin Aberhan, entered by Sabine Nürnberg on 10.12.2004, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	Cryptaporacyathus juniacanensis, Okulitchchicyathus disciformis, Annulatopsophosphaera sp., Uniporata rotunda, Uniporata tuberculata, Uniporata simplex, Polyforama verrucosa Cryptaporacyathus juniacanensis Okulitchchicyathus disciformis Annulatopsophosphaera sp. Uniporata rotunda Uniporata tuberculata Uniporata simplex Polyforama verrucosa

Hyolithelminthida - Hyolithellidae	Hyolithellus grandis, Hyolithellus vladimirovae, Hyolithellus tenuis Hyolithellus grandis Rozanov et al. 1969 Hyolithellus vladimirovae Rozanov and Missarzhevsky 1966 Hyolithellus tenuis Rozanov and Missarzhevsky 1966
Hyolithelminthida - Torellellidae	Torellella curvae Torellella curvae
Scyphozoa
Anabaritida - Anabaritidae	Tiksitheca licis, Cambrotubulus decurvatus Tiksitheca licis Rozanov et al. 1969 jellyfish Cambrotubulus decurvatus Rozanov et al. 1969 jellyfish
Coleolus
- Coleolidae	Coleolus trigonis Coleolus trigonis
Tumulduria
-	Tumulduria indistincta Tumulduria indistincta
Coleoloides
-	Coleoloides trigeminatus Coleoloides trigeminatus
Coeloscleritophora
Chancelloriida - Chancelloriidae	Chancelloria sp. Chancelloria sp. Walcott 1920
Archaeocyatha
Archaeocyathida - Archaeocyathidae	"Cambrocyathus tschuranicus" = Pycnoidocyathus (Cambrocyathus) "Cambrocyathus tschuranicus" = Pycnoidocyathus (Cambrocyathus) archaeocyath sponge
Archaeocyathida - Loculicyathidae	"Robustocyathus belvederi" = Cambrocyathellus "Robustocyathus belvederi" = Cambrocyathellus archaeocyath sponge
Monocyathida - Monocyathidae	Archaeolynthus polaris Archaeolynthus polaris archaeocyath sponge
Ajacicyathida - Ajacicyathidae	Ajacicyathus virgathus, Ajacicyathus tkatschenkoi, Nochoroicyathus aldanicus, "Ajacicyathus sunnaginicus" = Nochoroicyathus sunnaginicus Ajacicyathus virgathus archaeocyath sponge Ajacicyathus tkatschenkoi archaeocyath sponge Nochoroicyathus aldanicus archaeocyath sponge "Ajacicyathus sunnaginicus" = Nochoroicyathus sunnaginicus Zhuravleva 1960 archaeocyath sponge
Ajacicyathida - Dokidocyathidae	Dokidocyathus sp. Dokidocyathus sp. Taylor 1910 archaeocyath sponge
Hyolitha
Orthothecida - Circothecidae	Laratheca nana Laratheca nana Rozanov et al. 1969
Orthothecida -	Turcutheca annae, Turcutheca crasseocochlia, Turcutheca rugata, "Turcutheca cotuiensis" = Khetatheca cotuiensis Turcutheca annae Syssoiev 1959 Turcutheca crasseocochlia Syssoiev 1962 Turcutheca rugata Syssoiev 1959 "Turcutheca cotuiensis" = Khetatheca cotuiensis Syssoiev 1959
Orthothecida - Allathecidae	Allatheca sp., "Egdetheca aldanica" = Exilitheca Allatheca sp. Rozanov et al. 1969 "Egdetheca aldanica" = Exilitheca
Orthothecimorpha
Circothecida -	"Coleolella billingsi" = Spinulitheca billingsi "Coleolella billingsi" = Spinulitheca billingsi Syssoiev 1962
Brachiopoda
Tommotiida - Sunnaginiidae	Sunnaginia imbricata Sunnaginia imbricata Rozanov et al. 1969
Mitrosagophora - Tommotiidae	Camenella grabowskae, "Camena kozlowskii" = Camenella kozlowskii, "Camena admiranda" = Camenella admiranda Camenella grabowskae "Camena kozlowskii" = Camenella kozlowskii Rozanov and Missarzhevsky 1966 "Camena admiranda" = Camenella admiranda Rozanov and Missarzhevsky 1966
Barskovia
- Khairkhaniidae	Barskovia sp.², Barskovia jucunda n. sp.¹ Barskovia sp.² Golubev 1976 Barskovia jucunda n. sp.¹ Bokova 1990 Not explicitly stated, but only possible match.
Helcionelloida
Helcionellida - Helcionellidae	Bemella jacutica², Bemella parula², Bemella septata² Bemella jacutica² Rozanov and Missarzhevsky 1966 Bemella parula² Rozanov et al. 1969 Bemella septata² Rozanov and Missarzhevsky 1966
Pelagiellida - Aldanellidae	"Aldanella rozanovi" = Aldanella attleborensis² "Aldanella rozanovi" = Aldanella attleborensis² Shaler and Foerste 1888

¹Bokova 1990; ²Zhegallo 1983