PBDB Collection

Zygospiraella duboisi-Mendacella mullockiensis Comm., Saelabonn Fm. (Silurian of Norway)

Where: Norway (60.2° N, 10.3° E: paleocoordinates 26.5° S, 9.1° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Saelabonn Formation, Rhuddanian (443.4 - 440.8 Ma)

• Type locality in Store Svartoya Member. Other locality is in Djupvarp Member.

• formation-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal carbonate

• "...calm, open marine, microtidal, shallow, commonly swept by storms, transitional to a barrier or interbarrier system in shoreface region...blue-green alga...micritized shell fragments...The general environment seems to suggest BA 3 to 2 [but certain elements present here, such as Clorinda, are known to extend deeper]. Thus a BA 1 to 5 assignment might be indicated."

• "Shells commonly occur in swell-lags, which means concentration without long-distance transport."

Primary reference: B. G. Baarli, H. B. Keilen, and M. E. Johnson. 1999. Silurian communities of the Oslo Region, Norway. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 327-349 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 14322: authorized by Michael Foote, entered by Michael Foote on 30.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Some taxa not reported to genus level.

Show authors, comments, and common names

Crinoidea
-	Crinoidea indet. Crinoidea indet. Miller 1821 Sea lily
Gastropoda
-	Gastropoda indet. Gastropoda indet. Cuvier 1795 snail
Rhynchonellata
Pentamerida - Clorindidae	"Clorinda undata" = Clorilamnulella undata "Clorinda undata" = Clorilamnulella undata de Sowerby and Murchison 1839
Rhynchonellida -	Rhynchonellida indet. Rhynchonellida indet. Kuhn 1949
Rhynchonellida - Trigonirhynchiidae	Rostricellula sp. Rostricellula sp. Ulrich and Cooper 1942
Atrypida - Atrypinidae	Eospirigerina gaspeensis Eospirigerina gaspeensis Schuchert and Cooper 1930
Atrypida -	Zygospiraella duboisi Zygospiraella duboisi Verneuil 1845
Orthida - Rhipidomellidae	Mendacella mullockiensis Mendacella mullockiensis Davidson 1869
Orthida - Dalmanellidae	"Isorthis prima" = Levenea llandoveriana "Isorthis prima" = Levenea llandoveriana Williams 1951
Strophomenata
Strophomenida - Leptostrophiidae	"Mesoleptostrophia reedi" = Leptostrophia reedi, "Aphanomena mullochensis" = Eostropheodonta mullochensis "Mesoleptostrophia reedi" = Leptostrophia reedi Bancroft 1949 "Aphanomena mullochensis" = Eostropheodonta mullochensis Reed 1917
Strophomenida - Rafinesquinidae	"Leptaena haverfordensis" = Leptaena (Leptaena) haverfordensis "Leptaena haverfordensis" = Leptaena (Leptaena) haverfordensis Bancroft 1949
Strophomenida - Furcitellidae	Katastrophomena scotica Katastrophomena scotica Bancroft 1949
Orthotetida - Chilidiopsidae	Fardenia cf. columbana Fardenia cf. columbana

Lophophorata -	Tentaculitida indet. Tentaculitida indet. Ljaschenko 1955
Stenolaemata
Trepostomata - Halloporidae	Hallopora cf. elegantula Hallopora cf. elegantula Hall 1851
Cryptostomata - Rhinidictyidae	Metadictya cingularis Metadictya cingularis
Cryptostomata - Ptilodictyidae	Ptilodictya lanceolata Ptilodictya lanceolata Goldfuss 1829
Cryptostomata - Arthrostylidae	Moyerella robusta Moyerella robusta
Trilobita
Proetida - Proetidae	Proetus sp. Proetus sp. Steininger 1831 trilobite
Corynexochida - Illaenidae	Bumastus sp. Bumastus sp. Murchison 1839 trilobite
Phacopida - Calymenidae	Calymene cf. lata Calymene cf. lata trilobite
Ostracoda
Hollinocopida - Euprimitiidae	Primitiella bipunctata Primitiella bipunctata ostracod ostracode; genus name in quotes
Anthozoa
Rugosa -	Rugosa indet. Rugosa indet. horn coral
Stauriida - Streptelasmatidae	Helicelasma sp. Helicelasma sp. Neuman 1969 horn coral