Loc. Zhavanets 39 [Rykhta Fm] (Silurian of Ukraine)

Where: Ukraine (48.5° N, 26.5° E: paleocoordinates 21.4° S, 7.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Grinchuk Member (Rykhta Formation), Ludlow (427.4 - 423.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Grinchuk Mbr of the Rykhta Fm, which is overlain by the Isakovtsy Mbr of the same formation, and overlies the Bernovo Mbr of the Tsviklevtsy Fm (Ludlow). AGE: Ludlow, Silurian on the basis of graptolite biostratigraphy, Uncinatograptus caudatus-Monograptus balticus Zone = Upper Ludlow. STRATIGRAPHIC POSITION: From layer of marl, approx. 1 m above the water level.

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified marl and lithified limestone

• ENVIRONMENT: Coral rich facies, carbonate, hence probably coral buildup environment.
• SPECIFIC LITHOLOGY: Marl, within nodular limestone. LITHIFICATION: Lithified, assumed on the basis of age, facies description and figured specimens.

Size classes: macrofossils, mesofossils

Collection methods: peel or thin section, acetic,

• COLLECTOR: O. Vinn and A.-M. Motus. REPOSITORY: Institute of Geology, University of Technology, Tallnin, Ehitajate, Ukraine. (GIT).

Primary reference: O. Vinn and M.-A. Motus. 2008. The earliest endosymbiotic mineralized tubeworms from the Silurian of Podolia, Ukraine. Journal of Paleontology 82(2):409-414 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 79781: authorized by Austin Hendy, entered by Austin Hendy on 23.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Only includes characterstic coral taxa and endobiont fauna. NOMENCLATURE: Authoritative publication with species-resolution taxonomic assignments.
Lophophorata
 Tentaculitida - Cornulitidae
Coralloconchus bragensis Vinn and Motus 2008
Anthozoa
 Favositida - Favositidae
Favosites gothlandicus Lamarck 1816 tabulate coral
 Heliolitida - Heliolitidae
Heliolites sp. Dana 1846 tabulate coral
 Heliolitida - Stelliporellidae
Syringoheliolites sp. Bondarenko 1971 tabulate coral
 Heliolitida - Halysitidae