Bykov Formation
54 distinct taxa, from 152 fossil occurrences the Paleobiology Database records under this name, spanning 101–72 Mya.
Sakhalin · RU
54 taxa · 152 fossils · 101–72 MyaMembers recorded: 10.
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11 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
- Canadoceras kossmati
- Gigantocapulus giganteus
- Yezoites puerculus
- Inoceramus
- Sphenoceramus orientalis
- Eupachydiscus haradai
- Tetragonites glabrus
- Birostrina
- Gaudryceras (Gaudryceras) denseplicatum
- Gaudryceras mamiyai
- Gaudryceras tenuiliratum
- Hypophylloceras (Neophylloceras) ramosum
- Inoceramus hobetsensis
- Inoceramus lamarcki
- Inoceramus teshioensis
- Jimboiceras planulatiforme
- Mytiloides incertus
- Nipponites
- Nipponites mirabilis
- Phyllopachyceras ezoense
- Pseudocenoceras proximum
- Scalarites mihoensis
- Tetragonites popetensis
- Tragodesmoceroides subcostatus
- Anagaudryceras
- Anagaudryceras nanum
- Baculites
- Canadoceras multicostatum
- Cymatoceras bifidum
- Cymatoceras honmai
- Damesites sugata
- Desmoceras (Pseudouhligella) japonicum
- Didymoceras (Eubostrychoceras) japonicum
- Fagesia
- Gaudryceras striatum
- Gaudryceras varagurense
- Hexanchus
- Hyphantoceras (Hyphantoceras) reussianum
- Hyporbulites seresitensis
- Inoceramus apicalis
The 40 most often recorded, of 54.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.