Named is from the Latin name (Bajocae) of the town of Bayeux, in the region of Normandy in France, introduced by French palaeontologist Alcide d'Orbigny in 1842.

GSSP:

Murtinheira Section, Cabo Mondego, Portugal

GSSP location:

40.1992°N, 8.9042°W

GSSP link:

View Global Boundary Stratotype Section and Point of the International Commission on Stratigraphy

Fossil Record

Data via PaleoBioDB

Taxa Count Key

First appearance

Extinction

First appearance and extinction

Related precursors

Kingdom	Phylum	Class	Taxa Count
Animalia	Annelida	Clitellata	3
Animalia	Annelida	Polychaeta	32
Animalia	Arthropoda	Arachnida	30
Animalia	Arthropoda	Branchiopoda	14
Animalia	Arthropoda	Cephalocarida	1
Animalia	Arthropoda	Chilopoda	3
Animalia	Arthropoda	Diplopoda	4
Animalia	Arthropoda	Entognatha	1
Animalia	Arthropoda	Insecta	770
Animalia	Arthropoda	Malacostraca	157
Animalia	Arthropoda	Maxillopoda	8
Animalia	Arthropoda	Merostomata	1
Animalia	Arthropoda	Ostracoda	111
Animalia	Arthropoda	Pycnogonida	1
Animalia	Arthropoda	Remipedia	1
Animalia	Brachiopoda	Craniata	4
Animalia	Brachiopoda	Lingulata	17
Animalia	Brachiopoda	Rhynchonellata	704
Animalia	Brachiopoda	Strophomenata	12
Animalia	Bryozoa	Gymnolaemata	19
Animalia	Bryozoa	Stenolaemata	44
Animalia	Chordata	Actinopterygii	16
Animalia	Chordata	Amphibia	14
Animalia	Chordata	Ascidiacea	1
Animalia	Chordata	Cephalaspidomorphi	1
Animalia	Chordata	Elasmobranchii	40
Animalia	Chordata	Holocephali	3
Animalia	Chordata	Mammalia	42
Animalia	Chordata	Myxini	1
Animalia	Chordata	Reptilia	181
Animalia	Chordata	Sarcopterygii	8
Animalia	Cnidaria	Anthozoa	321
Animalia	Cnidaria	Cubozoa	1
Animalia	Cnidaria	Hydrozoa	4
Animalia	Cnidaria	Scyphozoa	2
Animalia	Echinodermata	Asteroidea	54
Animalia	Echinodermata	Crinoidea	28
Animalia	Echinodermata	Echinoidea	94
Animalia	Echinodermata	Holothuroidea	78
Animalia	Echinodermata	Ophiuroidea	39
Animalia	Hemichordata	Enteropneusta	4
Animalia	Hemichordata	Pterobranchia	2
Animalia	Mollusca	Bivalvia	560
Animalia	Mollusca	Cephalopoda	400
Animalia	Mollusca	Gastropoda	482
Animalia	Mollusca	Monoplacophora	1
Animalia	Mollusca	Polyplacophora	11
Animalia	Mollusca	Scaphopoda	13
Animalia	Nematoda	Adenophorea	2
Animalia	Nematoda	Secernentea	2
Animalia	Porifera	Calcarea	10
Animalia	Porifera	Demospongiae	25
Animalia	Porifera	Hexactinellida	14
Bacteria	Cyanobacteria	Cyanophyceae	6
Chromista	Foraminifera	Globothalamea	96
Chromista	Foraminifera	Monothalamea	30
Chromista	Foraminifera	Tubothalamea	44
Chromista	Haptophyta	Prymnesiophyceae	35
Chromista	Myzozoa	Dinophyceae	38
Chromista	Ochrophyta	Phaeophyceae	2
Chromista	Radiozoa	Polycystina	550
Plantae	Bryophyta	Bryopsida	3
Plantae	Charophyta	Charophyceae	4
Plantae	Charophyta	Zygnematophyceae	1
Plantae	Chlorophyta	Chlorophyceae	3
Plantae	Chlorophyta	Trebouxiophyceae	2
Plantae	Chlorophyta	Ulvophyceae	37
Plantae	Marchantiophyta	Marchantiopsida	5
Plantae	Rhodophyta	Florideophyceae	11
Plantae	Rhodophyta	Rhodophyceae	4
Plantae	Tracheophyta	Cycadopsida	23
Plantae	Tracheophyta	Ginkgoopsida	11
Plantae	Tracheophyta	Gnetopsida	5
Plantae	Tracheophyta	Lycopodiopsida	19
Plantae	Tracheophyta	Magnoliopsida	8
Plantae	Tracheophyta	Pinopsida	52
Plantae	Tracheophyta	Polypodiopsida	55

The base of the Bajocian stage is defined as the place in the stratigraphic column where fossils of the ammonite genus Hyperlioceras first appear.

The top of the Bajocian (the base of the Bathonian) is at the first appearance of ammonite species Parkinsonia convergens.

Geologic Events

Event Name	Type	Age	Area
Pangaea breakup (ongoing)	Continental Breakup	175 - 55 Ma	Global
Andean orogeny (ongoing)	Orogeny	Maximum Age: 200 Ma	South America
Laurasia supercontinent (ongoing)	Supercontinent	215 - 55 Ma	Northern Hemisphere

Overview of geological time

List all geological events

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