# List of the prehistoric life of Massachusetts

This list of the prehistoric life of Massachusetts contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Massachusetts.

## Precambrian

The Paleobiology Database records no known occurrences of Precambrian fossils in Massachusetts.

## Paleozoic

* Fossil of the Cambrian trilobite Agraulos †Agraulos – report made of unidentified related form or using admittedly obsolete nomenclature
** †Agraulos quadrangularis
* †Aldanella
** †Aldanella attleborensis
* †Allatheca – report made of unidentified related form or using admittedly obsolete nomenclature
** †Allatheca degeeri – broadly construed
* †Anabarites
** †Anabarites korobovi
* †Bemella
** †Bemella bella
* †Braintreella
** †Braintreella rogersi
* †Calodiscus
** †Calodiscus lobatus
* †Camenella
** †Camenella baltica – tentative report
* Fossil of Chancelloria †Chancelloria
* †Coleoloides
** †Coleoloides typicalis
* †Condylopyge
* †Conotheca
** †Conotheca subcurvata
* †Dawsonia
** †Dawsonia dawsoni – or unidentified comparable form
* †Dipharus
** †Dipharus attleborensis
* †Dromopus – tentative report
** †Dromopus woodworthi – type locality for species
* †Eccentrotheca
** †Eccentrotheca kanesia
* †Fomitchella
** †Fomitchella infundabiliformis
* †Gracilitheca
** †Gracilitheca bayonet
* Fossil of the Cambrian mollusc Halkieria. †Halkieria
* †Hyolithellus
** †Hyolithellus micans – or unidentified related form
* †Hyolithes
** †Hyolithes tenuistriatus – broadly construed
* †Kingaspis
** †Kingaspis avalonensis
* †Ladatheca – report made of unidentified related form or using admittedly obsolete nomenclature
** †Ladatheca cylindrica
* †Lapworthella
** †Lapworthella laudvigseni
** †Lapworthella ludvigseni
* †Leptostega
** †Leptostega abrupta
* †Linguella
** †Linguella viridis
* †Mellopegma – tentative report
* Restorative model of Microdictyon. †Microdictyon
* †Obolella
** †Obolella atlantica
* †Obolus
** †Obolus parvulus – tentative report
* †Onchocephalites
** †Onchocephalites permingeati
* †Paradoxides
** †Paradoxides harlani
* †Pelagiella
* †Plinthokonion
** †Plinthokonion arethion
* †Rhombocorniculum
** †Rhombocorniculum cancellatum
* †Scenella
** †Scenella reticulata
* †Serrodiscus
** †Serrodiscus bellimarginatus
* †Sokolovitheca
** †Sokolovitheca sokolovi
* †Stenotheca – report made of unidentified related form or using admittedly obsolete nomenclature
** †Stenotheca acutacosta
* †Sunnaginia
** †Sunnaginia imbricata
* Fossil of the mysterious Cambrian animal Torellella †Torellella
** †Torellella laevigata
* †Watsonella
** †Watsonella crosbyi

## Mesozoic

This list of the Mesozoic life of Massachusetts contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Massachusetts and are between 252.17 and 66 million years of age.

### A

* A
* B
* C
* D
* E
* F
* G
* H
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* M
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* U
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* W
* X
* Y
* Z
* †Acanthichnus
** †Acanthichnus aguineus – type locality for species
** †Acanthichnus alternans – type locality for species
** †Acanthichnus cursorius
** †Acanthichnus saltatorius
** †Acanthichnus trilinearis
* †Acteonella
* †Aenigmichnus
** †Aenigmichnus multiformis
* †Amblonyx – type locality for genus
** †Amblonyx giganteus – type locality for species
** †Amblonyx lyellianus
* †Amblypus – type locality for genus
** †Amblypus dextratus – type locality for species
* †Ammopus – type locality for genus
** †Ammopus marshi – type locality for species
* †Ampelichnus
** †Ampelichnus sulcatus
* †Anchisauripus
** †Anchisauripus exsertus – type locality for species
** †Anchisauripus hitchcocki – type locality for species
** †Anchisauripus minusculum – type locality for species
** †Anchisauripus minusculus
** †Anchisauripus parallelus
** †Anchisauripus sillimani
** †Anchisauripus tuberosus – type locality for species
* Restoration of the Early Jurassic sauropodomorph dinosaur Anchisaurus †Anchisaurus – type locality for genus
** †Anchisaurus polyzelus – type locality for species
* †Ancyropus
** †Ancyropus heteroclitus
* †Anomoepus
** †Anomoepus crassus
** †Anomoepus cuneatus – type locality for species
** †Anomoepus curvatus – type locality for species
** †Anomoepus gracillimus – type locality for species
** †Anomoepus intermedius – type locality for species
** †Anomoepus isodactylus – type locality for species
** †Anomoepus major – type locality for species
** †Anomoepus minimus – type locality for species
** †Anomoepus scambus – type locality for species
* †Anticheiropus – type locality for genus
** †Anticheiropus hamatus – type locality for species
** †Anticheiropus pilulatus – type locality for species
* †Antipus
** †Antipus bifidus – type locality for species
* †Apatichnus – type locality for genus
** †Apatichnus circumagens – type locality for species
* †Arachnichnus
** †Arachnichnus dehiscens – type locality for species
* †Argoides
** †Argoides macrodactylus
** †Argoides minimus – type locality for species
** †Argoides redfieldianum – tentative report
** †Argoides redfieldii – type locality for species

### B

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Illustration of a living Batrachoides toadfish †Batrachoides
** †Batrachoides nidificans
* †Batrachopus – type locality for genus
** †Batrachopus bellus – type locality for species
** †Batrachopus deweyi – type locality for species
** †Batrachopus dispar – type locality for species
** †Batrachopus gracilis – type locality for species
** †Batrachopus vuigaris
* †Bifurculipes
** †Bifurculipes curvatus
** †Bifurculipes elachistotatus
** †Bifurculipes laqueatus
** †Bifurculipes scolopendroideus
* †Bisulcus
** †Bisulcus undulatus – type locality for species
* †Brontozoum
** †Brontozoum approximatum
** †Brontozoum divaricatum – type locality for species
** †Brontozoum giganteum – type locality for species
** †Brontozoum isodactylum
** †Brontozoum parallelum – type locality for species
** †Brontozoum sillimanium
** †Brontozoum tuberatum – type locality for species

### C

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Chalthropteris
* †Clathropteris
* †Climacodichnus
** †Climacodichnus corrigatus – type locality for species
* †Cochlichnus
** †Cochlichnus anguineus
* †Conopsoides
** †Conopsoides curtus – type locality for species
** †Conopsoides larvalis
* †Copeza
** †Copeza archimedea
** †Copeza cruscularis
** †Copeza propinquata
** †Copeza punctata
** †Copeza triremus
* †Corvipes – type locality for genus
** †Corvipes lacertoideus – type locality for species
* †Cunichnoides – type locality for genus
** †Cunichnoides marsupialoideus – type locality for species
* †Cunicularius
** †Cunicularius retrahens

### E

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Fossils of the large theropod dinosaur footprint ichnogenus Eubrontes †Eubrontes
** †Eubrontes divaricatus
* †Eupalamopus – type locality for genus
** †Eupalamopus dananus – type locality for species

### G

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
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* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Gigandipus – type locality for genus
** †Gigandipus caudatus – type locality for species
* Fossil negative with skin impressions of the theropod dinosaur footprint ichnogenus Grallator †Grallator – type locality for genus
** †Grallator cuneatus – type locality for species
** †Grallator cursorius – type locality for species
** †Grallator formosus – type locality for species
** †Grallator gracilis – type locality for species
** †Grallator magnificus – type locality for species
** †Grallator parallelus – type locality for species
** †Grallator sillimaniium – tentative report
** †Grallator tenuis – type locality for species
* †Grammepus
** †Grammepus erismatus
** †Grammepus uniordinatus
* †Grammichnus
** †Grammichnus alpha

### H

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Halysichnus
** †Halysichnus laqueatus
* †Harpagopus
** †Harpagopus dubius
* †Harpedactylus
** †Harpedactylus crassus – type locality for species
** †Harpedactylus gracilior – type locality for species
** †Harpedactylus tenuissimus – type locality for species
* †Harpepus
** †Harpepus capillaris
* †Helcura
** †Helcura anguinea – type locality for species
** †Helcura littoralis – type locality for species
** †Helcura surgens – type locality for species
* †Henrisporites
** †Henrisporites angustus – type locality for species
* †Herpystezoum
** †Herpystezoum intermedius
** †Herpystezoum marshi
** †Herpystezoum minutus
* †Hexapodichnus
** †Hexapodichnus horreus
** †Hexapodichnus magnus
* †Holcoptera
** †Holcoptera giebeli
* †Hoplichnus – type locality for genus
** †Hoplichnus equus – type locality for species
** †Hoplichnus quadrupedans – type locality for species
* †Hyphepus – type locality for genus
** †Hyphepus fieldi – type locality for species

### I

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Isocampe – type locality for genus
** †Isocampe strata – type locality for species

### K

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
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* T
* U
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* W
* X
* Y
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* †Kayentapus
** †Kayentapus minor – type locality for species

### L

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
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* L
* M
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* T
* U
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* W
* X
* Y
* Z
* †Lagunculapes – type locality for genus
** †Lagunculapes latus – type locality for species
* †Lunula
** †Lunula obscura

### M

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Mormolucoides – type locality for genus
** †Mormolucoides articulatus – type locality for species

### O

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Ornithichnites – type locality for genus
** †Ornithichnites giganteus – type locality for species
* †Ornithoidichnites
** †Ornithoidichnites cuneatus – type locality for species
** †Ornithoidichnites giganteus
** †Ornithoidichnites lyellii – type locality for species
* †Ornithopus
** †Ornithopus adamsanus – type locality for species
* †Otouphepus
** †Otouphepus minor – type locality for species
* Fossil from Dinosaur State Park and Arboretum of the Late Triassic-Middle Jurassic sauropodomorph dinosaur footprint ichnogenus Otozoum †Otozoum – type locality for genus
** †Otozoum minus – type locality for species
** †Otozoum moodii – type locality for species

### P

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
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* W
* X
* Y
* Z
* †Palaephemera
** †Palaephemera mediaeva
* †Palamopus
** †Palamopus divaricans
* †Paxillitriletes
** †Paxillitriletes dakotaensis
* †Pityostrobus
** †Pityostrobus kayei – type locality for species
* †Platypterna
** †Platypterna concamerata – type locality for species
** †Platypterna deanii
** †Platypterna digitigrada – type locality for species
** †Platypterna gracillima – type locality for species
** †Platypterna recta – type locality for species
** †Platypterna varica – type locality for species
* †Plectropterna
** †Plectropterna gracilis – type locality for species
** †Plectropterna lineans
** †Plectropterna minitans
* †Plesiornis – type locality for genus
** †Plesiornis pilulatus – type locality for species
* Fossilized partial skeleton of the Early Jurassic theropod dinosaur Podokesaurus †Podokesaurus – type locality for genus
** †Podokesaurus holyokensis – type locality for species
* †Polemarchus – type locality for genus
** †Polemarchus gigas – type locality for species
* †Pseudoaraucaria
** †Pseudoaraucaria arnoldii – type locality for species
* †Pterichnus
** †Pterichnus centipes
* †Ptilichnus – type locality for genus
** †Ptilichnus anomalus – type locality for species
** †Ptilichnus hydrodromus – type locality for species
** †Ptilichnus pectinatus – type locality for species
** †Ptilichnus typographus – type locality for species

### S

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
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* L
* M
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* X
* Y
* Z
* †Sagittarius
** †Sagittarius alternans
* †Saltator
** †Saltator bipedatus – type locality for species
** †Saltator caudatus – type locality for species
* †Sauropus
** †Sauropus barrattii – type locality for species
* †Selenichnus
** †Selenichnus breviusculus – type locality for species
** †Selenichnus falcatus – type locality for species
* †Sillimanius
** †Sillimanius gracilior
** †Sillimanius tetradactylus
* Fossils of the Cambrian-modern worm burrow ichnogenus Skolithos †Skolithos
* †Sphaerapus
** †Sphaerapus larvalis
** †Sphaerapus magnus
* †Stegomus
** †Stegomus longipes – type locality for species
* †Stenonyx
** †Stenonyx lateralis – type locality for species
* †Steropezoum
** †Steropezoum elegantius
* †Steropoides
** †Steropoides divaricatus – type locality for species
** †Steropoides diversus – type locality for species
** †Steropoides elegans – type locality for species
** †Steropoides infelix – type locality for species
** †Steropoides ingens – type locality for species
** †Steropoides loripes – type locality for species
** †Steropoides uncus – type locality for species
* †Stratipes – type locality for genus
** †Stratipes latus – type locality for species

### T

* A
* B
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* D
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* F
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* H
* I
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* †Tarsodactylus – type locality for genus
** †Tarsodactylus caudatus – type locality for species
** †Tarsodactylus expansus – type locality for species
* †Tarsoplectrus
** †Tarsoplectrus angustus – type locality for species
* †Toxichnus – type locality for genus
** †Toxichnus inaequalis – type locality for species
* †Triaenopus
** †Triaenopus baileyanus
* †Trihamus – type locality for genus
** †Trihamus elegans – type locality for species
* Trisulcus
** †Trisulcus laqueatus
* †Typopus – type locality for genus
** †Typopus abnormis – type locality for species

### X

* A
* B
* C
* D
* E
* F
* G
* H
* I
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* L
* M
* N
* O
* P
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* R
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* T
* U
* V
* W
* X
* Y
* Z
* †Xiphopeza – type locality for genus
** †Xiphopeza triplex – type locality for species

## Cenozoic

This list of the Cenozoic life of Massachusetts contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Massachusetts and are between 66 million and 10,000 years of age.

### A

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Aligena
** †Aligena elevata
* Anadara
** Shell of an Anadara transversa, or transverse ark clam †Anadara transversa
* Angulus
** †Angulus agilis
* Anomia
** †Anomia paucistriata
** †Anomia simplexiformis
* Astarte
** †Astarte castanea
** †Astarte crenata
** †Astarte undata
* Astyris
** †Astyris lunata

### B

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
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* L
* M
* N
* O
* P
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* U
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* W
* X
* Y
* Z
* Portrait of a living Balaenoptera baleen whale Balaenoptera
** †Balaenoptera sursiplana – tentative report
* Balanus
** †Balanus crenatus
* Boonea
** †Boonea impressa
* Brachidontes
** †Brachidontes vineyardensis
* Buccinum
** †Buccinum undatum

### C

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Callinectes
** A living Callinectes sapidus, or Chesapeake blue crab †Callinectes sapidus
* †Callophoca
** †Callophoca obscura
* Cardium
* Caryocorbula
** †Caryocorbula contracta
* Cliona
** †Cliona sulphurea
* Colus
** †Colus stimpsoni
* Corymbites
** †Corymbites aethiops
* Crassostrea
** †Crassostrea virginica
* Crenella
** †Crenella glandula
* Crepidula
** †Crepidula fornicata
** †Crepidula plana
* Cumingia
** †Cumingia tellinoides
* †Cuneocorbula
** †Cuneocorbula whitfieldi
* Cyclocardia
** †Cyclocardia borealis
** †Cyclocardia novangliae
* Illustration of a living Cymindis ground beetle Cymindis
** †Cymindis extorpescens – type locality for species

### D

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
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* R
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* T
* U
* V
* W
* X
* Y
* Z
* A living Donacia leaf beetle Donacia
** †Donacia elongatula – type locality for species

### E

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
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* T
* U
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* W
* X
* Y
* Z
* Interior of the shell of an Ensis leei, or Atlantic jackknife clam Ensis
** †Ensis directus
* Eontia
** †Eontia ponderosa
* Equus
* Eupleura
** †Eupleura caudata

### G

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Gemma
** †Gemma gemma
* Fossilized shell of a Glycymeris, or bittersweet clam Glycymeris
** †Glycymeris wrigleyi – or unidentified related form

### H

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Hemimactra
** †Hemimactra solidissima

### I

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Ilyanassa
** †Ilyanassa obsoleta
** †Ilyanassa trivittata
* Ischadium
** Shells of Ischadium recurvum, or hooked mussels †Ischadium recurvum

### M

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Macoma
** †Macoma balthica
* †Mammut
** Restoration of a Mammut americanum, or American mastodon †Mammut americanum
* †Mammuthus
* Mercenaria
** †Mercenaria campechiensis
** †Mercenaria mercenaria
* Mesodesma
** †Mesodesma arctatum
* Modiolus
** †Modiolus hollicki
* †Monotherium
** †Monotherium aberratum
* †Mya
** †Mya arenaria
** †Mya truncata
* Mytilus
** †Mytilus edulis

### N

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Preserved Neverita moon sea snail Neverita
** †Neverita duplicatus
* Nucula
** †Nucula potomacensis – or unidentified related form

### O

* A
* B
* C
* D
* E
* F
* G
* H
* I
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* A living Odobenus rosmarus, or walrus Odobenus
* Odostomia
** †Odostomia crenulata
** †Odostomia semicostata
* Ostrea

### P

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* Panomya
** †Panomya norvegica
* Panopeus
** †Panopeus herbstii
* Petricola
** †Petricola pholadiformis
* †Pinguinus
** Taxidermied specimen of Pinguinus impennis, or the great auk †Pinguinus impennis
* Placopecten
** †Placopecten magellanicus
* †Prophoca – or unidentified comparable form
** †Prophoca rousseaui

### S

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* †Saxinis
** †Saxinis regularis – type locality for species
* Serpula
** †Serpula dianthus
* Life restoration of the Oligocene-Miocene shark-toothed dolphin Squalodon †Squalodon
** †Squalodon atlanticus

### T

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* Shell of a Tellina, or tellin Tellina
* Terebra
** †Terebra juvenicostata
* Turbonilla
** †Turbonilla interrupta
* Turritella

### U

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* Urosalpinx
** A living Urosalpinx sea snail, or oyster drill †Urosalpinx cinerea