A simplified guide to common fossils of Maryland

A
Simplified
Guide to
Common
Maryland
Fossils

COMMON PALEOZOIC TREES
A
A
A
A
B
B
C
B
B
Lepidophloios laricinus Lepidodendron aculeatum
Sigillaria mammilaris
A
Calamites sp.
Cordaicladus sp.
A
A
A
Sigillaria reticulata
B
Asterophyllites sp.
Artisia transversa
Lepidophylloides sp.
Sigillariophyllum sp.
C
B
B
Annularia sp.
B
Cordiates sp.

Pecopteris arborescens
Neuropteris rarinervis
Neuropteris scheuchzeri
Pecopteris plumosa
COMMON FERNS AND PLANT LEAVES
Pterophyllum sp.
Neuropteris flexosa
Sassafras sp. (Sassafras)
Alethopteris serlii
Mariopteris sp.
Betula sp. (Birch)
Alethopteris lonchitca
Sphenopteris obtusiloba
Eremopteris artemisiaefolia
Magnolia sp. (Magnolia)

Busycon
coronatum (x 1/2)
Aurinia typus
Bulliopsis quadrata Bulliopsis marylandica
Nassarius
peraltoides Nassarius peralta
COMMON GASTROPODS
Ancistrosyrinx
rotifera
Scala sp.
Busycon spiniger
Siphonalia
marylandica
Busycon fusiforme
Busycon tuberculatum
Cylichnina conulus
Conus diluvianus
Siphonalia devexa
Volvula iota
Oliva litterata
Aurinia mutabilis (x 2/3)

Trochonema sp.
Maclurea sp.
Cyclonema sp. Succinea sp.
Polinices duplicatus
Vitrinella lipara
Sigaretus fragile
Lophospira sp.
Euomphalus sp.
Maclurites sp.
Lecanospira sp.
Turritella aequistriata
Lunatia heros
Turritella variabilis
COMMON GASTROPODS
Pleurotomaria sp.
Turritella plebia
Turritella indentata
Cerithiopsis
calvertensis
Loxonema sp.
Lunatia hemicrypta
Calliostoma philanthropus
Eulima migrans
Eulima eborea
Turbonilla interrupta
Calliostoma aphelium

Chesapecten nefrens
Placopecten marylandicus
Barbatia marylandica
Ostrea carolinensis (x 2/3)
COMMON BIVALVES
Cardiopsis sp. (x 2/3)
Chesapecten santamaria
Arca staminea (x 2/3)
Arca arata (x 2/3)
Pecten humphreysii
Ostrea falacata (x 1/2)
Gryphaea sp.
Plicatula densata
Cardium sp. (x 1/2)
Cyclocardia
granulata (x 2/3)

Mya producta (x 1/3)
Allorisma sp.
Grammysia sp.
Discinisca lugubris (x 3/4)
Anomia
aculeata (x 2/3)
Venus mercenaria (x 1/2)
Mactra
clathrodon (x 1/2)
COMMON BIVALVES
Astarte thisphila (x 2/3)
Spisula subponderosa (x 1/2)
Geukensia sp.
Astarte perplana (x 2/3)
Astarte cuneiformis (x 2/3)
Melosia staminea (x 2/3)
Pandora crassidens
Glossus fraterna (x 1/2)
Chione alveata (x 2/3)
Nucula sinaria
Yoldia laevis
Nuculana liciata
Glycymeris parilis (x 1/2)
Nucula proxima
Crassatella marylandica (x 1/2)

Refinesquina sp. (x 2/3)
Paraspirifer sp.
Atrypa sp. (x 2/3)
Enteletes sp.
Strophomena sp.
Pugnoides sp.
Rhynchotreta sp.
Mucrospirfer sp. (x 1.5)
COMMON BRACHIOPODS
Reserella sp.
Herbetella sp. (x 1/2)
Orthorhynchula sp.
Platyrachella sp.
Spirifer sp.
Derbyia sp.
Composita sp.
Platystrophia sp.
Enteletes sp.
Terebratula
maxima

Kazlowski sp.
Neochonetes sp. (x 2)
Ovatia (x 1/2)
Reticulatia sp.
Sowerbyella sp.
Leptaena sp.
COMMON BRACHIOPODS
Pulchratia sp.
Stophomena depressa
Antiquatonia sp.
Pentamerus sp. (x 1/2)
Juresania sp.
Linoproductus sp.
Desmoinesia sp.

Cymatoceras carlottense (x 1/2)
Cymatoceras elegans (x 2/3)
Temnocheilus forbesianus
Hercoglessa tuomeri (x 2/3)
Nautilus dekayi
Tarphyceras seeleyi (x 2/3)
Schroederoceras eatoni (x 2/3)
Pseudoparalegoceras sp.
COMMON CEPHALOPODS
Psiloceras planorbis
Sphyradoceras desplainese (x 2/3)
Sphyradoceras costatum (x 2/3)
Eurystomites undatus (x 2/3)
Eurystomites kelloggi (x 1/2)

Scaphites nodosus (x 1/3)
Cardioceras cordiformis (x 2/3)
Orthoceras pelops (x 2/3)
COMMON CEPHALOPODS
Cameroceras tenuiseptum
Ceratites humboldtensis (x 2/3)
Ceratites blakei (x 2/3)
Didymoceras conradt
Kionoceras ornus (x 2/3)
Dufrenoya sp.(x 1/3)
Placenticeras intercalare (x 3/4)
Cycloceras nicolletti (x 1/2)
Orthoceras
sociale (x 2/3)
Cycloceras lesueuri (x 2/3)
Orthoceras
stylus (x 2/3)

COMMON TRILOBITES
Lonchodomas sp.
Cryptolithus sp.
Illaenus sp.
Perenopolis sp. Condylopyge sp.
Amphyxina sp.
Phacops rana
(rolled version above)
Paladin sp.
Greenops sp.
Phacops logani
with enlarged cephalon
Calodiscus sp.
Calymene niagarensis
Philipsia sp.
Asaphiscus wheeleri
Calymene platys
Paraphillpsia sp.
Dalmanites calypso
Flexicalymene sp.
Calliops sp.
Homalonetus dekayi Isotelus gigas
Isotelus gigas
Isotelus maximus
broad form

COMMON TRILOBITES
Neolenus serratus
Cryphaus boothi
with pygidium
Paradoxides harlani
Elrathia kingi
Bathynotus holopyga
Elrathia piochensis
Olenellus thompsoni
(w/ juvenile cephalon)
Zacanthoides spinosa
Olenellus gilberi
Elrathia adamsi
Zacanthoides typicalis
Mesonaces
vermontana

Phillipsastraea verneulli
Flabellum sp.
Favia sp.
COMMON CORALS
Micrabacia
marylandica (x 3)
Acropora sp. Astrhelia Palmata
Zaphrentis prolifica
Oculina
mississippiensis
Cystiphyllum
conifollis
Thecia major
Septastrea sp.
Oculina
vicksburgensis
Enterolasma sp.
Cystiphyllum varians
Turbinolia acuticostata
Cystiphyllum sp.
Lithostrontionella sp. (x ½)
Trochocyathus clarkeanus
Turbinolia
pharetra
Stereostylus sp.
Heliophyllum
halli
Platytrochus
stokesi
Eupsammia
elaborata
Lophophyllum sp.
Zaphrentis
simplex

Carcharodon megalodon
(Extinct giant white shark)
Carcharias sp.
(Extinct sand tiger shark)
Notidanus primigenius
Six-gilled Shark
Hemipristis serra
(Snaggletooth shark)
Odontaspis sp.
(Sand tiger shark)
Sphyrna sp.
(Hammerhead shark)
RAY SPINES
Myliobatis pachyodon
(Eagle rays)
COMMON SHARK TEETH
RAY PLATES (DENTAL PAVEMENTS)
Aëtobatis arcuatus
(Bonnet ray)
Isurus sp.
(Mako shark)
Otodus obliquus
(Extinct Mackeral shark)
Galeocerdo sp.
(Tiger shark)
Myliobatis pachyodon
(Eagle ray)