Molluscan Hardpart Morphology
Mostly Plio-Pleistocene & Holocene Forms of SW Florida
John Baker Pelecypods (Bivalves)
Velum w/ Cilia
Shell
Microscopic planktonic larva ‘veliger’ of a pelecypod or bivalve
Post. Lateral Tooth
AAM PAM
Pallial Sinus Mercenaria campechiensis
PAMS AAMS
Pallial Sinus Pallial Line Mercenaria campechiensis Dosinia elegans Inverted ‘V’ cardinal tooth in L Valve
1.0 cm
Mulinia lateralis Mulinia lateralis Dimyarian: anterior & posterior Adductor Muscle Scars
Umbo
Beak
Post.Add. Muscle Scar
Cardinal Teeth & Sockets
Pallial Line
Ant.Add.Muscle Scar
anterior Merecenaria campechiensis dorsal view Lunule
Beak points anteriorly
Umbo Left Right
Escutcheon
Showing Nymphs for Ligament Attachment
posterior Dorsal View Escutcheon & Ligament Scar Chione sp. Mostly C.cancellata
Lirophora latilirata Eucrassitella sp.
Lunule Escutcheon Eucrassitella speciosa Carditamera arata Taxodont ‘teeth’ & Duplivincular Ligament scars Anadara petersburgensis
Taxodont tooth type
Cardinal (Ligament) Area
L. PAMS
AAMS
R.
Anadara floridana Anadara sp. 3 mm Glycymeris pectinata Arca zebra Duplivincular Lig. Attachment
Cardinal Area Anadara floridana ? Anadara petersburgensis Noetia limula Noetia limula Nuculana acuta
3 mm Dinocardium robustum Dinocardium robustum
Trachycardium
Posterior Lateral Tooth
Anterior Lateral Tooth Edentulous area
PLT CT
ALT Trachycardium egmontianum Laevicardium laevigatum Macrocallista nimbosa Macrocallista nimbosa
R
L Macrocallista nimbosa Long AAMS
Anodontia alba Pseudomiltha floridana Phacoides disciformis 3 mm
External, Right valve Internal, Right valve
Crassinella lunulata (Conrad) Internal, Left valve
Ext., Rt. Valve
3 mm
Caryocorbula contracta (Say)
CHONDROPHORE in Rt. valve Chesapecten madisonius 15 cm
Carolinapecten eboreus Argopecten irradians Bailey-Matthews Shell Museum Isognomon alatus
Multivincular ligament area 600 um (0.6mm) Beautiful nacreous (still aragonitic) pearl from Pinecrest beds of the Tamiami Fm.(beds 6-7) unknown oyster-note iron coloration giving a ‘golden’ tint - pretty rare! L R
Arcinella cornuta
Enlarged Lateral Tooth Mimics Hidden Cardinals Brachidontes sp. 4 mm Perna conradiana Anomia simplex Monomyarian
One Adductor M. Scar
Plicae or Folds
Plicatula sp. Hyotyssa haitensis Hyotyssa haitensis Hyotyssa haitensis Hyotyssa haitensis Conradostrea sculpturata
Conradostrea lawrencei Conradostrea sculpturata
Conradostrea lawrencei Conradostrea lawrencei 2 mm
resilifer Oyster ‘spat’ or juvenile Bailey-Matthews Shell Museum Siphons
Byssus & Byssal Threads
Bailey-Matthews Shell Museum Atrina rigida Pinna caloosaensis Bailey-Matthews Shell Museum
Bailey-Matthews Shell Museum All 2-4 mm
Chione Parastarte triquetra cancellata
Nuculana acuta Panopea sp. Gastropods
Chicoreus sp. Sp
B.W. callus Neverita duplicata Bursatella leachi pleii, Class Gastropoda: ord. Sacoglossa: fam. Aplysidae Pteropods Crucibulum sp. Leucopinella talanteia
2 mm Cancellaria reticulata Bubble shell 1.4 mm
Note heavy outer lip & 3 teeth on inner lip Ringicula guppyi var. floridana Dall Cymatosyrinx lunata
Pleiptygma lineolata 3 mm A wentletrap Epitonium sp. 2 mm Fusinus caloosaensis C. adversarius C. spurius
Conus spp.
Hystrivasum locklini &/or horridum
Umbilicus Innner Lip Folds/Plicae Cancellaria rotunda
Cantharus sp. Turbinella scolymoides Eupleura sulcidentata Gastropod Opercula (covers aperture)
2 mm 1 cm
Eupleura sulcidentata Cymatosyrinx lunata Busycon sinistrum smaller Males Busycon sinistrum large Female Melongena corona NODES
RETICULATE Melongena corona Melongena corona Busycon spiratum Ficus communis
Busycotypus spiratus Triplofusus giganteus Busycon sinistrum Triplofusus giganteus large Female Busycon sinistrum Triplofusus giganteus large Female
Fasciolaria lilium hunteria Fasciolaria lilium hunteria Terebraspira scalarina Turbinella regina Strombus gigas Strombus alatus Urosalpinx stimpson Siphocypraea sp. Oliva sayana UP
Vermetid Gastropod: Vermicularia recta Vermetid Gastropod: Vermicularia recta
Cheilostome Bryozoan colony at center Petaloconchus nigricans or “worm rock”
cf Rupellaria sp. burrow- a bivalve Turitella wagneriana Architectonica sp. Vermicularia sp. 3 mm
Seila adamsi 4 mm
Note differing ? Retilaskeya or ornamentation on embryonic Cerithiopsis sp. protoconch Astraea phoebia
2.5 mm Euglandina sp.
Planorbella sp. “Freshwater“ Gastropods Crepidula plana Crepidula sp. (4 mm) Caecum sp.- various, all ~2 mm Prunum apicinum Actiocena canaliculata
3 mm
Marginella sp. 2-4 mm
Ringicula Teinostoma sp.
Retilaskeya bicolor Bittiolum varium
Varix
Egg mass
Hatchling Living chamber
siphuncle septa Thin Section of Nautilus
Septal neck & foramen
Mural pt of septum
Caecum w/ Conchiolin
Nacreous layer apex Umbilical perf.
Architeuthis 2006 Polyplacophora (Amphineura)- Chitons Chiton Polyplacophora (=Amphineura):chitons
Foot
Gill
Mantle’s shell gland ‘Liver’
Rectum Ventral
Gut
Gonads Foot Epidermis Kidney Muscle
Gill Mantle Lima scabra - note red mantle w/ tentacles Gastopoda: Cyphoma gibbosum
Colored, patterned mantle exposed on surface of univalve planktonic , bubble-making snail: Janthina sp. A ‘pulmonate’ land snail -? Helix
Slug: CS- ovotestis gut ‘liver’
mantle
foot
Albumin-’mucus’ gland VSNC Nephridium
spermoviduct