Molluscan Hardpart Morphology

Mostly Plio-Pleistocene & Holocene Forms of SW Florida

John Baker Pelecypods (Bivalves)

Velum w/ Cilia

Shell

Microscopic planktonic larva ‘’ of a pelecypod or bivalve

Post. Lateral Tooth

AAM PAM

Pallial Sinus Mercenaria campechiensis

PAMS AAMS

Pallial Sinus Mercenaria campechiensis Dosinia elegans Inverted ‘V’ cardinal tooth in L

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

Beak points anteriorly

Umbo Left Right

Escutcheon

Showing Nymphs for 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) from Pinecrest beds of the Tamiami Fm.(beds 6-7) unknown -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. 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 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

spermoviduct