An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms

by Paul S. Mikkelsen

Look for:  
Terms for Which a Definition is Needed
      137 terms were found.

Term Definition

ACCESSORY BORING ORGAN
(= ABO; A.B.O.)
  [need definition]. Term coined by Mel Carriker.
   

ADPRESSED   [need definition]; see also: IMPRESSED; CHANNELED; SUTURE, ADPRESSED.
   

AMMONOTELIC   [need definition]; see also: URICOTELIC.
   

ANAL SINUS   [need definition]. See illustration: Composite Gastropod.
   

APERTURAL LIP, INNER   [need definition]. See illustration: Composite Gastropod. See also: APERTURAL LIP; OUTER APERTURAL LIP
   

APERTURAL LIP, OUTER   [need definition]. See illustration: Composite Gastropod. See also: APERTURAL LIP; INNER APERTURAL LIP.
   

ASCOGLOSSAN   [need definition]. Newer, preferred term for the old term: Sacoglossan. They have a UNISERIATE RADULA from which old teeth fall from the RADULA RIBBON into an ASCUS SAC. See also: SEA SLUG; NUDIBRANCH.
Photo: Elysia chlorotica (Gould, 1870)
   

AVICULIFORM   [need definition].
   

BRANCHIAL PLUME   [need definition]. In nudibranchs… See illustration: Composite Nudibranch.
   

BREVICONE   [need definition]; see also: CYRTOCONE; ORTHOCONE.
   

BUCCAL MASS   [need definition]
   

BYSSAL PLUG   [need definition]
   

CAPSA
(pl. CAPSAE)
  [need definition]
   

CARDINAL PIT   [need definition]
   

CARDO   [need definition]; (see: Popov, 1980).
   

CHAETODERM   [need definition].
   

CHAMBERED NAUTILUS   [need definition]. A CEPHALOPOD… ; see also: CONCAMERATIONS; PHRAGMOCONE; SIPHUNCLE.
   

CLADISTICS   [need definition]. See also: CLADOGRAM.

See the Paleos website.
   

CLADOGRAM   [need definition]. See also: CLADISTICS.
   

COELOM   [need definition].
   

COLUMELLA, STRAIGHT   [need definition].
   

COLUMELLA, TRUNCATE   [need definition].
   

COLUMELLAR PLAIT   [need definition]. See illustration: Composite Gastropod.
   

COLUMELLAR PLICAE   [need definition]. See illustration: Composite Gastropod.
   

COMMARGINAL   [need definition].
   

COMMARGINAL RIB   [need definition]; see also: OVERRIDE.
   

CONCENTRIC SCULPTURE   [need definition]; see also: AXIAL SCULPTURE.
   

CONCHOMETRY   [need definition]. See references:
Boycott, A.E. 1928. Conchometry. Proc. Malac. Soc. London 18:8-31.
Parodiz, J.J. 1951a. Me´todos de conquiliometry #305;´a. Physis 20(58):241–248.
Parodiz, J.J. 1973e. Gastropod conchometry. Pittsburgh Shell Club Bulletin 8:14–16.
   

CRYSTALINE STYLE   [need definition]. In bivalves...
   

CTENODONT   [need definition]; see also: PSEUDOCTENODONT; PSEUDOTAXODONT.
   

CUTTLEFISH   [need definition]. A CEPHALOPOD… See also: BELOPTERA.
   

DETORSION   [need definition]. See also: TORSION.
   

DEVOLUTE   [need definition]; see also: LOOSELY COILED.
   

DIGESTIVE GLAND   [need definition].
   

ENANTIOMORPH   [need definition].
   

EULAMELLIBRANCH   A type of bivalve CTENIDIUM or gill in which [need definition]; see also: DIBRANCH; EULAMELLIBRANCH; FILIBRANCH; LAMELLIBRANCH; PROTOBRANCH; PSEUDOLAMELLIBRANCH; SEPTIBRANCH; TECTIBRANCH; TETRABRANCH.
   

EVOLUTE   [need definition]; see also: DEVOLUTE.
   

EVOLUTION   [need definition]; see also: EVOLUTION, CLANDESTINE; EVOLUTION, PROGRAMME.
   

EXHALANT SIPHON   [need definition]; see also: HYPONOME; INHALANT SIPHON.
   

EXTRA-BRANCHIAL APPENDAGE   [need definition]. In NUDIBRANCHS… See illustration: Composite Nudibranch.
   

FILIBRANCH   A type of bivalve CTENIDIUM or gill in which [need definition]. The Mytilacea, Pteriacea, Pectinacea, and Anomiacea have filibranch CTENIDIA. See also: DIBRANCH; EULAMELLIBRANCH; LAMELLIBRANCH; PROTOBRANCH; PSEUDOLAMELLIBRANCH; SEPTIBRANCH; TECTIBRANCH; TETRABRANCH.
   

GARSTANG'S THEORY   [need definition]; see also: TORSION.
   

GELOINA   [need definition].
   

GENITAL PORE   [need definition]; = GENITAL OPENING; See labelled photo on www.jaxshells.org/eraj1.htm
   

GENUS
(pl. GENERA)
  [need definition]
   

GIZZARD PLATES   [need definition].
   

HAEMOCOEL   [need definition].
   

HEART   [need definition].
   

HETEROPOD   [need definition]; see also: PTEROPOD.
   

HORNY   [need definition]; see also: CHITINOUS.
   

HYPERSTROPHIC   [need definition]; see: ULTRADEXTRAL; see also: HETEROSTROPHIC.
See other gastropod shapes.
   

INHALANT SIPHON   [need definition]; see also: EXHALANT SIPHON.
   

ISOSTROPHIC   Gastropod COILING coiling in which [need definition].
See other gastropod shapes.
   

JAW   [need definition].
   

LABIAL PALPS   [need definition].
   

LAMALLA, AXIAL   [need definition]. See illustration: Composite Gastropod.
   

LAMINAR TOOTH   [need definition]; used in describing Neaeromya (see: Abbott, 1974).
   

LECTOPARATYPE   [need definition].

See the publication: "Terminology of Types" by Frizzell.
   

LIMACIFORM   [need definition]; used by Abbott, 1974 (pg. 367) in description of Dendronotus.
   

LIP, FLARED   [need definition]. In the Strombidae…
   

LIP, REFLECTED   [need definition].
   

MESOGASTROPOD   [need definition].
   

MESOSTRACUM   [need definition]; (refers to some aspect of CHITONS)
   

METAMORPHOSIS   [need definition]. See also: NEPIONIC; POSTMETAMORPHIC; PREMETAMORPHIC.
   

MONOPHYLY   [need definition]. See also: PHYLOGENY; POLYPHYLY; PARAPHYLY.
   

MONOPLACOPHORAN   [need definition].
   

MUSCLE SCAR, CRUCIFORM   [need definition].
   

NECK   [need definition]. See illustration: Composite Gastropod.
   

NOMEN CONSERVANDUM   [need definition].
   

NUDIBRANCH   [need definition]. See also: ASCOGLOSSAN; SEA SLUG.
   

ORTHOCONE   [need definition]; see also: CYRTOCONE; BREVICONE.
   

OUTER LIP   [need definition].
   

OUTER LIP TOOTH   [need definition]. See: LABIAL TOOTH. See illustration: Composite Gastropod.
   

OVIDUCT   [need definition].
   

PALATAL TOOTH   [need definition].
   

PALLIAL CAVITY   [need definition].
   

PAPILLAE, DORSAL   [need definition]. In NUDIBRANCHS… See illustration: Composite Nudibranch.
   

PARAPHYLY   [need definition]. See also: PHYLOGENY; POLYPHYLY; MONOPHYLY.
   

PARASITE   [need definition]. See also: COMMENSAL.
   

PARIETAL DENTICLE   [need definition]; present in some Polygyridae.
   

PECTINIFORM   [need definition].
Photo: Argopecten irradians concentricus (Say, 1822)
   

PERFOLIATE   [need definition].
   

PERIOSTRACAL GROOVE   [need definition].
   

PERIPHERY, WHORL   [need definition].
   

POLYPHYLY   [need definition]. See also: PHYLOGENY; MONOPHYLY; PARAPHYLY.
   

PROBOSCIS COLUMN   [need definition].
   

PROTOBRANCH   [need definition].
   

PROVINCE, ALEUTIAN   [need definition]. See also: PROVINCE, (types).
   

PSEUDOCARDINAL   [need definition].
   

PSEUDOCONCH   [need definition]; present in the Cymbulidae (Opisthobranchia: Thecosomata).
   

RADIAL CORD   [need definition]. See illustration: Composite Bivalve.
   

RADIOLITID   [need definition].
   

RAMP, SUTURAL   [need definition]. See illustration: Composite Gastropod.
   

RAPHITOMA BICOLOR   [need definition].
   

REFLEXED   [need definition]. See also: DEFLEXED; RECURVED.
   

RETRACTOR MUSCLE   [need definition]; see also: ADDUCTOR MUSCLE.
   

RIB, AXIAL   [need definition]. See illustration: Composite Gastropod. See also: SCLEROCHRONOLOGY; VARIX.
   

RIB, LONGITUDINAL   [need definition]. See illustration: Composite Gastropod.
   

RIDGE   [need definition].
   

ROSTRUM   [need definition].
   

SCALE   [need definition]. In CHITONS… See illustration: Composite Chiton.
   

SCAPHOPOD   A member of the class Scaphopoda, a group of molluscs made up of [need definition]. Also commonly called a TUSK SHELL. See also: CAPTACULA. See illustration at UCMP.
   

SEPTIBRANCH   [need definition].
   

SHIELD, PARIETAL   [need definition]. See illustration: Composite Gastropod.
   

SIPHONAL NOTCH   [need definition]... See also: SIPHONOSTOMATE.
   

SIPHONAL SINUS   [need definition]; see also: BASAL FASCIOLE.
   

SLOPE, SUTURAL   [need definition]. See illustration: Composite Gastropod.
   

SPATHATE   [need definition]; (see description of Aequipecten glyptus in: Abbott, 1974.)
   

SPECIES   [need definition]; see also: SUBSPECIES; DIAGNOSIS.
   

SPECIMEN   [need definition].
   

SPERM   [need definition]; see also: EUPYRENIC; OLIGOPYRENIC; SPERMATOPHORE.
   

SPERMATHECA   [need definition].
   

SPIRAL CORD   [need definition]. See illustration: Composite Gastropod.
   

SPIRE   [need definition].
   

SQUID   [need definition]. A CEPHALOPOD… see also: GIANT SQUID.

See the detailed web page on squid terminology, from the excellent "Cephalopod Glossary" by Richard E. Young, Michael Vecchione, and Katharina M. Mangold.
   

STRIA, AXIAL   [need definition]. See illustration: Composite Gastropod.
   

STRIA, SPIRAL   [need definition]. See also: CORD. See illustration: Composite Gastropod.
   

SUBELLIPTICAL   [need definition]. See other bivalve shapes.
   

SUBSPECIES   [need definition]; see also: FORM; SPECIES; VARIETY.
   

SUTURAL SINUS   [need definition].
   

SUTURAL TUFT   [need definition]. In CHITONS… See illustration: Composite Chiton.
   

SUTURE, ADPRESSED   [need definition]; see also: SUTURE, IMPRESSED; SUTURE, CHANNELED.
   

SUTURE, CHANNELED   [need definition]. See illustration: Composite Gastropod. See also: SUTURE, ADPRESSED; SUTURE, IMPRESSED
   

SUTURE, CRENATE   [need definition]. See illustration: Composite Gastropod.
   

SUTURE, CRENULATE   [need definition].
   

SUTURE, IMPRESSED   [need definition]; see also: SUTURE, ADPRESSED; SUTURE, CHANNELED.
   

SUTURE, INDENTED   [need definition].
   

SUTURE, INDISTINCT   [need definition]. See illustration: Composite Gastropod.
   

SUTURE, STRONGLY INDENTED   [need definition].
   

TENTACLE, ORAL   [need definition]. In nudibranchs… ; = LABIAL TENTACLE. See illustration: Composite Nudibranch.
   

TENTACULAR SHIELD   [need definition]; present in the TECTIBRANCHS and CEPHALASPIDS.
   

THREAD, SPIRAL   [need definition]. See illustration: Composite Gastropod.
   

TRANSPOSED HINGE TOOTH   [need definition]. See: TRANSPOSED HINGE.

See: Van der Schalie, H. 1936. Transposed hinge teeth of North American naiades. Nautilus 49(3):79-84.
   

TYPE MATERIAL   [need definition].

See the publication: Frizzell, Donald Leslie. 1933. Terminology of Types. American Midland Naturalist 14(6):637-668.
   

UNILOCULAR   [need definition]; see also: LOCULAR; MULTILOCULAR.
   

VALVE, CENTRAL AREA   [need definition]. In CHITONS, … See illustration: Composite Chiton.
   

VALVE, LATERAL AREA   [need definition]. In CHITONS, … See illustration: Composite Chiton.
   


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