Nidamental gland

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Ventral view of the viscera of Chtenopteryx sicula, showing the presence of the nidamental glands and accessory nidamental glands.

Nidamental glands are internal organs found in some elasmobranchs and certain molluscs, including cephalopods (specifically Decapodiformes and nautiluses) and gastropods.^[1]^[2]^[3]

In cephalopods, nidamental glands are large, paired glandular structures found in the mantle cavity.^[4] Accessory nidamental glands may also be present.^[4] Nidamental glands are composed of lamellae and are involved in the secretion of egg cases or the gelatinous substance comprising egg masses.^[1]

References

↑ 1.0 1.1 Young, R.E., M. Vecchione & K.M. Mangold (1999). Cephalopoda Glossary. Tree of Life Web Project.
↑ Prasad, R.R. (1948). "Observations on the Nidamental Glands of Hydrolagus colliei, Raja rhina and Platyrhinoidis triseriatus". Copeia 1948 (1): 54–7. doi:10.2307/1438791. JSTOR 1438791.
↑ Bloodgood RA (1977). "The squid accessory nidamental gland: ultrastructure and association with bacteria". Tissue Cell 9 (2): 197–208. doi:10.1016/0040-8166(77)90016-7. PMID 906013.
↑ 4.0 4.1 Nair, J.R., D. Pillai, S.M. Joseph, P. Gomathi, P.V. Senan & P.M. Sherief (2011). Cephalopod research and bioactive substances. PDF Indian Journal of Geo-Marine Sciences 40(1): 13–27.

Cephalopod anatomy

Shell

Shell types	External shells: Ammonoid shell Argonautid eggcase Nautiloid shell Orthocone Internal shells: Belemnoid guard Cirrate shell Cuttlebone Gladius (pen) Spirula shell Stylet

External features	Aperture Apex Callus Lirae Periostracum Sculpture Spire Sutures Umbilicus

Internal features	Body chamber Camerae Nacre Phragmocone Septa Siphuncle Whorls

Mantle

External anatomy	Dermal structures Fins (wings) Flotation devices ("secondary fins") Mantle locking-apparatus Tail

Internal anatomy	Branchial hearts Ctenidia (gills) Hepatopancreas (digestive gland) Ink sac and ink Needham's sac Nephridia ("kidneys") Nidamental glands Osphradium Pericardial glands

Funnel

Foveola
Funnel groove
Funnel locking-apparatus
Funnel organ
Funnel retractor muscles
Funnel valve

Head and limbs

Brachial crown	Arms Hectocotylus Tentacles Carpus Dactylus Manus Suckers and hooks

Buccal region	Aptychus Beak Odontophore Radula

Occipital region	Occipital crest Occipital folds (nuchal folds) Occipital membrane Olfactory organ Nuchal organ

Other parts	Eyes Cornea Eye pore Eyelid sinus Secondary eyelid Statocysts

General

Chromatophores
Photophores
Nervous system
- Squid giant axon
- Squid giant synapse

Developmental stages: Spawn → Paralarva (Doratopsis stage) → Juvenile → Subadult → Adult • Protoconch (embryonic shell)

v t e Gastropod anatomy

Shell	Aperture Apex Body whorl Callus Columella Lip Lira Nacre Periostracum Peristome Plait Protoconch Sculpture Selenizone Siphonal canal Siphonal notch Spire Stromboid notch Suture Umbilicus Valve Varix Whorl

Other hard parts	Clausilium Love dart Operculum Pearl Radula

External soft parts	Caryophyllidia Caudal mucous pit Cerata Mantle Mentum Parapodium Pneumostome Rhinophore Semper's organ Siphon Suprapedal gland

Internal soft parts	Circulatory system of gastropods Crop Ctenidium Digestive system of gastropods Diverticula Excretory system of gastropods Gastric shield Hancock's organ Hepatopancreas Hypobranchial gland Nephridium Nervous system of gastropods Nidamental gland Odontophore Oesophageal pouch Osphradium Reproductive system of gastropods Respiratory system of gastropods Sensory organs of gastropods

Other	Epiphragm Pseudofeces Torsion Tyrian purple Veliger

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