deltidium

Noun

(plural deltidiums or deltidia)

(zoology) The triangular space under the beak of many brachiopod shells.

Origin

Latin, from Ancient Greek. See delta.

English Wiktionary. Available under CC-BY-SA license.

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"Deltidium." YourDictionary. LoveToKnow. www.yourdictionary.com/Deltidium.

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Deltidium. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/Deltidium

SentencesSentence examples

Sentence Examples

F, foramen; d, deltidium; t, teeth; a, adductor impressions (= occlusors, Hancock); c, divaricator (=cardinal muscles, King, = muscles diducteurs principaux, Gratiolet); c', accessory divaricators (muscles diducteurs accessoires, Gratiolet); b, ventral adjustor (=ventral peduncular muscles, or muscles du pedoncule paire superieure, Gratiolet); b', peduncular muscle.
The form of the deltidium varies in different genera.
The pro-deltidium, a term introduced by Hall and Clarke, signifies a small embryonic plate originating on the dorsal side of the body.
The pseudo-deltidium (so named by Bronn in 1862) is a single plate which grows from the apex of the delthyrium downwards, and may completely close the aperture.
In the Telotremata neither pro-deltidium nor pseudo-deltidium is known.

Also Mentioned In

deltidia

deltidiums

WORDS NEAR deltidium IN THE DICTIONARY