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Crustaceans have a pair of mandibles that typically consist of an enlarged basal segment (coxa) and a palp (sensory feeler) consisting of all other segments. In some groups, such as the Branchiopoda, the palp is reduced or absent. Crustacean mandibles may be equipped with special teeth (molar and incisor processes).
Crustaceans comprise a number of classes, with various feeding modes supported by a range of adaptations to the mouthparts. In general, however, crustaceans possess paired mandibles with opposing biting and grinding surfaces. The mandibles are followed by paired first and second maxillae.
Gnashing (חרק) of teeth (שנים) appears several times in the Old Testament, including three mentions in Psalms, one in Job and one in Lamentations. Lamentations says, of the Babylonian occupiers of Jerusalem, " שָֽׁרְקוּ֙ וַיַּֽחַרְקוּ־שֵׁ֔ן ," "They hiss (שרק can also mean to weep) and gnash their teeth".
The word Sháhál (usually meaning "lion") might possibly, owing to some copyist's mistake, have crept into the place of another name now impossible to restore. צֶפַע ṣep̲aʿ (Isaiah 59:5), "the hisser", generally rendered by basilisk in ID.V. and in ancient translations, the latter sometimes calling it regulus. This snake was ...
It was theorized that positive selection for shovel-shaped incisors over the spatulate incisors is more commonly found within cultures that used their teeth as tools due to a greater structural strength in increased shovel-shaped incisors. [2] In some instances, incisors can present a more pronounced version of this called double shovel-shaped.
These structures show an incredible diversity throughout crustaceans but generally are very much flattened and leaf-like. The two pairs are normally positioned very close together and their apical parts generally are in direct contact with the mandible. [5] [page needed]
What is the meaning of different teeth dream scenarios? If you dream your teeth are falling out: If you dream your teeth are falling out, you may be feeling unbalanced or self-sabotaging.
The maxilla is the main bone of the upper jaw. The premaxilla is a smaller bone forming the anterior of the animal's upper jaw. The dentary is the main bone that forms the lower jaw (mandible). The predentary is a smaller bone that forms the anterior end of the lower jaw in ornithischian dinosaurs; it is always edentulous and supported a horny ...