from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The mouthparts of an organism such as an insect or a member of the Rotifera
from the GNU version of the Collaborative International Dictionary of English
- n.pl. The mouth parts of an insect, collectively, including the labrum, labium, maxillæ, mandibles, and lingua, with their appendages.
from The Century Dictionary and Cyclopedia
- n. In cntom., those mouth-parts which are employed in taking food and preparing it for swallowing.
- n. The teeth of the mastax or pharynx of rotifers; the calcareous mastacial armature of wheel-animalcules.
Sorry, no etymologies found.
The food particles a bdelloid ingests pass thru its jaws, called the trophi and which happen to be the only hard parts in their bodies.
Nearly all rotifers have chitinous jaws called trophi that grind and shred food.
The trophi are the only part of a rotifer that can be fossilized and have been found in amber dating back to the Eocene epoch (38-55 million years ago).
That's surprising -- the trophi can be preserved, though, right?
The trophi can be preserved, but they are not by themselves enough to identify species.
The picture below shows the trophi of this unidentified species of bdelloid.
Buccal appendages: the mouth parts excluding the labrum: see trophi.
Mouth-parts: a collective name including labrum, mandibles, maxillae, labium and appendages = trophi.
Abdomen yellowish brown, above sprinkled with dark brown, the edges of each segment with several small wart-like prominences; two first segments being also shagreened at the sides, beneath pitchy brown, segments at the base black with green reflections; the femora are pitchy brown; the tibiAe pale yellowish with black spines; the tarsi of a deeper yellow; head dark brown, the trophi and a narrow line on the cheeks yellowish; antennae somewhat ferruginous.
External differences apparently so small, and which might elsewhere be deemed inadequate to the establishment of genera, become important in this remarkable family, from their being confirmed by the structure of the trophi, and the strong distinctions exhibited in their females in every instance that has yet presented itself to me, wherever I have had the certainty of specific identity in these heterogynous insects, from the direct observation of my friends in Australia.
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