rhinotheca


Also found in: Dictionary, Wikipedia.

rhinotheca

[¦rīn·ə′thē·kə]
(vertebrate zoology)
The horny sheath on the upper part of a bird's bill.
Mentioned in ?
References in periodicals archive ?
Excessive keratin buildup was present along the caudal half to two-thirds of both rhinotheca and gnathotheca although more pronounced on the upper bill.
The beak abnormalities had been observed for at least 2 years and included a progressive thickening of the left side of the rhinotheca and elongation of both the rhinotheca and gnathotheca.
Both the rhinotheca and the gnathotheca were markedly overgrown, and the distal third of the rhinotheca was deviated to the right.
It is also possible that the rapid tissue regrowth after surgery represented a benign proliferative response to damage sustained by the germinal tissue of the rhinotheca and not regrowth of tumor.
Key words: fracture, misaligned ossification, distraction osteogenesis, orthopedics, mandible, rhinotheca, avian, mute swan, Cygnus olor
The initial plan also included the placing a transfrontal sinus pin linked to the end of the rhinotheca with an elastic band to correct rhinothecal alignment.
Two weeks after surgery, the mandible and the rhinotheca were in correct physiologic position and the bird was able to eat normally.
The bird had also presented to the author's (D.H.) practice multiple times over the previous 7 years for routine grooming, and abnormal keratinization of the rhinotheca had been observed during that period, progressively worsening over time.
A full-thickness defect was present in the upper beak, involving approximately 40% of the center of the rhinotheca. An area of granulation tissue was evident at the proximal end of this defect.
During the examination, the bird fractured the left lateral margin of the rhinotheca by biting the towel being used to restrain it.
A 5-month-old female wild mallard duck (Anas platyrhynchos) was brought to the Wisconsin Humane Society's Wildlife Rehabilitation Center in June with a beak injury that resulted from a fish hook deeply embedded in the nares and rhinotheca. Over the following 7 weeks, the duck was confined to the facility while the injury was treated.
Case 9: A 27-year-old male blue and gold macaw was presented with a soft swelling on the right side of the rhinotheca. Radiograph results were suggestive of a focal granulomatous lesion.