OBJECTIVES To immunocytochemically characterize the neural and glial elements of idiopathic full-thickness macular hole (FTMH) opercula excised during vitrectomy, and to correlate them with the outcome of surgery. METHODS Opercula were collected from eyes undergoing vitrectomy for stage 3 FTMH and processed for transmission electron microscopy, light epifluorescence, and laser scanning confoc...

Aminostratigraphies of Quaternary non-marine deposits in Europe have been previously based on the racemization of a single amino acid in aragonitic shells from land and freshwater molluscs. The value of analysing multiple amino acids from the opercula of the freshwater gastropod Bithynia, which are composed of calcite, has been demonstrated. The protocol used for the isolation of intra-crystall...

A new species of cicada, Cicadatra ziaraticasp. n., is described from Pakistan. Male genitalia, timbal and opercula are described and illustrated as important diagnostic characters. Biological notes are also provided. A key to the known Cicadatra of Pakistan is provided.

The human tendency to imitate gestures performed by conspecifics is automatic in nature. However, whether this automatic imitation can be considered as a true imitative phenomenon or only as a special instance of spatial compatibility is still being debated. New evidence suggests that automatic imitation, otherwise known as 'imitative compatibility', shall be considered as a phenomenon that ope...

the osteology of the suspensorial and opercular series in representatives of 49 genera and 41 families of eurypterygian fishes were studied. the suspensorium consists of the palatine, ectopterygoid, endopterygoid, metapterygoid, quadrate, symplectic, and hyomandibular bones. the hyomandibular foramen is present at the base of the anterior head. the opercular series consists of the preopercle, s...

Odontogenic lesions may present as enlarged opercula and result in the delayed eruption of teeth. This case report describes the clinical and microscopic features of a peripheral odontogenic fibroma in a 13-year-old boy that involved the overlying gingiva of a partially erupted, mandibular second molar. A differential diagnosis and treatment for lesions presenting as gingival enlargements in th...

Two new species of the genus Cicadatra Kolenati, C. ashrafi sp.n. and C. tandojamensis sp.n. are described from Pakistan. Male genitalia, timbals and opercula are described and illustrated as important diagnostic characters. Host affinity for one species is also provided. A key to the known species of Pakistani Cicadatra is also given.