<p>A infraoclusão de dentes decíduos pode ocorrer devido a fusão anatômica do cemento dentário com o osso alveolar, situação que denominamos como anquilose dentária. Esse evento, comum em molares decíduos, pode causar prejuízo no desenvolvimento da oclusão. O objetivo desse trabalho foi relatar a reabilitação de um molar decíduo infra-ocluído utilizando uma banda ortodôntica sobre o dente, cimento de ionômero de vidro modificado por resina encapsulado (Riva Ligh Cure, SDI, Brasil) e seu acompanhamento durante doze meses. Paciente de nove anos, do sexo feminino, compareceu ao consultório acompanhado de sua mãe com uma queixa estética. Após diagnostico de anquilose, foi realizada a restauração no elemento dentário em sessão única e realizado acompanhamento clínico e radiográfico durante doze meses. Ao final desse período observamos que o dente tratado permaneceu restaurado o que proporcionou a esfoliação das raízes do dente decíduo e consequentemente a erupção do dente permanente. Diante disso, concluímos que é possível tratar molares decíduos em infraoclusão com cimento de ionômero de vidro modificado por resina, no intuito de facilitar a realização do procedimento em sessão única e diminuir os riscos associados a um dente anquilosado não tratado precocemente.</p>

Calliostoma tupinamba isa new species from Southeastern Brazil, ranging from southern Rio de Janeiro to northern São Paulo, and found only on coastal islands, on rocks and sessile invertebrates at 3 to 5 meters of depth. Shell and soft part morphology is described here in detail. Calliostoma tupinamba is mainly characterized by a depressed trochoid shell; eight slightly convex whorls; a sharply suprasutural carina starting on the third whorl and forming a peripheral rounded keel; and a whitish, funnel-shaped and deep umbilicus, measuring about 5%–10% of maximum shell width. Calliostoma tupinamba resembles Calliostoma bullisi Clench & Turner, 1960 in shape, but differs from it in being taller and wider, having a smaller umbilicus and lacking a strong and large innermost spiral cord at its base. Finally, an identification key of Brazilian Calliostoma species is presented.

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The deep-water mollusks collected during the Marion Dufresne (MD55) expedition to the southeastern Brazilian coast in 1987 have been studied in several recent works. The present paper lists and diagnoses 19 species belonging to the vetigastropod families Calliostomatidae, Colloniidae, Margaritidae, and Solariellidae. A new species, Calliostoma valkuri sp. nov., is described. It is mainly characterized by a very short teleoconch I, with limits marked by conspicuous varices and sculpture consisting of 3 spiral threads; sculpture of the teleoconch II consisting of spiral cords with thorn-like projections; and the presence of two strongly marked cords on the median portion of the whorls. Based on the MD55 samples and complementary specimens from other expeditions, the following species have their geographical and/or bathymetrical range extended: Bathymophila euspira, Calliostoma gemmosum, Calliostoma rude, Callogaza watsoni, Gaza compta, Falsimargarita terespira, Homalopoma boffii, Lamellitrochus cancapae comb. nov., Lamellitrochus pourtalesi, Margarites imperialis, and Solariella quinni.

A cladistic analysis of the Tegulinae (Turbinidae) is presented using 132 morphological characters and 41 taxa. Tegulinae is recovered and is sister to Prisogaster niger (Prisogasterinae) within the family Turbinidae. This scenario, with Tegulinae as a subfamily within Turbinidae, corroborates with the most molecular analyses. Tegulinae comprises >40 extant species, belonging to eight genera. Morphological studies have not resolved the placement of Tegulinae within Trochoidea sufficiently, and the systematic positions of the genera have never been investigated as a primary objective. The present morphology‐based analysis of genus‐level relationships within Tegulinae provides a robust, phylogenetic diagnosis of each group, rooted on a firm hypothesis of evolutionary relationships. An additional search was performed to include the tegulines Omphalius nigerrimus and Carolesia blakei terminals using unweighted and implied weighting. Our morphological data provide a solid foundation for ensuing systematic research on Tegulinae, as well as Trochoidea, and evidence facilitating the diagnosis of generic and suprageneric groups.

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