This study provides evidence that the suspension-feeding blue mussel, Mytilus edulis, uses biochemical cues to recognize its food. We identified lectins in mucus from the gills and labial palps, two pallial organs involved in the feeding process. These compounds were able to agglutinate rabbit and horse erythrocytes (RBC) and several species of marine microalgae representing different families....

Animals sometimes develop conspicuous projections on or near their heads as, e.g., weaponry, burrowing or digging tools, and probes to search for resources. The frontal projections that insects generally use to locate and assess resources are segmented appendages, including antennae, maxillary palps, and labial palps. There is no evidence to date that arthropods, including insects, use projecti...

Previous studies on proximal 3R have cytologically localized the dominant homeotic loci Antennapedia (Antp), Multiple Sex Comb (Msc), Nasobemia (Ns), and Extra Sex Comb (Scx). In this study we set out to find the site of the proboscipedia (pb) locus. In order to accomplish this, four new alleles of this homeotic gene were induced with gamma rays. Genetic and cytogenetic analyses have shown that...

The head anatomy of Pselaphus heisei (Pselaphitae) is described and documented. structural features are evaluated in comparison with findings presented earlier studies on the subfamily, a special focus correlations predacious habits groundplan Pselaphinae. We found tentorium, labrum, maxillary palps, shape head, system dorsal pits sulci highly variable within reflecting multiple transformations...

A new Pselaphinae rove beetle species belonging to the genus Geopselaphus Jeannel, 1956, G. bullonorum sp. nov. , from a cave in south Spain is described and diagnosed. Important morphological features of are listed photographed. The shows significant troglomorphy, such as reduction eyes (only three unpigmented ommatidia) an extraordinary general elongation body (especially head) appendages (an...

Talon cusp is a rare developmental anomaly that occurs most commonly on the lingual side of the incisors. Occurrence of the labial talon cusp is rare in the dental literature. Till date only seven cases of isolated nonsyndromic labial talon cusps have been reported in the maxillary permanent dentition. However, a few cases of syndromic labial talon cusps and faciolingual talon cusps have been r...

The Drosophila bone morphogenetic protein encoded by decapentaplegic (dpp) controls ventral head morphogenesis by expression in the head primordia, eye-antennal imaginal discs. These are epithelial sacs made of two layers: columnar disc proper cells and squamous cells of the peripodial epithelium. dpp expression related to head formation occurs in the peripodial epithelium; cis-regulatory mutat...

PURPOSE Maxillary implant overdentures are often designed without palatal coverage to maximize wearer comfort. Although palateless dentures have been reported to be less rigid than conventional dentures, and require reinforcement to prevent complications, there is little documentation about the effects of such reinforcement. The purpose of this study was to examine the effects of reinforcement ...

Mosquitoes are vectors for a number of diseases, causing some of the world's most severe health problems. Anopheles species are vectors of malaria, Culex quinquefasciatus spreads filariasis, and Aedes aegypti is the main vector of Dengue fever. In female mosquitoes, olfactory cues are strongly involved in host-seeking behaviour. Male mosquitoes do hardly react to host-odours, but olfaction play...

a case of a compound odontoma which caused delayed eruption of right maxillary central incisor in a ten year old girl is presented with clinical and radiographic findings. the patient presented with complaint of a hard painless swelling in the right anterior region of the maxilla and absence of right maxillary central incisor. after clinical examination, periapical and occlusal radiographs of t...