Reception of odorants by two main head appendages, antennae and maxillary palps, is essential for insects' survival and reproduction. There is growing evidence in the literature suggesting that the proboscis is also an olfactory appendage and its function as an additional "antenna" has been previously proposed. We surmised that movements of the labrum toward a blood vessel might be chemically o...

The genus Pallisentis has been mostly found among the freshwater fishes of Channidae family. ophiocephali is characterized with some unique characters proboscis, hooks, and spines. However, initial description a little sketchy yet not updated. present study communicates detail morphology an acanthocephalan species obtained from two host family—Channa striatus Channa punctatus—during one-year su...

In some insects the proboscis is extended to imbibe a sugar solution if the concentration of sugar applied to the chemosensilla exceeds the behavioural threshold value. Recently, I found a reversal of the threshold values of this "proboscis extension reflex" (PER) in the blow fly (Phormia regina M.) for glucose and fructose. It depended on maturation and physiological conditions, both of which ...

The ultrastructure and chemical composition of the proboscis hooks and surrounding tegument of Acanthocephalus lucii (Müller, 1776), a parasite of European perch, Perca fluviatilis Linnaeus, were examined using scanning (SEM) and transmission (TEM) electron microscopy and X-ray microanalysis (EDXA). The blade of middle hooks consists of three layers: an outer homogeneous layer, an inner heterog...

Acanthogyrus (Acanthosentis) tilapiae parasites were collected from the intestines of 300 fish belonging to three tilapia species sourced at the River Nile, Giza, Egypt. The proboscis of the parasite was characterized by three rows of hooks that curved towards the posterior of the body. The first row is supported by unmodified hooks. The parasite tegument has a series of alternative folds and a...

While tear-feeding in moths on mammals is widespread, there have been no reports of this behaviour in Madagascar and none on birds. We report that a moth, Hemiceratoides hieroglyphica belonging to the Calpini, a generally fruit-feeding or blood-feeding lineage of noctuids, attacks sleeping birds in Madagascar. This moth is able to intrude its sharply tipped proboscis into a closed bird's eye. T...

Small changes in container shape or in contact angle can give rise to large shifts of liquid in a microgravity environment. These shifts can be used as a basis for accurate determination of contact angle. We describe container shapes, designed for a forthcoming USMG2 experiment, in the form of a circular cylinder with two diametrically opposed “canonical proboscis” protrusions. Computational st...