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When the light is shining through the collar, it is possible to make out the individual egg capsules within it. Sand collars are the characteristic egg masses of one family of sea snails, the moon snails, marine gastropod mollusks in the family Naticidae. These egg masses are often found washed up either whole, or sometimes in fragments, on ...
Naticidae, common name moon snails or necklace shells, is a family of medium to large-sized predatory sea snails, marine gastropod molluscs in the clade Littorinimorpha. The shells of the species in this family are mostly globular in shape.
The sand collar egg mass of Euspira catena. The rounded shell is thin and polished and brownish-yellow, with a row of reddish markings just below the suture of the last whorl. It can grow to about 3 cm (1 in) and has a short spire and seven rounded whorls separated with distinct sutures. The lowest whorl occupies about 90% of the volume.
The gonopore acts as an opening through which eggs are deposited. The opening leads into the mantle tubule, in which eggs flow from the oviduct and ovary. The mantle tubule produces three things, yolk; carries most of the nutrients needed to develop a healthy offspring, egg capsule formation, and sperm reception and storage; where fertilization ...
Neverita didyma, common name the bladder moon snail or moon shell, is a species of predatory sea snail, a marine gastropod mollusc in the family Naticidae, the moon snails. [ 1 ] Egg mass
The Naticinae are a subfamily of medium to large-sized predatory sea snails, marine gastropod molluscs in the family Naticidae, the moon snails. [1] The Naticinae are characterized by their calcareous operculum and by the presence of a distinct funicle within the umbilicus, which is observable in most species. It is mainly a tropical group ...
The details and morphology of the ovipositor vary, but typically its form is adapted to functions such as preparing a place for the egg, transmitting the egg, and then placing it properly. For most insects, the organ is used merely to attach the egg to some surface, but for many parasitic species (primarily in wasps and other Hymenoptera ), it ...
Drawing of Natica stercusmuscarum. Shells of Naticarius stercusmuscarum can reach a size of 25–56 millimetres (0.98–2.20 in). [2] The shell surface is yellow or color cream with dense, small, red-brown dots.