The pigment patterns on tropical shells are of great beauty and diversity. Their mixture of
regularity and irregularity is fascinating. A particular pattern seems to follow particular rules …

External surface rings, internal growth lines and microgrowth bands in bivalve shells have
been used to estimate age and to investigate the effects of environmental factors such as …

In this chapter we discuss the mode and rate of growth in ammonoids, focusing primarily on
postembryonic growth. We first discuss the general mode of growth and then describe the …

The cuttlebone is a rigid buoyancy tank that imposes a depth limit on Sepia, the only living
speciose cephalopod genus with a chambered shell. Sections of 59 cuttlebones from a …

The internal architecture of chambered ammonoid conchs profoundly increased in
complexity through geologic time, but the adaptive value of these structures is disputed …

Ranging from simple to complex, the folded septa of the phragmocone characterize the
ammonoid clade and contribute much to their aesthetic appearance. However, many …

Nautiloids are the subject of speculation as to their threatened status arising from the
impacts of targeted fishing for the ornamental shell market. Life history knowledge is …

Study of Nautilus belauensis in its natural habitat in Palau, West Caroline Islands, shows
that growth is slow (0.1 millimeter of shell per day on the average) and decreases as …

Die Dekors auf den Gehäusen tropischer Meeresschnecken sind nicht nur beeindruckend
schön, sondern sie erzählen auch ein Stück biologischer Entwicklungsgeschichte. Die …

Capture-mark-recapture of Nautilus belauensis in Palau shows that (a) immature animals
added an average of 0.1 mm of shell per day at the ventral circumference (projected mean …