''Callogaza'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
of
sea snails,
marine gastropod mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...
s in the
family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
Margaritidae
Margaritidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P. (2012). Margaritidae. Accessed through: World Register ...
.
Description
The shells of the species in this genus are thin-walled and almost transparent. Because of this, they are iridescent. The outer
lip
The lips are the visible body part at the mouth of many animals, including humans. Lips are soft, movable, and serve as the opening for food intake and in the articulation of sound and speech. Human lips are a tactile sensory organ, and can be ...
is deflected. A flat callus of the inner lip covers completely or only in part the wide
umbilicus (but only in fully grown species). These features form a
synapomorphy
In phylogenetics, an apomorphy (or derived trait) is a novel character or character state that has evolved from its ancestral form (or plesiomorphy). A synapomorphy is an apomorphy shared by two or more taxa and is therefore hypothesized to hav ...
with the genus ''
Gaza''.
The
sculpture
Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts. Durable ...
of ''Callogaza'' has stronger spiral and axial lines, in contrast with the almost uniform sculpture of ''Gaza''. ''Calogaza'' possesses strong, elevated spiral cords in the upper part of each
whorl. These are colored with brown spots.
Species
Species within the genus ''Callogaza'' include:
* ''
Callogaza colmani''
Hickman, 2012
* ''
Callogaza frederici''
(E. A. Smith, 1906)
* ''
Callogaza sericata''
(Kira, 1959)
* ''
Callogaza watsoni''
Dall, 1881
;Species brought into synonymy:
* ''Callogaza rotella''
Dall, 1881: synonym of ''Microgaza rotella rotella''
(Dall, 1881)
* ''Callogaza superba''
Dall, 1881: synonym of ''
Gaza superba''
(Dall, 1881)
References
External links
Luiz Ricardo L. Simone & Carlo M. Cunha, ''Revision of genera Gaza and Callogaza (Vetigastropoda, Trochidae), with description of a new Brazilian species''; Zootaxa1318: 1–40 (2006)
{{Taxonbar, from=Q5022853
Margaritidae