Trissexodontidae
Encyclopedia
Trissexodontidae is a family
of land snail
s, gastropods in the superfamily Helicoidea
(according taxonomy of the Gastropoda by Bouchet & Rocroi, 2005
).
This family has no subfamilies. Family Trissexodontidae has been separated from families Hygromiidae
and Helicodontidae
and some authors still classify them in those families.
, northwest Africa, Azores
, Canary Islands, Madeira and Cape Verde
.
of species in the family Trissexodontidae are flat and they are regularly ribbed. They have no hairs.
Description of reproductive system
was summarized by Prieto et al. (1993).
In this family, the number of haploid chromosome
s is only known for the genus Oestophora
(n=30).
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
of land snail
Land snail
A land snail is any of the many species of snail that live on land, as opposed to those that live in salt water and fresh water. Land snails are terrestrial gastropod mollusks that have shells, It is not always an easy matter to say which species are terrestrial, because some are more or less...
s, gastropods in the superfamily Helicoidea
Helicoidea
Helicoidea is a taxonomic superfamily of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Stylommatophora.-Families:There are 19 families within the superfamily Helicoidea according to Bouchet & Rocroi .* Helicidae...
(according taxonomy of the Gastropoda by Bouchet & Rocroi, 2005
Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...
).
This family has no subfamilies. Family Trissexodontidae has been separated from families Hygromiidae
Hygromiidae
Hygromiidae is a taxonomic family of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.-Anatomy:...
and Helicodontidae
Helicodontidae
Helicodontidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Eupulmonata .- Taxonomy :...
and some authors still classify them in those families.
Distribution
Distribution of Trissexodontidae include Iberian peninsulaIberian Peninsula
The Iberian Peninsula , sometimes called Iberia, is located in the extreme southwest of Europe and includes the modern-day sovereign states of Spain, Portugal and Andorra, as well as the British Overseas Territory of Gibraltar...
, northwest Africa, Azores
Azores
The Archipelago of the Azores is composed of nine volcanic islands situated in the middle of the North Atlantic Ocean, and is located about west from Lisbon and about east from the east coast of North America. The islands, and their economic exclusion zone, form the Autonomous Region of the...
, Canary Islands, Madeira and Cape Verde
Cape Verde
The Republic of Cape Verde is an island country, spanning an archipelago of 10 islands located in the central Atlantic Ocean, 570 kilometres off the coast of Western Africa...
.
Genera
Genera within the family Trissexodontidae include:- Caracollina Beck, 1837
- Gasullia Ortiz de Zárate López, 1962
- Gasulliella Gittenberger, 1980 - with the only one species Gasulliella simplicula (Morelet, 1845)
- Gittenbergeria Schileyko, 1991
- Mastigophallus Hesse, 1918 - with the only species Mastigophallus rangianus (Michaud, 1831)
- OestophoraOestophoraOestophora is a genus of land snail, a gastropod in the Trissexodontidae family.- Distribution :Distribution of genus Oestophora include western Iberian peninsula, north Africa and Azores.- Description :...
Hesse, 1907 - Oestophorella Pfeffere, 1929
- TrissexodonTrissexodonTrissexodon is a genus of land snail, a gastropod in the Trissexodontidae family.Trissexodon is the type genus of the family Trissexodontidae.- Species :It contains the following species:* Trissexodon constrictus - type species...
Pilsbry, 1895 - type genus of the family Trissexodontidae - SpirorbulaSpirorbulaSpirorbula is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Hygromiidae, the hairy snails and their allies.-Distribution:Distribution of the genus Spirorbula include from Madeira and Porto Sancto....
Lowe, 1852 - probable classification, from MadeiraMadeiraMadeira is a Portuguese archipelago that lies between and , just under 400 km north of Tenerife, Canary Islands, in the north Atlantic Ocean and an outermost region of the European Union...
and Porto Sancto - SuboestophoraSuboestophoraSuboestophora is a genus of gastropod in the family Trissexodontidae.- Species :Genus Suboestophora contains the following species:* Suboestophora altamirai * Suboestophora boscae...
Ortiz de Zárate López, 1962
Description
ShellsGastropod shell
The gastropod shell is a shell which is part of the body of a gastropod or snail, one kind of mollusc. The gastropod shell is an external skeleton or exoskeleton, which serves not only for muscle attachment, but also for protection from predators and from mechanical damage...
of species in the family Trissexodontidae are flat and they are regularly ribbed. They have no hairs.
Description of reproductive system
Reproductive system of gastropods
The reproductive system of gastropods varies greatly from one group to another within this very large and diverse taxonomic class of animals...
was summarized by Prieto et al. (1993).
In this family, the number of haploid chromosome
Chromosome
A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions.Chromosomes...
s is only known for the genus Oestophora
Oestophora
Oestophora is a genus of land snail, a gastropod in the Trissexodontidae family.- Distribution :Distribution of genus Oestophora include western Iberian peninsula, north Africa and Azores.- Description :...
(n=30).