Cylindrobulla is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of sea snail

Sea snail

Sea snail is a common name for those snails that normally live in saltwater, marine gastropod molluscs....

s or bubble snails, marine

Marine (ocean)

Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

 gastropod mollusks in the clade Sacoglossa

Sacoglossa

Sacoglossa, commonly known as the sacoglossans or the "sap-sucking sea slugs", are a clade of small sea slugs and sea snails, marine gastropod mollusks that belong to the clade Heterobranchia...

.

Cylindrobulla is the type genus of the family Cylindrobullidae and it is the only genus in the family.

Taxonomy

The suborder Cylindrobulloidea used to be recognized as monogeneric suborder; in other words there was only one family in the suborder, the family Cylindrobullidae, and only one genus Cylindrobulla.

1996 taxonomy

It was treated by Jensen (1996) as a sister group of Sacoglossa

Sacoglossa

Sacoglossa, commonly known as the sacoglossans or the "sap-sucking sea slugs", are a clade of small sea slugs and sea snails, marine gastropod mollusks that belong to the clade Heterobranchia...

 and placed it in the new order Cylindrobullacea.

1998 taxonomy

Mikkelsen (1998) has argued that the genus Cylindrobulla actually belongs in Oxynoacea within shelled Sacoglossa

Sacoglossa

Sacoglossa, commonly known as the sacoglossans or the "sap-sucking sea slugs", are a clade of small sea slugs and sea snails, marine gastropod mollusks that belong to the clade Heterobranchia...

. This change in taxonomy was suggested on the basis of the similarity in many characteristics: digestive, sexual, pallial (= concerning the mantle

Mantle (mollusc)

The mantle is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself.In many, but by no means all, species of molluscs, the epidermis of the mantle secretes...

), and the nervous system.

2005 taxonomy

According to the taxonomy 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...

, is the Cylindrobullidae the only family in the superfamily Cylindrobulloidea and Cylindrobulloidea is the only superfamily within the group Cylindrobullida in the infomal group Opisthobranchia

Opisthobranchia

Opisthobranchs are a large and diverse group of specialized complex marine gastropods previously united under Opisthobranchia within the Heterobranchia, but no longer considered to represent a monophyletic grouping...

.

According to the 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...

 the family Cylindrobullidae has no subfamilies.

2010 taxonomy

Molecular phylogeny

Molecular phylogeny

Molecular phylogenetics is the analysis of hereditary molecular differences, mainly in DNA sequences, to gain information on an organism's evolutionary relationships. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree...

 analysis by Maeda et al. (2010) have confirmed placement of Cylindrobulla within Sacoglossa

Sacoglossa

Sacoglossa, commonly known as the sacoglossans or the "sap-sucking sea slugs", are a clade of small sea slugs and sea snails, marine gastropod mollusks that belong to the clade Heterobranchia...

.

Genera

Species within the genus Cylindrobulla include:

• Cylindrobulla beauii
  Cylindrobulla beauii
  Cylindrobulla beauii is a species of sea snail, a marine gastropod mollusk in the family Cylindrobullidae.Cylindrobulla beauii is the type species of the genus Cylindrobulla....
  
  P. Fischer, 1857 - the type species of the genus Cylindrobulla
• Cylindrobulla gigas
  Cylindrobulla gigas
  Cylindrobulla gigas is a species of sea snail, a marine gastropod mollusk in the family Cylindrobullidae....
  
  Mikkelsen, 1998
• Cylindrobulla phuketi Jensen, 1990
• Cylindrobulla sculpta G. Nevill & H. Nevill, 1869
• Cylindrobulla turtoni Bartsch, 1915
• Cylindrobulla xishaensis Lin, 1978

Synonyms:

• Cylindrobulla californica Hamatani, 1971 is a synonym for Ascobulla californica (Hamatani, 1971)
• Cylindrobulla fragilis (Jeffreys, 1856) is a synonym for Ascobulla fragilis
  Ascobulla fragilis
  Ascobulla fragilis is a species of sea snail, a marine gastropod sacoglossan mollusk in the family Volvatellidae.The complete nucleotide sequence of the mitochondrial genome of Ascobulla fragilis has been available since 2008....
  
  (Jeffreys, 1856)
• Cylindrobulla japonica Hamatani, 1969 is a synonym for Ascobulla japonica (Hamatani, 1969)

See also

• Ascobulla
  Ascobulla
  Ascobulla is a genus of sea snails, bubble snails, a marine gastropod sacoglossan mollusk in the family Volvatellidae. -Species:Species within the genus Ascobulla include:* Ascobulla californica...
  
  - species in this genus looks externally the same, but they differ in internal anatomy. Ascobulla belongs to Volvatellidae
  Volvatellidae
  Volvatellidae is a family of sea snails, marine gastropod mollusks in the superfamily Oxynooidea.This family has no subfamilies.-Genera:There are two genera in the family Volvatellidae:* Ascobulla Marcus, 1972* Volvatella Pease, 1860...
  
  .

External links

• http://www.seaslugforum.net/showall/ascospp