''Ammonicera'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of minute
sea snail
Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...
s,
marine gastropod
Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda ().
This class comprises snails and slugs from saltwater, freshwater, and fro ...
mollusc
Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...
s or
micromollusk
A micromollusc is a shelled mollusc which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine molluscs, although in addition, numerous species of land snails and freshwater molluscs also ...
s in the
family
Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Omalogyridae.
[Bouchet, P.; Gofas, S. (2012). ''Ammonicera'' Vayssière, 1893. Accessed through: World Register of Marine * At http://www.marinespecies.org/aphia.php?p=taxdetails&id=138275 on 2012-08-31] They are found in various locations such as the Eastern Pacific coasts of the United States and Mexico, Japan, and the Mediterranean.
This genus comprises the smallest gastropods known, featuring discoid, planispiral shells that typically measure in the adult state 1 mm or even less in size. The
protoconch
A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called " ...
is characterized by distinct ridges and grooves. The
teleoconch
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium ...
typically displays prominent
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 sc ...
, though it is occasionally weak. The
aperture
In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...
ranges from rounded to subquadrate.
The diet of the Ammonicera is not confirmed, however, based on the diets of other Omalogyridae, it is assumed to feed on several algal species in its habitat.
Species
Species within the genus ''Ammonicera'' include:
* ''
Ammonicera albanyensis''
Rubio & Rolán, 2020
* ''
Ammonicera albospeciosa''
Rolán, 1992
* ''
Ammonicera andresi''
J. D. Oliver & Rolán, 2015
* ''
Ammonicera angulata''
Sleurs, 1985
* ''
Ammonicera arrondoi''
J. D. Oliver & Rolán, 2015
* ''
Ammonicera aurea''
Waki, Rolán, Noseworthy, H.-S. Kang & K.-S. Choi, 2017
* ''
Ammonicera binodosa''
Sleurs, 1985
* ''
Ammonicera burnayi''
Rolán, 1991
* ''
Ammonicera caledonica''
Rubio & Rolán, 2020
* ''
Ammonicera chosenica''
Chernyshev, 2003
* ''
Ammonicera circumcirra''
Rolán, 1992
* ''
Ammonicera columbretensis''
J. D. Oliver & Rolán, 2015
* ''
Ammonicera consilii''
Antit, Gofas & Taviani, 2024
* ''
Ammonicera croata''
Rubio & Rolán, 2020
* † ''
Ammonicera eocaenica''
(Allix, 1923)
* ''
Ammonicera extracarinacostata''
Sleurs, 1985
* ''
Ammonicera familiaris''
Rolán, 1992
* ''
Ammonicera fischeriana
''Ammonicera fischeriana'' is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Description
The length of the shell attains 0.8 mm.
(Original description in French) A very small, discoidal, planorbifor ...
''
(Monterosato, 1869)
* ''
Ammonicera galaica''
J. D. Oliver & Rolán, 2015
* ''
Ammonicera gonzalezi''
Rolán & Rubio, 2017
* ''
Ammonicera japonica''
Habe, 1972
* ''
Ammonicera lignea''
(Palazzi, 1988)
* ''
Ammonicera lineofuscata''
Rolán, 1992
* ''
Ammonicera mcleani''
Sartori & Bieler, 2014
* ''
Ammonicera mexicana''
Sartori & Bieler, 2014
* ''
Ammonicera minortalis''
Rolán, 1992
* ''
Ammonicera multistriata''
Rolán, 1991
* ''
Ammonicera nodicarinata
''Ammonicera nodicarinata'' is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Distribution
This marine species occurs off Papua New Guinea; also off Réunion
Réunion (; ; ; known as before 1848) i ...
''
(Sleurs, 1985)
* ''
Ammonicera nodulosa''
J. D. Oliver & Rolán, 2015
* ''
Ammonicera nolai''
Rolán, 1991
* ''
Ammonicera oteroi''
Rolán, 1991
* ''
Ammonicera pascuensis''
Rubio & Rolán, 2020
* ''
Ammonicera plana''
Simone, 1997
* ''
Ammonicera plicata''
Sleurs, 1985
* ''
Ammonicera robusta''
Rolán, 1991
* ''
Ammonicera rota
''Ammonicera rota'' is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Description
The size of the shell attains 0.7 mm.
(Original description) The shell is discoid, flattened on both sides but slightly s ...
''
(Forbes & Hanley, 1850)
* ''
Ammonicera rotundata''
(Palazzi, 1988)
* ''
Ammonicera san''
Rolán & Peñas, 2009
* ''
Ammonicera sculpturata''
Rolán, 1992
* ''
Ammonicera shornikovi''
Chernyshev, 2003
* ''
Ammonicera sleursi''
Sartori & Bieler, 2014
* ''
Ammonicera sucina''
(Laseron, 1954)
* ''
Ammonicera superstriata''
J. D. Oliver & Rolán, 2015
* ''
Ammonicera tahitiensis''
Rubio, Rolán & Letourneux, 2020
* ''
Ammonicera tenuicostata''
Sleurs, 1985
* ''
Ammonicera tomalba''
Rubio & Rolán, 2020
* ''
Ammonicera tomensis''
Rubio & Rolán, 2020
* ''
Ammonicera vangoethemi''
(Sleurs, 1985)
* ''
Ammonicera verdensis''
Rolán, 1991
* ''
Ammonicera vladivostokensis''
Chernyshev, 2003
See also
*
Smallest organisms The smallest organisms found on Earth can be determined according to various aspects of organism size, including volume, mass, height, length, or genome size.
Given the incomplete nature of scientific knowledge, it is possible that the smallest or ...
References
* Vaught, K.C. (1989). ''A classification of the living Mollusca''. American Malacologists: Melbourne, FL (USA). . XII, 195 pp.
* Bieler R & Mikkelsen P. (1998), Ammonicera in Florida - Notes on the smallest living gastropod in the United States and comments on other species of Omalogyridae (Heterobranchia); The Nautilus, 111(1):1-12, 1998
* Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). ''European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification''. Collection Patrimoines Naturels, 50: pp. 180–213
* Rolán E., 2005. ''Malacological Fauna From The Cape Verde Archipelago. Part 1, Polyplacophora and Gastropoda''
* Spencer, H.; Marshall. B. (2009). ''All Mollusca except Opisthobranchia.'' In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp
External links
Vayssiere, A. 1893. ''Observations zoologiques anatomiques sur l'Ammonicera, nouveau genre de gasteropode prosobranche''. Annales de la Faculte des Sciences de Marseille, 3 15-28 1 pl.*
{{Taxonbar, from=Q4747289
Omalogyridae
Gastropod genera