Amphidromus inversus

Amphidromus inversus is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Camaenidae. [1]

Amphidromus inversus
juvenile Amphidromus inversus
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
Superfamily:
Helicoidea
Family:
Camaenidae
Subfamily:
Camaeninae
Genus:
Amphidromus
Subgenus:
Amphidromus
Species:
A. inversus
Binomial name
Amphidromus inversus
Synonyms
  • Bulimus contusus Reeve, 1848 (junior synonym)
  • Bulimus elongatus Hombron & Jacquinot, 1854 (junior synonym)
  • Bulimus jayanus I. Lea, 1841 (junior synonym)
  • Helix inversa O. F. Müller, 1774 (original combination)

Like most members of the subgenus Amphidromus, it is chirally dimorphic: within the same populations, both dextral (clockwise-coiled) and sinistral (anticlockwise-coiled) individuals co-exist. This is one of the very few cases of genetic antisymmetry known in nature. Among the subgenus Amphidromus, A. inversus stands out because since c. 2004, it has been the focus of studies aimed at understanding the evolution of chiral dimorphism. Most of these studies have taken place on the Malaysian island of Kapas.

Subspecies
  • Amphidromus inversus andamensis (L. Pfeiffer, 1871)
  • Amphidromus inversus annamiticus (Crosse & P. Fischer, 1863)
  • Amphidromus inversus koperbergi Laidlaw & Solem, 1961

Distribution

Sumatra, Peninsular Malaysia, Thailand

Description
apertural view of a shell of Amphidromus inversus

Ecology
A batch of eggs of the land snail Amphidromus inversus, found in a piece of dead wood on the island of Kapas, Terengganu, Malaysia

Schilthuizen et al. (2005) described spatial structure of population of Amphidromus inversus in Malaysia.[2]

References
  1. MolluscaBase eds. (2020). MolluscaBase. Amphidromus inversus (O. F. Müller, 1774). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1245795 on 2020-05-17
  2. Schilthuizen, M.; Scott, B. J.; Cabanban, A. S.; Craze, P. G. (2005). "Population structure and coil dimorphism in a tropical land snail". Heredity. 95 (3): 216–220. doi:10.1038/sj.hdy.6800715. PMID 16077741.

Further reading
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