Geotrochus

Geotrochus
Shell of Geotrochus subtricolor (syntype at MNHN, Paris)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Trochomorphidae
Genus:	Geotrochus van Hasselt, 1823
Type species
Helix conusL. Pfeiffer, 1841
Synonyms
ChiroktismaGude, 1913 Helix (Geostrochus)van Hasselt, 1823 (incorrect subsequent spelling) Helix (Geotrochus)van Hasselt, 1823

Geotrochus is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Trochomorphidae. ^[1]

General characteristics

The shell has a trochiform shape and is an imperforate structure. The whorls are flattened. The upper surface is covered with numerous raised spiral lirae. Conversely, the lower surface is shining and is finely striated transversely. Finally, the margins of the aperture are acute, and they are not reflexed. ^[2]

Species

Species within the genus Geotrochus include:

• Geotrochus affinis (E. A. Smith, 1894)
• Geotrochus bicolor (Martens, 1864)
• Geotrochus conicoides (Metcalfe, 1851)
• Geotrochus conus (L. Pfeiffer, 1841)
• Geotrochus kinabaluensis (E. A. Smith, 1895)
• Geotrochus kitteli Vermeulen, Liew & Schilthuizen, 2015
• Geotrochus labuanensis (L. Pfeiffer, 1864)
• Geotrochus meristotrochus Vermeulen, Liew & Schilthuizen, 2015
• Geotrochus multicarinatus (Boettger, 1890)
• Geotrochus niahensis (Godwin-Austen, 1891)
• Geotrochus oedobasis Vermeulen, Liew & Schilthuizen, 2015
• Geotrochus paraguensis (E. A. Smith, 1893)
• Geotrochus rimatus Vermeulen, 1997
• Geotrochus scolops Vermeulen, Liew & Schilthuizen, 2015
• Geotrochus spilokeiria Vermeulen, Liew & Schilthuizen, 2015
• Geotrochus subscalaris Vermeulen, Liew & Schilthuizen, 2015
• Geotrochus subtricolor (Mabille, 1887)
• Geotrochus sylvanus (Dohrn & C. Semper, 1862)
• Geotrochus verticillatus van Benthem Jutting, 1959
• Geotrochus whiteheadi (E. A. Smith, 1895)
• † Geotrochus xinanensis Yü & Zhang, 1982

References

1. MolluscaBase eds. (2020). MolluscaBase. Geotrochus van Hasselt, 1823. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=869645 on 2020-12-20
2. Gude, G.K. (1913). "Definitions of further new genera of Zonitidae". Proceedings of the Malacological Society of London. 10: 390. This article incorporates text from this source, which is in the public domain .

• van Hasselt, J. C. (1823). Uittreksel uit een' brief van den Heer J. C. van Hasselt, aan den Heer C. J. Temminck, geschreven uit Tjecande, Residentie Bantam, den 28sten December 1822. Algemeene Konst- en Letter-bode voor het Jaar II Deel. (no. 35): 130-133.

page(s): 233; note: Three originally included nominal species (obtusus, turriculatus, zonatus), none of them diagnosed separately, therefore all nomina nuda

• Bank, R. A. (2017). Classification of the Recent terrestrial Gastropoda of the World. Last update: July 16, 2017.

External links

• Pilsbry, H.A. (1913). "The status of Geotrochus van Hasselt". The Nautilus. 49 (2).