Tomocyclus

Tomocyclus
Shell of Tomocyclus simulacrum (syntype at MNHN, Paris)
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Architaenioglossa
Superfamily: Cyclophoroidea
Family: Megalomastomatidae
Genus:
Crosse & P. Fischer, 1872
Synonyms[1]

Megalomastoma (Tomocyclus) Crosse & P. Fischer, 1872

Tomocyclus is a genus of land snails, terrestrial gastropod mollusks in the subfamily Megalomastomatinae of the family Megalomastomatidae.[1]

Description

(Original description in Latin) The shell is perforated, turreted, and truncated. The aperture is subcircular and small. The peristome is double-layered: the inner layer is briefly projected inward, while the outer layer is broadly expanded, resembling a leaf. The upper margin of the outer lip is interrupted, with a unique, incised, and hollowed-out appearance.

The operculum is circular, corneous but relatively thick, and spirally wound. It is slightly flattened anteriorly and reinforced posteriorly by a blunt, rounded process. The margins of the operculum exhibit a somewhat lamellar structure. [2]

Species

  • Tomocyclus fistulosus F. G. Thompson, 1963
  • Tomocyclus gealei Crosse & P. Fischer, 1872
  • Tomocyclus guatemalensis (L. Pfeiffer, 1851)
  • Tomocyclus lunai Bartsch, 1945
  • Tomocyclus simulacrum (Morelet, 1849)
Synonyms
  • Tomocyclus constrictus Bartsch & J. P. E. Morrison, 1942: synonym of Tomocyclus simulacrum (Morelet, 1849) (junior synonym)
  • Tomocyclus copanensis (G. B. Sowerby I, 1850): synonym of Tomocyclus simulacrum (Morelet, 1849) (junior synonym)
  • Tomocyclus siphonis Bartsch & J. P. E. Morrison, 1942: synonym of Tomocyclus simulacrum (Morelet, 1849) (junior synonym)

References

  1. ^ a b MolluscaBase eds. (2022). MolluscaBase. Tomocyclus Crosse & P. Fischer, 1872. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=995577 on 2022-10-01
  2. ^ Crosse, H. & Fischer, P. (1872). "Diagnoses Molluscorum novorum, reipublicae Maxicanae incolarum". Journal de Conchyliologie. 20 (1): 76. Retrieved 31 January 2025.{{cite journal}}: CS1 maint: multiple names: authors list (link) Public Domain This article incorporates text from this source, which is in the public domain.
  • Bank, R. A. (2017). Classification of the Recent terrestrial Gastropoda of the World. Last update: July 16, 2017
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