Modulus (gastropod)
Modulus is a genus of small sea snails, marine gastropod molluscs in the family Modulidae.
Characteristics
The shell is turbinate and umbilicate, bearing a general resemblance to members of the family Turbinidae or allied groups. However, it differs significantly in the siphonate nature of its aperture. The aperture is round, with the outer lip continuous except at the base, which is truncated by a sharply and obliquely deflected short siphonal canal.Species
Species within the genus Modulus include:Modulus ambiguus Dautzenberg, 1910Modulus bayeri Petuch, 2001Modulus bermontianus Petuch, 1994Modulus cerodes A. Adams, 1851Modulus danielsi Petuch & Berschauer, 2023Modulus disculus Modulus floridanus Conrad, 1869Modulus guernei Dautzenberg, 1900Modulus hennequini Petuch, 2013Modulus honkerorum Petuch, 2013Modulus hunahpu Petuch & Berschauer, 2023Modulus kaicherae Petuch, 1987Modulus modulus - the type species, known as the "button snail"Modulus nodosus Macsotay & Campos, 2001Modulus pacei Petuch, 1987Modulus turbinoides;Taxa inquirenda:Modulus duplicatus A. Adams, 1851Modulus morleti P. Fischer, 1882 Modulus obliquus A. Adams, 1851 Modulus obtusatus
;Species brought into synonymy:Modulus calusa Petuch, 1988: synonym of Trochomodulus calusa Modulus canaliculatus Mörch, 1876: synonym of Modulus modulus Modulus candidus Petit de la Saussaye, 1853: synonym of Indomodulus tectum Modulus carchedonius : synonym of Trochomodulus carchedonius Modulus catenulatus : synonym of Trochomodulus catenulatus Modulus cidaris Reeve, 1848: synonym of Modulus tectum : synonym of Indomodulus tectum Modulus convexior Mörch, 1876: synonym of Modulus modulus Modulus dorsuosus Gould, 1853: synonym of Modulus disculus Modulus krebsii Mörch, 1876: synonym of Modulus modulus Modulus lenticularis : synonym of Modulus modulus Modulus lindae Petuch, 1987: synonym of Conomodulus lindae Modulus obliquatus : synonym of Modulus obliquus A. Adams, 1851 Modulus perlatus : synonym of Modulus modulus Modulus pisum Mörch, 1876: synonym of Modulus modulus Modulus tectum : synonym of Indomodulus tectum Modulus trochiformis Souleyet, 1852: synonym of Trochomodulus catenulatus Modulus unidens : synonym of ''Modulus modulus''