Amathinidae

Amathinidae, is a taxonomic family mostly consisting of small and minute sea snails, marine heterobranch gastropod molluscs or micromolluscs in the superfamily Pyramidelloidea.
Together with Pyramidellidae, Ebalidae, Turbonillidae, Odostomidae and other genera they form the superfamily Pyramidelloidea.
Little is known on the biology of the group, but some data on the anatomy and systematic position is given by Ponder and Huber.

1999 taxonomy

Genera within the family Amathinidae according to the taxonomy of Schander, Van Aartsen & Corgan include:

Genus Amathina J. E. Gray, 1842
Genus Amathinoides Sacco, 1896
Genus Carinorbis Conrad, 1862
Genus Cyclothyca Stearns, 1861
Genus Faluniella Cossman, 1921
Genus Iselica Dall, 1918
Genus Leucotina A. Adams, 1860
Genus Phasianema Wood, 1842
Genus Plicifer H. Adams, 1868

2005 taxonomy

This family has no subfamilies.

Genera

This family presently comprises less than 100 recent and fossil species divided into seven genera: Amathina, Amathinoides, Carinorbis, Cyclothyca, Iselica, Leucotina and Phasianema.
Two additional genera, Faluniella and Plicifer may also be a part of Amathinidae:Faluniella Cossmann, 1921
Genera within the family Amathinidae include:Amathina Gray, 1842Cyclothyca Stearns, 1891Iselica Dall, 1918Leucotina A. Adams, 1860Monotygma G. B. Sowerby II, 1839Plicifer H. Adams, 1868

† Raulinia Mayer, 1864

;Genera brought into synonymy:Adelactaeon Cossmann, 1895: synonym of Leucotina A. Adams, 1860Amathinoides Sacco, 1896 † accepted as Clathrella Récluz, 1864 accepted as Carinorbis Conrad, 1862Clathrella Récluz, 1864 accepted as Carinorbis Conrad, 1862Isapis H. Adams & A. Adams, 1854 accepted as Iselica Dall, 1918 Myonia A. Adams, 1860: synonym of Leucotina A. Adams, 1860

Anatomy

The shells are usually flat without coiling. They usually have strong axial ribs. Ponder described giant neurons in the cerebral ganglion.