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Taxon profile

species

Metaxia taeniolata (W.H. Dall, 1889)

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  family Triphoridae »  genus Metaxia

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Metaxia taeniolata

Author: Fernandes & Dias Pimenta

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Description

Shell elongated, slender and conical, reaching 5.0 mm in length, 1.1 mm in width. Protoconch narrow and elongated, with 3.5 to four whorls; first whorl dome shaped, with fine and numerous zigzag spiral cords, closely spaced; remainder whorls with convex, somewhat keeled outline, with predominant axial ribs and irregular, fine, somewhat spiral growth lines at the middle of the whorl. Teleoconch with up to eight convex whorls, and ~13 strong axial ribs on seventh whorl, crossed by four spiral cords per whorl, the first, adapical one, located just below suture is very thin on initial whorls, becoming stronger towards last whorls; prominent nodules formed at the crossing of axial ribs and the three abapical spiral cords, slightly larger on the median one; an additional very thin cord just above suture; last whorl with smooth or slightly wavy subperipheral cord; base short and concave; aperture almost round; outer lip thin; columellar lip sinusoidal. Teleoconch white and even translucent in well preserved shells, with light brown spots at the inter-nodular spaces of second spiral cord around the fifth to the sixth whorl, becoming well sharp in the seventh whorl; light brown protoconch.
Fernandes & Dias Pimenta, 2011. Taxonomic review of Metaxia (Gastropoda: Triphoridae) from Brazil, with description of a new species
Author: Jan Delsing

Similar species

Metaxia rugulosa (Adams, 1850)

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Metaxia taeniolata (Dall, 1889)]
Data retrieved on: 22 November 2013

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