Syrnola thelma
Drawing of a fragment of a shell of Syrnola thelma
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Syrnola
Species:
† S. thelma
Binomial name
† Syrnola thelma
Dall, 1913

Syrnola thelma is an extinct species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[1]

Description

The small shell has an elongate-conic shape. It has a smooth appearance, except for incremental lines. The suture is distinct but not deep. The apical portion is decollate. The aperture is narrowly ovate. The outer lip is simple and blunt. The base of the shell rounds into a strongly twisted short pillar. The body of the shell has no visible callus. The length of decollate fragment (two whorls) measures 2 mm, the diameter 1 mm.[1]

Distribution

A fragment of the shell of this brackish water species has been found near Alexandria, Louisiana.

References

  1. 1 2 W.H. Dall (1913), On a Brackish Water Pliocene Fauna of the Southern Coastal Plain; Proceedings U. S. National Museum, Vol. 46—No. 2023
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.